Multiple Choice
What is the effect of insulin on lipid fatty acid synthesis?
12. Biosignaling
Insulin
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What is the primary function of the peptide insulin?
A
To stimulate transport of glucose out of the cell and into the bloodstream.
B
To stimulate transport of proinsulin out of the pancreas and into the bloodstream.
C
To stimulate transport of glucose out of the bloodstream and into the cell.
D
The transport of epinephrine from the bloodstream to the cell receptor.
Verified step by step guidance1
Understand the role of insulin: Insulin is a peptide hormone produced by the pancreas that plays a crucial role in regulating blood glucose levels.
Identify the primary function: Insulin facilitates the uptake of glucose from the bloodstream into the cells, particularly muscle and fat cells, for energy production or storage as glycogen.
Clarify the mechanism: Insulin binds to insulin receptors on the cell surface, triggering a signaling cascade that promotes the translocation of glucose transporter proteins (such as GLUT4) to the cell membrane.
Differentiate from other options: The incorrect options involve processes not directly related to insulin's primary function, such as the transport of proinsulin or epinephrine.
Summarize the correct function: The primary function of insulin is to lower blood glucose levels by promoting the uptake of glucose into cells, thus maintaining homeostasis.
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