Which of the Following Is the Final Signaling Step Following

question 85

Multiple Choice

Which of the following is the final signaling step following impulse conduction along the axon terminal?

• A) ACh binds with receptors on the muscle cell membrane, opening sodium channels.
• B) ACh diffuses across the cleft of the junction.
• C) ACh is released by exocytosis.
• D) Calcium diffuses into the terminal button.
• E) Voltage-gated channels for calcium are opened.

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Definitions:

Polygenically Determined

Traits or characteristics that result from the combined effect of multiple genes rather than a single gene.

Phenotype

The set of observable characteristics of an organism resulting from the interaction of its genotype with the environment.

Double Helix

The structure formed by double-stranded molecules of nucleic acids such as DNA, characterized by two helical chains coiled around the same axis.

Estrogen

A group of steroid hormones which promote the development and maintenance of female characteristics of the body.