As sound levels increase in the spiral organ (of Corti), ________.
A) outer hair cells stiffen the basilar membrane
B) outer hair cells bend the cilia away from the kinocilium
C) inner hair cells stiffen the basilar membrane
D) inner hair cells bend the cilia away from the kinocilium
A) outer hair cells stiffen the basilar membrane
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An antigen can be a:
a. toxin b. protein on a cancer cell membrane c. protein on a bacterial cell membrane d. all of the above
The neurotransmitter released at terminal ganglia is ________.
A. dopamine B. acetylcholine C. epinephrine D. norepinephrine
Hormones act through binding to their receptors. Which of following hormones only binds to a receptor located on the cell membrane?
A. thyroid hormone B. catecholamine C. estrogen D. progesterone E. vitamin D
Channels that open or close in response to changes in the electrical charge or voltage across the plasma membrane are called
A. ligand-gated ion channels. B. leak ion channels. C. relegated ion channels. D. voltage-gated ion channels. E. obligated ion channels.