150 MCQs - Nervous System & Human Organ System (Class 8)
Based on "Nervous 8.pdf"
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SECTION 1: INTRODUCTION TO NERVOUS SYSTEM

Q1. What is the function of the nervous system in the human body?
A) Digestion of food
B) Controls and coordinates functions of all other organ systems
C) Transports oxygen to cells
D) Filters waste from blood
ANSWER: B

Q2. The nervous system acts as the body's:
A) Digestive system
B) Communication system
C) Immune system
D) Skeletal framework
ANSWER: B

Q3. How many main parts is the nervous system divided into?
A) Three
B) Four
C) Two
D) Five
ANSWER: C

Q4. Which two parts make up the nervous system?
A) Brain and Spinal Cord
B) Central Nervous System and Peripheral Nervous System
C) Sensory and Motor systems
D) Sympathetic and Parasympathetic systems
ANSWER: B

Q5. The nervous system gives signals to the excretory system to:
A) Produce more blood
B) Remove metabolic wastes from the body
C) Increase breathing rate
D) Regulate body temperature
ANSWER: B

Q6. Which organ system is responsible for recognizing and remembering things?
A) Digestive system
B) Respiratory system
C) Nervous system
D) Circulatory system
ANSWER: C

Q7. The basic structural and functional unit of the nervous system is called a:
A) Tissue
B) Organ
C) Neuron
D) Nucleus
ANSWER: C

Q8. Neurons are described as:
A) Building blocks of the nervous system
B) Types of blood cells
C) Parts of the digestive system
D) Components of the skeleton
ANSWER: A

Q9. Which of the following is NOT controlled by the nervous system?
A) Thinking and feelings
B) Breathing
C) Photosynthesis
D) Heartbeat
ANSWER: C

Q10. The nervous system is a network of:
A) Blood vessels
B) Nerves linking the brain to every part of the body
C) Bones
D) Muscles
ANSWER: B

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SECTION 2: CENTRAL NERVOUS SYSTEM (CNS)

Q11. The Central Nervous System (CNS) is composed of:
A) Heart, lungs and liver
B) Brain, spinal cord and nerves
C) Stomach, intestines and kidneys
D) Muscles, tendons and ligaments
ANSWER: B

Q12. The CNS controls all vital functions necessary for living such as:
A) Digestion, absorption, secretion
B) Breathing, body temperature, thinking, feelings and heartbeat
C) Movement, balance and posture only
D) Hormone production and blood flow
ANSWER: B

Q13. The structure of the brain is very similar to the structure of a:
A) Apple
B) Walnut
C) Orange
D) Kidney
ANSWER: B

Q14. The brain is enclosed in a hard-bony protective structure called:
A) Vertebra
B) Ribcage
C) Cranium (skull)
D) Sternum
ANSWER: C

Q15. The brain appears as a large:
A) Yellow smooth ball
B) Pinkish-grey walnut with folds and depressions
C) White smooth oval
D) Red spongy mass
ANSWER: B

Q16. The brain has folds and depressions which give it a:
A) Smooth appearance
B) Wrinkled appearance
C) Flat appearance
D) Bumpy appearance
ANSWER: B

Q17. The brain serves as the:
A) Pumping centre of the body
B) Filtering centre of the body
C) Control centre of the human body
D) Storage centre of nutrients
ANSWER: C

Q18. The brain consists of how many parts?
A) Two
B) Four
C) Five
D) Three
ANSWER: D

Q19. The three parts of the brain are:
A) Cerebrum, Cerebellum, and Medulla
B) Fore Brain, Mid Brain, and Hind Brain
C) Thalamus, Hypothalamus, and Brainstem
D) Left, Right and Central hemispheres
ANSWER: B

Q20. Even while sleeping, the brain is:
A) Completely resting
B) Partially inactive
C) Always working
D) Shut down temporarily
ANSWER: C

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SECTION 3: FORE BRAIN (CEREBRUM)

Q21. The largest part of the brain is:
A) Cerebellum
B) Medulla oblongata
C) Cerebrum (Fore Brain)
D) Pons
ANSWER: C

Q22. The cerebrum comprises how many hemispheres?
A) Three
B) Four
C) One
D) Two
ANSWER: D

Q23. The right hemisphere of the cerebrum controls:
A) The right side of the body
B) The left side of the body
C) Both sides equally
D) Only the face
ANSWER: B

Q24. The left hemisphere of the cerebrum controls:
A) The left side of the body
B) Both sides equally
C) The right side of the body
D) Only the limbs
ANSWER: C

Q25. Which of the following actions does the cerebrum NOT control?
A) Thinking
B) Feelings
C) Memory
D) Digestion of food
ANSWER: D

Q26. The cerebrum controls:
A) Thinking, feelings, memory, hearing, seeing, speech and decision making
B) Only breathing and heartbeat
C) Only balance and posture
D) Blood pressure and digestion
ANSWER: A

Q27. The thalamus lies:
A) Below the brainstem
B) Inside the cerebrum
C) Behind the cerebellum
D) Outside the skull
ANSWER: B

Q28. The thalamus controls:
A) Motor functions
B) Sensory functions
C) Balance
D) Breathing
ANSWER: B

Q29. The hypothalamus lies:
A) Inside the cerebellum
B) At the base of the thalamus
C) Above the cerebrum
D) Behind the medulla
ANSWER: B

Q30. The hypothalamus controls:
A) Visual reflexes
B) Speech and memory
C) Body temperature, feeling of hunger and thirst
D) Muscular coordination
ANSWER: C

Q31. Which lobe of the cerebral cortex is responsible for initiating and coordinating motor movements and higher thinking skills?
A) Temporal lobe
B) Occipital lobe
C) Parietal lobe
D) Frontal lobe
ANSWER: D

Q32. The frontal lobe is responsible for:
A) Auditory processing only
B) Visual processing only
C) Problem solving, planning, reasoning and aspects of personality
D) Sensory processing and navigating spaces
ANSWER: C

Q33. The parietal lobe is involved with:
A) Auditory information only
B) Sensory processes, attention and language
C) Motor control only
D) Visual reflexes only
ANSWER: B

Q34. The right side of the parietal lobe helps in:
A) Understanding written language
B) Navigating spaces
C) Processing sound
D) Controlling heartbeat
ANSWER: B

Q35. The left side of the parietal lobe helps to:
A) Navigate spaces
B) Process pain
C) Understand spoken and written language including recognition of shapes and colors
D) Control breathing
ANSWER: C

Q36. The temporal lobe helps to:
A) Process visual information only
B) Coordinate motor movements
C) Process auditory information and integrate information from other senses
D) Control body temperature
ANSWER: C

Q37. The temporal lobe plays a role in:
A) Long-term memory only
B) Short-term memory formation
C) Visual processing
D) Sensory and motor coordination
ANSWER: B

Q38. The occipital lobe helps process:
A) Auditory information
B) Taste and smell
C) Visual information including recognition of colours
D) Sensory processes and language
ANSWER: C

Q39. All four lobes (frontal, parietal, temporal, occipital) make up the:
A) Hind brain
B) Mid brain
C) Fore brain
D) Spinal cord
ANSWER: C

Q40. Which lobe is associated with problem solving, planning, and reasoning?
A) Occipital lobe
B) Parietal lobe
C) Temporal lobe
D) Frontal lobe
ANSWER: D

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SECTION 4: MID BRAIN

Q41. The midbrain consists of:
A) Pons and cerebellum
B) Thalamus and hypothalamus
C) Optic lobes
D) Medulla oblongata
ANSWER: C

Q42. The optic lobes in the midbrain are:
A) Two large bodies
B) Four small bodies
C) Three medium-sized bodies
D) One large body
ANSWER: B

Q43. The optic lobes are concerned with:
A) Hearing reflexes
B) Touch sensation
C) Visual reflexes, e.g., movement of the eyeballs
D) Balance and posture
ANSWER: C

Q44. The movement of eyeballs is controlled by which part of the brain?
A) Cerebellum
B) Optic lobes of midbrain
C) Frontal lobe
D) Medulla oblongata
ANSWER: B

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SECTION 5: HIND BRAIN

Q45. The hind brain consists of how many parts?
A) Two
B) Four
C) Three
D) Five
ANSWER: C

Q46. Which of the following is NOT a part of the hind brain?
A) Pons
B) Cerebellum
C) Medulla oblongata
D) Thalamus
ANSWER: D

Q47. The Pons is described as a:
A) Spiral structure
B) Bridge-like structure that links different parts of the brain
C) Dome-shaped structure
D) Tube-like structure
ANSWER: B

Q48. The Pons conveys signals from the medulla to:
A) The spinal cord
B) The peripheral nerves
C) The higher parts of the brain
D) The kidneys
ANSWER: C

Q49. The Pons controls:
A) Visual reflexes
B) Facial expressions, sleeping and breathing
C) Memory and decision making
D) Digestion only
ANSWER: B

Q50. The cerebellum lies:
A) Below the medulla
B) Inside the cerebrum
C) Dorsally behind the optic lobes
D) At the base of the brainstem
ANSWER: C

Q51. The surface of the cerebellum:
A) Is smooth
B) Contains many folds
C) Is flat
D) Has no distinguishing features
ANSWER: B

Q52. The cerebellum plays an important part in:
A) Decision making and memory
B) Controlling muscular coordination and maintaining body balance
C) Regulating body temperature
D) Processing visual information
ANSWER: B

Q53. The medulla oblongata lies:
A) Above the cerebrum
B) Inside the cerebrum
C) Below the cerebellum
D) In front of the pons
ANSWER: C

Q54. The lower end of the medulla oblongata:
A) Connects to the cerebrum
B) Gradually narrows down into the spinal cord
C) Expands into the cerebellum
D) Connects directly to the kidneys
ANSWER: B

Q55. The medulla oblongata controls:
A) Voluntary actions only
B) Decision making and reasoning
C) Involuntary reflex actions such as blood pressure, heartbeat, peristalsis, respiratory rate and contraction/dilation of blood vessels
D) Memory and thinking
ANSWER: C

Q56. Which part of the hind brain controls blood pressure?
A) Cerebellum
B) Pons
C) Medulla oblongata
D) Optic lobes
ANSWER: C

Q57. Peristalsis is controlled by the:
A) Cerebrum
B) Cerebellum
C) Medulla oblongata
D) Thalamus
ANSWER: C

Q58. The contraction and dilation of blood vessels is controlled by:
A) The frontal lobe
B) The cerebellum
C) The pons
D) The medulla oblongata
ANSWER: D

Q59. Which structure connects the brain to the spinal cord?
A) Cerebellum
B) Brainstem (Medulla Oblongata)
C) Thalamus
D) Pons
ANSWER: B

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SECTION 6: SPINAL CORD

Q60. The spinal cord is a long piece of:
A) Bone tissue
B) Muscle tissue
C) Nerve tissue
D) Connective tissue
ANSWER: C

Q61. The spinal cord runs from the brain through:
A) The ribcage
B) The backbone within the vertebral column
C) The abdominal cavity
D) The chest cavity
ANSWER: B

Q62. The spinal cord is essentially:
A) An extension of the brain through the vertebral column
B) A separate organ independent of the brain
C) A part of the peripheral nervous system only
D) A muscle attached to the backbone
ANSWER: A

Q63. The spinal cord receives sensory information from:
A) Front parts of the body
B) Back parts of the body
C) Only the head
D) Only the limbs
ANSWER: B

Q64. The spinal cord connects the brain to:
A) The kidneys
B) The heart
C) The body's nerves
D) The digestive system
ANSWER: C

Q65. Which of the following functions is regulated by the spinal cord?
A) Decision making
B) Problem solving
C) Functions not under the control of a person's will, such as breathing, heartbeat, blinking and blood pressure
D) Thinking and memory
ANSWER: C

Q66. Blinking of eyes is regulated by:
A) The frontal lobe
B) The cerebrum
C) The spinal cord
D) The thalamus
ANSWER: C

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SECTION 7: PERIPHERAL NERVOUS SYSTEM (PNS)

Q67. The peripheral nervous system consists of:
A) Only the brain and spinal cord
B) Nerves that branch out from the CNS to the rest of the body
C) Only sensory organs
D) The heart and lungs
ANSWER: B

Q68. The PNS acts as:
A) The control centre of the body
B) Lines of communication between the CNS and the rest of the body
C) The protection system of the brain
D) The filtering system of the blood
ANSWER: B

Q69. Nerves that carry messages TO the brain and spinal cord are called:
A) Motor nerves
B) Autonomic nerves
C) Sensory nerves
D) Efferent nerves
ANSWER: C

Q70. Nerves that carry messages AWAY from the brain or spinal cord to the organs are called:
A) Sensory nerves
B) Motor nerves
C) Cranial nerves
D) Afferent nerves
ANSWER: B

Q71. The peripheral nervous system is divided into:
A) Sensory and Motor only
B) Autonomic (Involuntary) and Somatic (Voluntary)
C) Central and Peripheral
D) Brain and Spinal cord
ANSWER: B

Q72. The Autonomic nervous system is also called:
A) Voluntary system
B) Involuntary system
C) Somatic system
D) Motor system
ANSWER: B

Q73. The Somatic nervous system is also called:
A) Involuntary system
B) Autonomic system
C) Voluntary system
D) Sympathetic system
ANSWER: C

Q74. The autonomic nervous system is further divided into:
A) Sensory and Motor
B) Sympathetic and Parasympathetic
C) Central and Peripheral
D) Frontal and Parietal
ANSWER: B

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SECTION 8: NEURONS

Q75. A neuron has which of the following main parts? (As shown in the diagram)
A) Nucleus, Cell body, and Axon
B) Heart, Liver, and Kidney
C) Cilia, Flagella, and Dendrites
D) Membrane, Wall, and Vacuole
ANSWER: A

Q76. The axon is part of a:
A) Muscle cell
B) Bone cell
C) Neuron
D) Blood cell
ANSWER: C

Q77. Neurons are the basic structural and functional units of:
A) The digestive system
B) The nervous system
C) The respiratory system
D) The excretory system
ANSWER: B

Q78. The cell body of a neuron contains the:
A) Axon only
B) Nucleus
C) Nerve ending only
D) Synapse only
ANSWER: B

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SECTION 9: REFLEX ACTION

Q79. A reflex action is defined as:
A) A slow, thought-out response
B) A quick action in which the brain is not involved
C) A voluntary movement
D) A response that takes minutes to occur
ANSWER: B

Q80. Which of the following is an example of reflex action described in the text?
A) Writing a letter
B) Eating food deliberately
C) Immediately pulling your hand away from a hot pot
D) Walking to school
ANSWER: C

Q81. Reflex actions are described as:
A) Slow and deliberate
B) Automatic and superfast
C) Voluntary and controlled
D) Random and unpredictable
ANSWER: B

Q82. In reflex action, the nerve message that causes the hand to withdraw from heat is:
A) First processed by the brain and then sent to the hand
B) Detected by nerves in the hand and sent to the nerve centre in the spinal cord, which sends back a message immediately
C) Controlled by the cerebrum only
D) Ignored by the nervous system
ANSWER: B

Q83. In a reflex arc, the nerve centre that sends back a message to withdraw the hand is located in:
A) The brain
B) The heart
C) The spinal cord
D) The kidney
ANSWER: C

Q84. How quickly does reflex action happen?
A) In a few minutes
B) Within a fraction of a second
C) Within an hour
D) In a few seconds
ANSWER: B

Q85. Which of the following is NOT listed as a natural reflex action?
A) Closing eyes quickly when object approaches
B) Withdrawing hand when pricked
C) Coughing and sneezing
D) Walking and running
ANSWER: D

Q86. Reflex actions are controlled by nerve messages that work:
A) After the person thinks about them
B) Even before the person thinks about them
C) Only when the brain is awake
D) Only during sleep
ANSWER: B

Q87. In a reflex arc, which of the following is the receptor?
A) Muscle (effector)
B) Spinal cord
C) Motor neuron
D) Sensory receptor (e.g., nerves in the hand)
ANSWER: D

Q88. In a reflex arc, the ganglion is located near:
A) The brain
B) The heart
C) The spinal cord
D) The eye
ANSWER: C

Q89. In the reflex action diagram, which neuron carries the signal FROM the receptor to the spinal cord?
A) Motor neuron
B) Interneuron
C) Sensory neuron
D) Ganglion
ANSWER: C

Q90. In the reflex action diagram, which neuron carries the signal FROM the spinal cord to the muscle (effector)?
A) Sensory neuron
B) Motor neuron
C) Receptor
D) Ganglion
ANSWER: B

Q91. Coughing is an example of:
A) Voluntary action
B) Natural reflex action
C) Learned behavior
D) Digestive process
ANSWER: B

Q92. Sneezing is classified as:
A) A voluntary action
B) A decision-based action
C) A natural reflex action
D) A learned response
ANSWER: C

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SECTION 10: VOLUNTARY AND INVOLUNTARY ACTIONS

Q93. Voluntary actions are defined as:
A) Actions that occur without conscious control
B) Actions performed according to our wish
C) Automatic bodily functions
D) Actions controlled by the spinal cord only
ANSWER: B

Q94. Which of the following is an example of a voluntary action?
A) Breathing
B) Blinking of eyes
C) Heartbeat
D) Eating and walking
ANSWER: D

Q95. Involuntary actions are defined as:
A) Actions performed according to the individual's will
B) Actions that occur without conscious control
C) Actions that require thinking
D) Actions only performed during sleep
ANSWER: B

Q96. Which of the following is an example of an involuntary action?
A) Eating
B) Bathing
C) Walking
D) Breathing
ANSWER: D

Q97. Which of the following is listed as a voluntary (conscious) action?
A) Contraction of the heart
B) Blood flow
C) Bathing and running
D) Digestion
ANSWER: C

Q98. Blinking of eyes is classified as:
A) A voluntary action
B) A conscious decision
C) An involuntary action
D) A reflex unique to humans
ANSWER: C

Q99. The fore brain is responsible for:
A) Involuntary actions
B) Voluntary actions
C) Reflex actions
D) Balance only
ANSWER: B

Q100. Most biological processes in animals are:
A) Voluntary
B) Involuntary
C) Under conscious control
D) Performed deliberately
ANSWER: B

Q101. Contraction of the heart is:
A) A voluntary action
B) An involuntary action
C) A conscious reflex
D) Controlled by the frontal lobe
ANSWER: B

Q102. Blood flow in the body is:
A) A voluntary action we can fully control
B) An involuntary action we cannot alter
C) A conscious decision
D) Controlled by the cerebrum
ANSWER: B

Q103. Which brain region is responsible for voluntary actions like eating and walking?
A) Hind brain
B) Mid brain
C) Fore brain
D) Spinal cord only
ANSWER: C

Q104. Digestion is considered an involuntary action because:
A) It is performed by muscles we choose to use
B) We cannot alter its course of action
C) It is controlled by the cerebrum
D) We decide when to digest food
ANSWER: B

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SECTION 11: STRUCTURE AND COMPONENTS - MIXED

Q105. Which part of the brain is responsible for visual reflexes?
A) Cerebrum
B) Pons
C) Optic lobes (Midbrain)
D) Medulla oblongata
ANSWER: C

Q106. Which part of the brain is responsible for maintaining body balance?
A) Medulla oblongata
B) Cerebrum
C) Pons
D) Cerebellum
ANSWER: D

Q107. Breathing is controlled by which part of the brain?
A) Cerebrum
B) Medulla oblongata and Pons
C) Thalamus only
D) Occipital lobe
ANSWER: B

Q108. Which structure lies below the cerebellum?
A) Pons
B) Cerebrum
C) Medulla oblongata
D) Optic lobes
ANSWER: C

Q109. What connects the brain to the body's nerves?
A) The thalamus
B) The spinal cord
C) The cerebellum
D) The pons
ANSWER: B

Q110. Sensory functions are controlled by which part of the brain?
A) Hypothalamus
B) Thalamus
C) Medulla oblongata
D) Cerebellum
ANSWER: B

Q111. The feeling of hunger and thirst is regulated by:
A) Thalamus
B) Cerebrum
C) Hypothalamus
D) Medulla oblongata
ANSWER: C

Q112. Facial expressions are controlled by:
A) Cerebrum
B) Medulla oblongata
C) Pons
D) Thalamus
ANSWER: C

Q113. Which part of the nervous system has speedy nerve cells called neurons?
A) Skeletal system
B) Digestive system
C) Nervous system
D) Circulatory system
ANSWER: C

Q114. The rate of respiratory movements is regulated by which part of the brain?
A) Cerebrum
B) Pons
C) Medulla oblongata
D) Cerebellum
ANSWER: C

Q115. Which brain region connects the brain to the spinal cord and is also called the brainstem?
A) Cerebellum
B) Medulla oblongata
C) Thalamus
D) Pons
ANSWER: B

Q116. The vertebral column protects which structure?
A) The brain
B) The spinal cord
C) The thalamus
D) The cerebellum
ANSWER: B

Q117. The skull (cranium) protects which structure?
A) The spinal cord
B) The lungs
C) The brain
D) The heart
ANSWER: C

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SECTION 12: CLASSIFICATION AND SUMMARY

Q118. The nervous system is classified into:
A) Three parts: CNS, PNS, and ANS
B) Two parts: CNS and PNS
C) Four parts: brain, spinal cord, sensory and motor
D) Two parts: voluntary and involuntary
ANSWER: B

Q119. Which division of the PNS handles involuntary functions?
A) Somatic system
B) Voluntary system
C) Autonomic system
D) Motor system
ANSWER: C

Q120. Which division of the PNS handles voluntary functions?
A) Autonomic system
B) Somatic system
C) Sympathetic system
D) Involuntary system
ANSWER: B

Q121. The CNS includes:
A) Only the brain
B) Only the spinal cord
C) Brain and spinal cord and nerves
D) Peripheral nerves only
ANSWER: C

Q122. The PNS acts as communication lines between:
A) The lungs and heart
B) The CNS and the rest of the body
C) The brain and the heart only
D) The stomach and kidneys
ANSWER: B

Q123. In the nervous system classification, the Sympathetic division is part of:
A) Somatic system
B) CNS
C) Autonomic (Involuntary) system
D) Voluntary system
ANSWER: C

Q124. In the nervous system classification, the Parasympathetic division is part of:
A) Somatic system
B) Voluntary system
C) CNS
D) Autonomic (Involuntary) system
ANSWER: D

Q125. Which of the following correctly lists hind brain structures?
A) Cerebrum, thalamus, hypothalamus
B) Optic lobes, thalamus, hypothalamus
C) Pons, cerebellum, medulla oblongata
D) Cerebrum, cerebellum, pons
ANSWER: C

Q126. The brain is made up of:
A) Hard bone tissue
B) Soft nerve tissues
C) Cartilage
D) Muscle fibers
ANSWER: B

Q127. Body temperature is regulated by which structure?
A) Thalamus
B) Cerebrum
C) Hypothalamus
D) Cerebellum
ANSWER: C

Q128. The cerebral cortex is divided into how many functional zones?
A) Two
B) Three
C) Five
D) Four
ANSWER: D

Q129. Which lobe of the cerebral cortex processes color recognition?
A) Frontal lobe
B) Parietal lobe
C) Temporal lobe
D) Occipital lobe
ANSWER: D

Q130. Which lobe of the cerebral cortex processes auditory (hearing) information?
A) Frontal lobe
B) Occipital lobe
C) Temporal lobe
D) Parietal lobe
ANSWER: C

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SECTION 13: APPLIED AND REASONING QUESTIONS

Q131. A person accidentally touches a flame and immediately pulls their hand away. This is an example of:
A) A voluntary action
B) A reflex action
C) A learned response
D) A brain-directed decision
ANSWER: B

Q132. Which part of the nervous system is primarily involved in the reflex arc described in the text?
A) Cerebrum
B) Spinal cord
C) Cerebellum
D) Hypothalamus
ANSWER: B

Q133. If the medulla oblongata was damaged, which of the following functions would be most immediately affected?
A) Vision and color recognition
B) Memory and decision making
C) Blood pressure, heartbeat and breathing
D) Voluntary movement
ANSWER: C

Q134. If the cerebellum was damaged, what would be most directly impaired?
A) Vision
B) Memory
C) Muscular coordination and body balance
D) Heartbeat regulation
ANSWER: C

Q135. If the hypothalamus was damaged, a person would likely have problems with:
A) Vision
B) Hearing
C) Controlling body temperature and sensing hunger and thirst
D) Motor movements
ANSWER: C

Q136. If the frontal lobe was damaged, which ability would be most affected?
A) Vision
B) Hearing
C) Problem solving, planning, and personality
D) Balance
ANSWER: C

Q137. If the occipital lobe was damaged, which function would be most affected?
A) Speech
B) Memory
C) Balance
D) Visual processing and color recognition
ANSWER: D

Q138. If the temporal lobe was damaged, what would be primarily affected?
A) Vision
B) Motor coordination
C) Auditory processing and short-term memory
D) Blood pressure
ANSWER: C

Q139. Wearing helmets while travelling helps protect:
A) The kidneys
B) The lungs
C) The brain and senses
D) The heart
ANSWER: C

Q140. A person cannot control the rate at which their heart beats. This is because heartbeat is:
A) Controlled by voluntary muscles
B) An involuntary action regulated by the medulla oblongata
C) A reflex controlled by the spinal cord only
D) Controlled by the cerebrum
ANSWER: B

Q141. The right side of the parietal lobe helps a person to:
A) Understand written language
B) Navigate spaces
C) Process sounds
D) Control body temperature
ANSWER: B

Q142. Sensory nerves carry messages:
A) From the brain to organs
B) To the brain and spinal cord
C) Only from the spinal cord to muscles
D) From muscles to other muscles
ANSWER: B

Q143. Motor nerves carry messages:
A) To the brain and spinal cord
B) From sensory organs to the brain
C) Away from brain or spinal cord to the organs
D) Between neurons only
ANSWER: C

Q144. Which structure allows the signals from medulla to reach higher parts of the brain?
A) Cerebellum
B) Thalamus
C) Pons
D) Spinal cord
ANSWER: C

Q145. A reflex arc involves which sequence?
A) Brain → Spinal cord → Muscle
B) Receptor → Sensory neuron → Spinal cord → Motor neuron → Effector (muscle)
C) Brain → Muscle → Receptor
D) Effector → Motor neuron → Brain → Sensory neuron
ANSWER: B

Q146. Which part of the brain is responsible for sleeping?
A) Cerebrum
B) Pons
C) Medulla oblongata
D) Cerebellum
ANSWER: B

Q147. The nervous system processes information collected by:
A) The digestive system
B) The body and the senses
C) The excretory system
D) The circulatory system
ANSWER: B

Q148. Which of the following is NOT a function of the cerebrum?
A) Thinking
B) Hearing
C) Maintaining body balance
D) Memory
ANSWER: C

Q149. The activity described in the chapter to understand brain structure involves:
A) Dissecting an animal brain
B) Drawing brain zones on a cap and wearing it
C) Using a computer simulation
D) Reading a book about the brain
ANSWER: B

Q150. Which of the following BEST describes the relationship between the CNS and PNS?
A) They are completely independent systems
B) The PNS serves as communication lines between the CNS and the rest of the body
C) The CNS sends all messages without involving the PNS
D) The PNS controls voluntary actions while the CNS controls involuntary actions only
ANSWER: B

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END OF MCQ SET - 150 Questions
Topic: Nervous System (Chapter 1 - Human Organ System, Class 8)
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