Practice Quiz

IB Biology Exam Prep

Category - Biology

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A veterinarian finds that a cat has a lesion on its hypothalamus. This injury would most directly affect the cat's ability to:
  1. Coordinate muscle movements.
  2. Regulate its body temperature.
  3. Perceive visual stimuli.
  4. Control its breathing.
Explanation
Correct Response: B. The hypothalamus is a section of the brain that produces hormones that help regulate bodily functions, such as body temperature, thirst, and hunger. The skeletal muscles that produce coordinated movements (A) and the perception of visual stimuli (C) are controlled by the somatic nervous system, not the hypothalamus. Breathing is controlled (D) by the autonomic nervous system, not the hypothalamus.
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