Virtually all amino acid-based hormones exert their signaling effects through intracellular
calcium
deactivating ions
nucleotides
second messengers
The Correct Answer is D
a) calcium
Calcium may be a type of second messenger, but it’s not the overarching mechanism.
b) deactivating ions
This term is vague and not related to hormone signaling.
c) nucleotides
While cAMP (a nucleotide) is a second messenger, not all second messengers are nucleotides, and the option is too narrow.
d) second messengers
Amino acid-based hormones bind to surface receptors and use second messenger systems (like cAMP, IP₃, DAG) to transmit signals inside the cell.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
a) Entering the nucleus of a cell and initiating or altering the expression of a gene: Steroid hormones (e.g., cortisol, estrogen) are lipid-soluble and can pass through the cell membrane to bind intracellular receptors, influencing gene transcription.
b) Finding an appropriate cell receptor and initiating cAMP activity: This describes non-steroid hormones (e.g., catecholamines, peptide hormones) using second messenger systems, not steroids.
c) Stimulating the synthesis of glycogen: This is an effect of some hormones (e.g., insulin), but it’s not how steroid hormones act.
d) Increasing blood pressure: While some steroid hormones (like aldosterone) may affect blood pressure, this is not their mechanism of action.
Correct Answer is C,B,A
No explanation
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