Biology Practice: Nervous System (Mock Test 4 - Expert: Clinical Logic & Experimental Data)
1. In a laboratory experiment, a nerve fiber was treated with a chemical that blocks the "Sodium-Potassium Pump". What is the most likely observation?
2. A patient survives a head injury but is unable to form new memories while remembering everything from the past. Which specific sub-cortical area is likely damaged?
3. Clinical Case: A person can feel the sensation of a pinprick in their leg but is unable to move the leg. This indicates damage to:
4. Data Analysis: The speed of an impulse in Axon A (myelinated) is $100\text{ m/s}$ and in Axon B (unmyelinated) is $5\text{ m/s}$. Why?
5. If the Cerebrospinal Fluid (CSF) is drained completely from the ventricles, what would be the logical physical consequence?
6. A child is born with an underdeveloped Cerebellum. Which developmental milestone will be most delayed?
7. Why does the "Knee-jerk reflex" occur even if the connection to the brain is temporarily blocked?
8. Experimental Logic: Acetylcholinesterase is an enzyme that breaks down Acetylcholine. What happens if this enzyme is inhibited by a toxin?
9. Which of the following data confirms the dominance of the "Sympathetic System" during an exam?
10. Logical Step: Why is the "Gray matter" of the spinal cord internal, unlike the brain?
11. A doctor taps the tendon below the patella to check for ________ integrity.
12. Clinical Symptom: Loss of ability to speak or understand language after a stroke in the left hemisphere. This indicates damage to:
13. Why does a person stop breathing if the Medulla Oblongata is crushed?
14. When you learn to ride a bicycle, it is initially voluntary but eventually becomes a ________ reflex.
15. Data: A nerve is found to have only efferent fibers. This nerve is technically a:
16. What is the logical clinical use of measuring the presence of certain chemicals in the CSF?
17. Logical Inference: If the "Thalamus" is damaged, which sensation will still likely reach the brain?
18. Why does the impulse speed increase in the presence of Nodes of Ranvier?
19. "Multiple Sclerosis" is a disease where the immune system attacks the myelin sheath. What is the logical result?
20. In an experiment, the "Posterior Root Ganglion" was removed. What would be the anatomical result?
