BIOD322 Module 1 LATEST EXAM READINESS GUIDE QUESTIONS & ANSWERS

BIOD322 Module 1 LATEST EXAM READINESS GUIDE QUESTIONS & ANSWERS

1. Which structure is responsible for the production of
cerebrospinal fluid (CSF)?
 A. Choroid plexus
 B. Arachnoid villi
 C. Pia mater
 D. Dura mater
 Correct Answer: A. Choroid plexus
 Rationale: The choroid plexus is a network of cells that
line the ventricles of the brain and produce CSF.
2. The blood-brain barrier (BBB) is selectively permeable
due to the presence of:
 A. Astrocyte end-feet
 B. Microglial cells
 C. Oligodendrocytes
 D. Neuronal axons
 Correct Answer: A. Astrocyte end-feet
 Rationale: Astrocyte end-feet contribute to the BBB's
selective permeability by forming tight junctions with
endothelial cells.
3. Which ion channel is primarily responsible for the
initiation of action potentials in neurons?
 A. Potassium channels
 B. Sodium channels
 C. Calcium channels
 D. Chloride channels
 Correct Answer: B. Sodium channels
 Rationale: Voltage-gated sodium channels open in
response to membrane depolarization, initiating the action
potential.

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