ATI RN
Endocrine System Questions Questions
Question 1 of 5
Which connective tissue layer surrounds the biceps femoris muscle belly, separating it from the rest of the body?
Correct Answer: a
Rationale: The correct answer is A: Epimysium. Epimysium is the dense connective tissue layer that surrounds the entire muscle belly, providing structural support and protection. It separates the biceps femoris muscle from surrounding tissues. Perimysium (B) surrounds bundles of muscle fibers within the muscle belly, while endomysium (C) surrounds individual muscle fibers. Blood (D) is not a connective tissue layer but a fluid tissue responsible for transporting nutrients and waste products. Therefore, the epimysium is the correct choice as it specifically surrounds the biceps femoris muscle belly.
Question 2 of 5
“Sugar, salt, and sex†is descriptive of
Correct Answer: B
Rationale: The correct answer is B: cortisol, aldosterone, and testosterone. "Sugar, salt, and sex" refers to hormones produced by the adrenal glands. Cortisol regulates sugar metabolism, aldosterone regulates salt balance, and testosterone is involved in sexual characteristics. A: ACTH, TSH, and somatotropic hormone are hormones produced by the pituitary gland. C: Epinephrine, norepinephrine, and estrogen are not directly related to the terms given. D: Insulin, glucagon, and cortisol are involved in glucose regulation, but do not match the specific terms provided.
Question 3 of 5
The only hormone that lowers blood glucose levels is:
Correct Answer: B
Rationale: The correct answer is B: insulin. Insulin is produced by the pancreas and helps lower blood glucose levels by promoting the uptake of glucose into cells for energy or storage. Glucagon (A) raises blood glucose levels, epinephrine (C) and cortisol (D) also increase blood glucose levels by stimulating the release of glucose from storage sites.
Question 4 of 5
Which of the following is most likely to cause the secretion of calcitonin?
Correct Answer: D
Rationale: The correct answer is D: Elevated plasma calcium level. Calcitonin is released from the thyroid gland in response to high levels of calcium in the blood. When plasma calcium levels are elevated, calcitonin is secreted to help regulate calcium homeostasis by promoting calcium deposition in bones. Choices A, B, and C are incorrect because hypocalcemia (low calcium levels), hyperglycemia (high blood sugar levels), and dehydration do not directly stimulate the secretion of calcitonin.
Question 5 of 5
Which of the following is true of the hypothalamus?
Correct Answer: A
Rationale: The correct answer is A because the hypothalamus secretes releasing hormones into the portal capillaries, which then travel to the anterior pituitary to regulate hormone secretion. This is known as the hypothalamic-pituitary axis. Choices B and C are incorrect because the hypothalamus is not composed of glandular tissue and it is not called the adenohypophysis. Choice D is incorrect because the connection between the hypothalamus and the neurohypophysis is via the hypothalamic-hypophyseal tract, not through the portal capillaries.