An Axonal Growth Cone Has Reached a Muscle Fiber and Is

question 53

Multiple Choice

An axonal growth cone has reached a muscle fiber and is forming a neuromuscular junction. Which of the following events does NOT normally occur in this process?

• A) Agrin secreted from the growth cone serves as a signaling molecule affecting the muscle cell.
• B) LRP4 on the surface of the growth cone serves as a signaling molecule affecting the muscle cell.
• C) Synaptic vesicles containing the neurotransmitter acetylcholine appear in the growth cone.
• D) Acetylcholine receptors cluster on the muscle cell plasma membrane at the junction.
• E) A thin layer of basal lamina forms at the cleft between the two cell membranes at the junction.

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Definitions:

Discount Factor

A multiplier used to determine the present value of future cash flows, reflecting the time value of money.

Rate Of Return

The gain or loss of an investment over a specified period, expressed as a percentage of the investment's cost.

Profitability Index

A calculation used to assess the relative profitability of an investment, computed as the present value of future cash flows divided by the initial investment cost.

Present Value

The current value of a future sum of money or stream of cash flows, discounted at a specific interest rate.