Question 16 (4 points) During development, stem cells receive many signals in the form of soluble growth factors released from neighboring cells. This is an example of ________. Autocrine signaling Paracrine signaling Determinative signaling Excitatory signaling Endocrine signaling
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Step 1: Paracrine signaling is a type of cell signaling where a cell secretes a signaling molecule that acts on nearby cells. Show more…
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Which of the following is a correct description of paracrine and endocrine cell signaling? Paracrine signals function outside of ECF while endocrine signals function inside of ECF. Both paracrine and endocrine signals travel via the blood, but paracrine signals only affect cells near the secreting cell. Paracrine signals bind to all cells, while endocrine signals only bind to target cells. Paracrine signals travel via simple diffusion through interstitial fluid, while endocrine signals travel via the blood.
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Match each scenario to the correct type of cell signaling: 1) Paracrine signaling 2) Endocrine signaling 3) Autocrine signaling 4) Signaling across gap junctions In the immune system, when interleukin-1 is produced in response to external stimuli, it can bind to cell-surface receptors on the same cell that produced it. The kidneys produce calcitriol, which stimulates the absorption of Ca2+ by the small intestines and ensures the availability of Calcium for bone growth. Estrogens produced in the ovaries are crucial for the maturation of ovarian follicles before ovulation. In the heart, the signal to contract is passed efficiently through gap junctions, allowing the heart muscle cells to contract in unison.
A signaling molecule is located or fixed on the surface of a cell and interacts only with receptors on neighboring cells. What kind of signaling is most likely being described? Paracrine signaling Cytosolic Sharing Endocrine signaling Juxtacrine/Contact-dependent signaling Autocrine signaling
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