Which of the following uses the ligand gated ion channels.
A. Photons of light activating an ion channel with photoreceptors of the retina.
B. Hair cells in the cochlea vibrate in response to sound to activate an ion channel.
C. In the spike initiation zone, or axon hillock, the membrane potential becomes sufficiently depolarized to activate an action potential.
D. GABA is released from vesicles of the presynaptic terminal causing an increase in chloride ions on the post synaptic membrane.
Select your answer:
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Enzymes › ViewHow specific are enzymes to substrates?
A. Enzymes are not specific; they can attach to any substrate.
B. Enzymes are specific to one type of substrate.
C. Enzymes are specific to multiple types of substrates.
D. Enzymes randomly select substrates to act upon.
Enzymes › View
What happens to the enzymes during a chemical reaction they catalyze?
A. They are used up
B. They are not used up
C. They are converted to a different enzyme
D. They increase in concentration