Multiple Choice
The ability of sperm cells to move along the ductus deferens is due to ________.
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10. Cell Signaling
Introduction to Cell Signaling
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Olfactory receptors are a type of receptor called ______ that sense ______.
A
Ligand-gated ion channels; light
B
Nuclear receptors; steroid hormones
C
G protein-coupled receptors; odorant molecules
D
Receptor tyrosine kinases; hormones
Verified step by step guidance1
Understand the question: The problem is asking about the type of receptor olfactory receptors are and what they sense. This requires knowledge of receptor types and their functions in biology.
Recall the function of olfactory receptors: Olfactory receptors are specialized proteins located in the nasal epithelium that detect odorant molecules (chemical signals in the air).
Identify the receptor type: Olfactory receptors belong to the family of G protein-coupled receptors (GPCRs), which are a large class of membrane proteins that transmit signals inside the cell upon binding to specific molecules.
Eliminate incorrect options: Ligand-gated ion channels sense ions, not odorants. Nuclear receptors bind steroid hormones and regulate gene expression. Receptor tyrosine kinases are involved in hormone signaling but are not related to olfaction.
Conclude the correct answer: Based on the above reasoning, olfactory receptors are G protein-coupled receptors that sense odorant molecules.
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