1. Which of the following occurs in situations where more than one hormone produces the same effects at the target cell and their combined effects are amplified?
Synergism
Permissiveness
Antagonism
Organism
2. Which of the following hormones has intracellular receptors?
epinephrine
insulin
cortisol
3.What is the mechanism of action of lipid-soluble hormones?
increasing protein kinases
activation of genes, which increases protein synthesis in the cell
phosphorylation of intracellular proteins
4. After a lipid-soluble hormone is bound to its intracellular receptor, what does the hormone complex do?
acts as a transcription factor and binds to DNA, activating a gene
directly alters protein synthesis at the ribosome
phosphorylates a protein
activates a protein kinase
5. Which hormone’s receptor is always bound to DNA, even when the receptor is empty?
insulin
cortisol
thyroid hormone
6. What keeps intracellular receptors from binding to DNA before a hormone binds to the receptor?
transcription factors
chaperone proteins (chaperonins)
Receptors can’t enter the nucleus until the hormone is bound to it.
7. Hormones that regulate the secretory action of other endocrine glands are called ____________.
somatotropin
tropins
somatostatins
GHIH
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