Question

drag the items from the bottom to the slots on the right.

ca causes release of ___ from axon terminal

neurotransmitters must cross the ___

• vesicles
• synaptic cleft

Explanation:

Identify the first physiological process

The first statement describes calcium ions (\(\text{Ca}^{2+}\)) entering the axon terminal, which triggers the exocytosis of synaptic vesicles containing neurotransmitters. Thus, calcium causes the release of neurotransmitters from vesicles in the axon terminal. The matching draggable item is "Vesicles".

Identify the second physiological process

The second statement describes what neurotransmitters must cross after being released into the synaptic gap. Neurotransmitters diffuse across the physical gap between the pre-synaptic and post-synaptic membranes, which is known as the synaptic cleft. The matching draggable item is "Synaptic cleft".

Answer:

Question 1

Ca causes release of ___ from axon terminal <blank>Vesicles</blank>

Question 2

Neurotransmitters must cross the ___ <blank>Synaptic cleft</blank>