A drunk person walks unsteadily and cannot coordinate movements because alcohol mainly affects the
Correct answer: B. cerebellum
- A. medulla oblongata
- B. cerebellum
- C. hypothalamus
- D. pituitary gland
Explanation
The cerebellum fine tunes posture, balance and the timing of voluntary movement, so its depression by alcohol produces staggering and clumsiness. The medulla keeps the heart and lungs running, which is why severe poisoning, not drunkenness, threatens life.
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Receptors are specialized cells or proteins that detect stimuli such as light, sound, pressure, temperature and chemicals, then initiate responses through sensory or hormonal pathways. Questions distinguish sensory receptors from effectors, compare receptor types, and examine stimulus conversion into nerve impulses, including the roles of rods, cones, chemoreceptors and mechanoreceptors.
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