Question

select the correct answer.
which action is a reflex action?
a. asking for coffee in a cold climate
b. blinking when light is flashed in the eyes
c. drinking water when thirsty
d. swallowing food
e. taking an exam

Explanation:

A reflex action is an involuntary, automatic response to a stimulus, controlled by the spinal cord (or brainstem) without conscious thought.

• Option A: Asking for coffee is a voluntary, conscious action based on a need, not a reflex.
• Option B: Blinking when light is flashed is an involuntary response to protect the eyes, a classic reflex (corneal reflex).
• Option C: Drinking water when thirsty is a voluntary action driven by the conscious need to hydrate.
• Option D: Swallowing food involves both voluntary (initiating the swallow) and reflexive phases, but the overall action here is presented as voluntary in context.
• Option E: Taking an exam is a highly conscious, voluntary activity.

So, blinking when light is flashed is the reflex action.

Answer:

B. blinking when light is flashed in the eyes