What is the stimulus for the release of insulin?
Low blood volume
Low blood levels of calcium
High blood levels of glucose
High blood levels of potassium
The Correct Answer is C
A. Low blood volume:
This stimulates ADH and aldosterone, not insulin.
B. Low blood levels of calcium:
This stimulates parathyroid hormone (PTH), not insulin.
C. High blood levels of glucose:
Insulin is secreted by the pancreas in response to elevated blood glucose to facilitate cellular uptake of glucose.
D. High blood levels of potassium:
Though insulin helps drive potassium into cells, its release is primarily stimulated by glucose.
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Related Questions
Correct Answer is D
Explanation
A. Are secreted in response to decreasing blood glucose levels:
Only glucagon is secreted when glucose is low; insulin is secreted when it is high.
B. Elevate blood glucose levels:
Only glucagon elevates blood glucose. Insulin lowers it.
C. Secreted by the beta cells of the islets of Langerhans:
Only insulin is secreted by beta cells. Glucagon is secreted by alpha cells.
D. Are secreted by the pancreas and are concerned with the regulation of blood glucose:
Both hormones are secreted by the pancreas and work together to regulate blood glucose levels- insulin lowers it, and glucagon raises it.
Correct Answer is C
Explanation
A. The ureters are blocked.: Ureters connect kidneys to bladder and are not directly affected by the prostate.
B. The ejaculatory duct is constricted: While the ejaculatory duct passes through the prostate, it doesn't cause urinary obstruction.
C. The prostate surrounds and compresses the urethra: Prostate enlargement compresses the urethra, obstructing urine flow.
D. The bladder becomes compressed.: The bladder may become overfilled but is not compressed by the prostate.
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