Q1. [1] deep thorough-understanding
Assertion (A): A person with a damaged cerebellum can still respond to a sudden loud noise by blinking, but struggles to ride a bicycle smoothly.
Reason (R): Reflex actions are mediated by the spinal cord, whereas precise coordination of voluntary movements depends on the cerebellum.
Choose the correct option:
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is not the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
- A Both A and R are true and R is the correct explanation of A.
- B Both A and R are true but R is not the correct explanation of A.
- C A is true but R is false.
- D A is false but R is true.
Generated by claude-sonnet-4-6 · 2026-06-26 01:03 · grounding rag
Model Answer
(A) Both A and R are true and R is the correct explanation of A.
Blinking to a loud noise is a reflex (spinal cord-mediated), unaffected by cerebellar damage. Riding a bicycle requires precision and balance, which the cerebellum controls.
Explanation
The textbook states reflex arcs are formed in the spinal cord, so they are unaffected by cerebellar damage. It also explicitly states the cerebellum is responsible for "precision of voluntary actions and maintaining posture and balance." R directly explains why A is true, making option (A) correct.