THE CELL
CELL COMMUNICATION
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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: -Some signaling molecules are able to cross the plasma membrane and bind to intracellular receptors in the cytoplasm or nucleus, whereas most bind to receptors expressed on the target cell surface.
Detailed explanation-2: -So, the answer is Cortisol, testosterone.
Detailed explanation-3: -Internal receptors, also known as intracellular or cytoplasmic receptors, are found in the cytoplasm of the cell and respond to hydrophobic ligand molecules that are able to travel across the plasma membrane.
Detailed explanation-4: -Epinephrine is an amino acid derivative hormone, and follicle stimulating hormone and prolactin are protein hormones. Therefore, these hormones cannot cross the cell membrane.
There is 1 question to complete.