Practice question · Select all that apply
Select every statement that is TRUE about synaptic transmission.
Hints
- Two options are misconceptions - one flips what an IPSP does, one confuses diffusion with axonal conduction.
- An IPSP is INHIBITORY, and transmitter crosses the gap by DIFFUSION, not by traveling down an axon.
Show the answer
- B. Calcium entry into the terminal triggers vesicle release.
- C. Roughly as much synaptic traffic is inhibitory as excitatory.
- E. Ionotropic receptors act faster than metabotropic receptors.
Why
Inhibition is roughly as common as excitation, ionotropic beats metabotropic on speed, and Ca2+ triggers release - all true. An IPSP makes firing LESS likely, and transmitter diffuses across the cleft (it is not conducted down the axon), so those are false.
Practise Synaptic Transmission
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