Which of the Following Must Happen First in the Order

question 52

Multiple Choice

Which of the following must happen first in the order events at a chemical synapse?

• A) Neurotransmitter binds to receptors on the postsynaptic neuron.
• B) Ion channels respond to the neurotransmitter and lead to a local potential, or possibly an action potential.
• C) Calcium ion channels in the axon terminal open.
• D) Calcium ions cause synaptic vesicles to release neurotransmitters into the synaptic cleft.

---

Definitions:

Venomous Snakes

Reptiles capable of injecting venom through their bite, which can be harmful or lethal to humans.

Enjoy Snakes

A positive attitude or feeling of pleasure derived from interactions with or observations of snakes.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with an unconditioned stimulus, triggers a conditioned response.

White Rat

Commonly used in psychological experiments, particularly in studies involving conditioning and behavior.