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.
D
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In at least some vertebrates, a small region of the caudal medulla called the __________ is essential for respiratory rhythm generation
Fill in the blank with the correct word.
The specialized sarcolemma that contains acetylcholine receptors is the
A) synaptic knob. B) motor end plate. C) motor unit. D) synaptic cleft. E) I band.
The main process by which exchange of solutes occurs between the blood and interstitial fluid at the capillary level is passive diffusion down concentration gradients
Indicate whether the statement is true or false
The cervical region is the
A. calf. B. armpit. C. hollow behind the knee. D. neck. E. thigh.