Both long-term potentiation and long-term depression require the release of ________ from the postsynaptic neuron membrane.

A. Ca2+
B. K+
C. Mg2+
D. Cl-


Answer: A

Anatomy & Physiology

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These cells begin the second mitotic division in spermatogenesis

A) primary spermatocytes B) spermatogonia C) spermatids D) secondary spermatocytes

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The aortic valve prevents backflow of blood from entering the left ventricle during ventricular diastole

Indicate whether the statement is true or false

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A cell whose job is to detoxify harmful or poisonous substances such as alcohol would have many:

A) nuclei B) peroxisomes C) lysosomes D) rough endoplasmic reticulum E) flagella

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The hormone mainly responsible for the development and maintenance of female secondary sexual characteristics is

A) luteinizing hormone. B) progesterone. C) estrogen. D) androgen.

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