Which Sequence Presents Presynaptic Events in the Correct Chronological Order

question 55

Multiple Choice

Which sequence presents presynaptic events in the correct chronological order?

• A) Calcium ion influx  action potential reaches axon terminal  vesicle fuses with membrane  diffusion of neurotransmitter
• B) Exocytosis  calcium ion influx  action potential reaches axon terminal  membrane depolarization
• C) Action potential reaches axon terminal  calcium ion channels open  exocytosis  diffusion of neurotransmitter
• D) Action potential reaches axon terminal  calcium ion channels open  neurotransmitter diffusion  exocytosis

---

Definitions:

Endorsement

The act of signing the back of a financial document or negotiable instrument, thereby transferring rights or authorizing actions related to the document.

Delegatee

A third party who is not part of the original contract but to whom duties to perform are transferred by one of the contracting parties (a delegator).

Order Instrument

An instrument payable to a specific, named payee.

Instrument Payable

A written document that promises the payment of a definite amount of money either on demand or at a future date.