CONNECTIVE TISSUE GLAND
ENDOCRINE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which signaling molecules can cross the cell membrane on their own and do not need to bind to receptor proteins?
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steroid hormones (nonpolar lipids)
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ions (small, very polar)
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glucose (large and polar)
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protein hormones (large and polar)
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Explanation:
Detailed explanation-1: -The ligand crosses the plasma membrane and binds to the receptor in the cytoplasm. The receptor then moves to the nucleus, where it binds DNA to regulate transcription.
Detailed explanation-2: -Which of the following signal molecules does not interact with cell surface receptors? Sol: (d) Testosterone.
Detailed explanation-3: -Paracrine signaling Often, cells that are near one another communicate through the release of chemical messengers (ligands that can diffuse through the space between the cells). This type of signaling, in which cells communicate over relatively short distances, is known as paracrine signaling.
There is 1 question to complete.