At What Point During Excitation Contraction Coupling Does Exocytosis Play

question 132

Multiple Choice

At what point during excitation contraction coupling does exocytosis play a role?

• A) during calcium ion reuptake into the sarcoplasmic reticulum
• B) when sodium channels open up on the motor end plate
• C) during acetylcholine release from the synaptic terminal
• D) when the action potential surges through the T-tubules
• E) when ATP splits into ADP and P on the free myosin head

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Definitions:

Far-Sightedness

A common vision condition, also known as hyperopia, where distant objects can be seen more clearly than near objects.

Retina

A layer of cells at the back of the eyeball containing photoreceptor cells, which convert light into electrical signals for vision.

Lens

A piece of transparent material, usually made of glass or plastic, which refracts or focuses light rays, often used in glasses, cameras, and microscopes.

Amplitude

In the context of waves, it is the height of the wave from its resting position, indicating the wave's strength or intensity.