A lymphatic capillary absorbs fats from the intestine. This specialized lymph vessel is a:
Correct Answer: A. Lacteal
MCQ Collection
Animal Form and Function-I MCQs
Practice Animal Form and Function-I questions with answers and explanations.
A student compares endocrine feedback with a thermostat. Negative feedback is useful because it:
Correct Answer: A. Maintains internal variables near a set point
A student studies hormone chemistry. Amino acid derivative hormones include examples such as:
Correct Answer: A. Thyroxine and adrenaline
If target cells down-regulate receptors after long exposure to high hormone levels, the result is:
Correct Answer: A. Reduced sensitivity to the hormone
A student sees interstitial fluid returning to blood through lymph vessels. The lymphatic system helps:
Correct Answer: A. Maintain fluid balance
During endocrine disruption, small environmental chemicals mimic hormones. The main danger is that they may:
Correct Answer: A. Activate or block hormone receptors incorrectly
An animal adapts to cold partly by increasing metabolic heat production through thyroid hormone. This shows endocrine regulation can influence:
Correct Answer: A. Energy metabolism
A student identifies a chemical messenger released by one cell and acting on nearby cells without entering blood widely. This is closer to:
Correct Answer: A. Paracrine signaling
Swelling occurs when lymph drainage is blocked. This swelling is due to:
Correct Answer: A. Fluid accumulation in tissues
A student says hormones act only in vertebrates. The best correction is that hormones or hormone-like messengers occur in:
Correct Answer: A. Both invertebrates and vertebrates
A feedback system fails and hormone secretion continues despite high hormone level. This would most likely cause:
Correct Answer: A. Overstimulation of target tissues
A hormone acts on the same cell that secreted it. This is called:
Correct Answer: A. Autocrine signaling