Which of the following is a feature of pleural membranes?
Secretes fluid to reduce friction between layers
Secretes a substance that reduces surface tension of alveoli
Secretes a substance to keep epithelial cells wet
Secretes fluid involved in protection from infections
The Correct Answer is A
a. Secretes fluid to reduce friction between layers: This is correct. The pleural membranes secrete pleural fluid, which reduces friction between the visceral and parietal layers during breathing.
b. Secretes a substance that reduces surface tension of alveoli: This describes the function of surfactant, which is secreted by alveolar cells, not pleural membranes.
c. Secretes a substance to keep epithelial cells wet: This is a general description that doesn't specifically apply to pleural membranes.
d. Secretes fluid involved in protection from infections: While pleural fluid may have some protective roles, its primary function is to reduce friction, not directly to protect from infections.
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Related Questions
Correct Answer is C
Explanation
a: Adrenal cortex and calcitonin hormone - Calcitonin is primarily secreted by the thyroid gland, not the adrenal cortex.
b: Hypothalamus and prolactin hormone - Prolactin is primarily secreted by the anterior pituitary gland, not the hypothalamus.
c. Anterior pituitary and growth hormone -The anterior pituitary gland secretes growth hormone (GH), which regulates growth, metabolism, and development.
d: Thyroid and thyroid-stimulating hormone - Thyroid-stimulating hormone (TSH) is secreted by the anterior pituitary gland, not the thyroid gland directly.
Correct Answer is D
Explanation
a. Insulin and glucagon: These hormones are produced by the pancreas and regulate blood glucose levels, not involved in the fight or flight response.
b. Dehydroepiandrosterone and estradiol: These are adrenal and gonadal hormones involved in sexual function and other roles, but not in the immediate stress response.
c. Ghrelin and kisspeptin: Ghrelin is involved in hunger signaling, and kisspeptin in reproductive hormone signaling, neither are involved in the stress response.
d. Epinephrine and norepinephrine: These are the primary hormones released by the adrenal medulla in response to stress, preparing the body for a fight or flight response by increasing heart rate, blood pressure, and blood glucose levels.
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