What is the book library you have for physiology
Finding Sources
Here are the 4 physiology textbooks available in the library:
| # | Title | Blocks |
|---|---|---|
| 1 | Costanzo Physiology - 7th Edition | 4 |
| 2 | Ganong's Review of Medical Physiology - 26th Edition | 6 |
| 3 | Guyton and Hall Textbook of Medical Physiology | 10 |
| 4 | Medical Physiology (Boron & Boulpaep) | 14 |
These are all major standard references used in medical education:
- Guyton & Hall - the most widely used physiology textbook in medicine, known for its clear explanations.
- Ganong's Review - popular for exam preparation, concise and concept-focused.
- Costanzo Physiology - favored for its systematic, easy-to-follow approach, especially for USMLE prep.
- Medical Physiology (Boron & Boulpaep) - the most detailed and research-oriented of the four, used for advanced study.
You can ask me any physiology question and I'll search across all four of these books for the best answer.
I want cut to cut answer
Got it. Ask your physiology question and I'll give you a direct, concise answer straight from the textbooks.
Differentiate between isotonic and isometric muscle contraction.
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| Feature | Isotonic Contraction | Isometric Contraction |
|---|---|---|
| Length | Muscle shortens | Muscle length stays constant |
| Tension | Tension remains constant | Tension increases but no shortening |
| Movement | Movement occurs | No movement occurs |
| Load | Muscle lifts a load (afterload) | Load exceeds force; muscle cannot shorten |
| Example | Lifting a dumbbell through a range of motion | Trying to lift an immovable object (e.g., a wall) |
| Energy use | Work is done (W = force × distance) | No external work done; energy released as heat |
| Velocity | Has a measurable velocity of shortening | Velocity of shortening = zero |
Key concept (Costanzo):
- In isometric contraction, the muscle develops tension at a preset length (preload) but is not allowed to shorten.
- In isotonic contraction, the muscle shortens against a constant load (afterload), and the velocity of shortening depends on the magnitude of that load - heavier load = slower shortening.
Is this okay for University Short answer questions
Yes, that table format is perfectly suited for a university short answer question. Here's why it works:
What's good:
- Covers all key differentiating points (length, tension, movement, load, example, work, velocity)
- Parallel structure makes comparison clear
- Concrete example for each type
- Includes the underlying mechanism (afterload/preload concept)
One tip: If your exam expects a written paragraph instead of a table, open with one defining sentence each, then contrast them:
In isotonic contraction, muscle length decreases while tension remains constant. In isometric contraction, tension develops but muscle length does not change and no shortening occurs.
Then follow with examples and mechanism. That covers both formats. For most university physiology exams, the table alone is sufficient and often preferred for a "differentiate" question.
Plasma proteins.
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Finding Sources
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Reading File
Reading File
Plasma Proteins
Definition
Proteins dissolved in the plasma fraction of blood. Normal total plasma protein = 6-8 g/dL.
Fractions
| Protein | Normal Level | Site of Synthesis | Functions |
|---|---|---|---|
| Albumin | 3.5-5.0 g/dL | Liver | Oncotic pressure, carrier for hormones/drugs/fatty acids, buffering |
| Globulins (α, β, γ) | 2.0-3.0 g/dL | Liver (α, β); Lymphocytes (γ) | Transport (α, β), antibodies (γ-immunoglobulins) |
| Fibrinogen | 0.2-0.4 g/dL | Liver | Blood clotting (converted to fibrin) |
Functions
- Oncotic (colloid osmotic) pressure - ~25 mmHg; keeps water in capillaries and prevents edema (mainly albumin)
- Buffering - contribute ~15% of blood buffering capacity via -COOH and -NH₂ groups
- Transport - carry hormones, lipids, drugs, metals (e.g., transferrin for iron, ceruloplasmin for copper, TBG for thyroxine)
- Immunity - γ-globulins = antibodies/immunoglobulins
- Coagulation - fibrinogen + clotting factors (II, V, VII, VIII, IX, X, XI, XII)
- Complement system - part of innate immunity
Key Points
- Plasma = serum + fibrinogen + clotting factors II, V, VIII
- Mostly synthesized in the liver (except antibodies from lymphocytes)
- At normal pH 7.4, proteins exist in anionic form
- Hypoproteinemia causes: starvation, liver disease, nephrosis, malabsorption → leads to edema
- Albumin synthesis is regulated - decreases in fasting, increases in nephrosis (compensatory)
(Ganong's Review of Medical Physiology, 26th ed.)
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