What are membrane bound receptors?

Multiple choice: Which one of the following receptors does not span the cell membrane seven times?

  • a. β-adrenergic receptors b. rhodopsin c. 5-HTic receptor d. mineralocorticoid receptors e. LH receptors

  • Answer:

    The answer is D. The mineralocorticoid receptor is found inside the cell, in the cytoplasm, and translocates to the nucleus when activated. The rest of the choices are all transmembrane (membrane-crossing) receptors that are coupled to G-proteins. The main feature of G-protein coupled receptors is that they cross the membrane seven times.

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