ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<
ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<
20th Edition
ISBN: 9781264303090
Author: VanPutte
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 17, Problem 15RAC

When a hormone binds to a nuclear receptor
a. DNA produces mRNA.
b. G proteins are activated.
c.the hormone-receptor complex causes ion channels to open or close.
d. the cell's response is faster than when a hormone binds to a molecule bound receptor.
e. the hormone is usually a large, water-solublemolecule.

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The action of steroid hormones is different from that of peptide hormones becausea. peptide hormones must enter the cell to begin action, whereas steroid hormones must begin action on the external surface of the cell membrane.b. steroid hormones must enter the cell to begin action, whereas peptide hormones must begin action on the external surface of the cell membrane.c. peptide hormones produce a hormone receptor complex that works directly on the DNA, whereas steroid hormones cause the release of a secondary messenger that triggers enzymes.d. None of these answers is correct.
When a catecholamine or peptide hormone binds to receptors on the surface of a cell,   A. The hormone is transported to the nucleus where it alters the activity of dna. B. The cell membrane becomes less permeable. C. The cell becomes inactive. D. A second messenger appears in the cytoplasm.
What is the principal difference of endocrine system from other signaling systems?   Select one: A. Endocrine signals diffuse to neighboring target cells. B. Endocrine signals produce self-activation of the secreting cells. C. Endocrine system uses cell-cell contact to transduce signals. D. Endocrine signals are delivered by blood. E. Endocrine signals always generate faster responses in target cells.

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ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<

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