In Neurons, the Synaptotagmin-1 Protein Is Localized to Presynaptic Axon

question 10

Multiple Choice

In neurons, the synaptotagmin-1 protein is localized to presynaptic axon terminals. When activated, it facilitates the fusion of neurotransmitter-containing synaptic vesicles to the plasma membrane, leading to neurotransmitter release into the synaptic cleft. Which of the following would you expect to directly activate synaptotagmin-1 for this function?

• A) Binding to Mg²⁺
• B) Binding to Ca²⁺
• C) Binding to phosphatidylcholine
• D) Binding to K⁺
• E) Binding to the K⁺ leak channels

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Definitions:

Cytokine

Small proteins released by cells that affect the behavior of other cells, significant in immune responses.

Tumor Necrosis Factor

A cell signaling protein (cytokine) involved in systemic inflammation, playing a role in the regulation of immune cells.

Defense Responses

Biological processes activated in response to threats like pathogens or physical injury to protect an organism.

Cytokines

Small proteins released by cells that have a specific effect on the interactions and communications between cells, often playing pivotal roles in immune responses.