"All or None" Is the Principle Stating That

question 99

Multiple Choice

"All or none" is the principle stating that

• A) a neuron either fires or does not fire.
• B) glial cells work either all together or not at all.
• C) all the dendrites must be receiving messages telling the neuron to fire or it will not fire at all.
• D) all somas must be receiving messages telling the neuron to fire or it will not fire at all.

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Definitions:

Spermatogenesis

The process by which male primordial germ cells undergo mitosis and meiosis to form mature sperm cells.

Secondary Sexual Characteristic

Physical traits that are not directly involved in reproduction but distinguish the sexes of a species, such as body hair in humans or plumage in birds.

Hermaphroditism

Reproduction in which a single individual produces both eggs and sperm.

Rhythm Method

A method of contraception based on avoiding intercourse during the period of a woman's cycle when she is most likely to conceive.