The enzyme that harnesses the energy of H+ diffusion down its concentration gradient within a mitochondrion to make high-energy molecules for the cell is

A.  ATP phosphatase.
B.  ATP synthetase.
C.  pyruvate decarboxylase.
D.  succinic dehydrogenase.
E.  creatine phosphatase.


B

Anatomy & Physiology

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The structure of a testis can be described as composed of

A. about 250 lobules, each of which contains 1 to 4 seminiferous tubules. B. a single very long seminiferous tubule that winds through the structure. C. semen in various stages of development held in seminiferous tubules. D. 1 to 4 lobules, each of which contains about 250 seminiferous tubules.

Anatomy & Physiology

Epithelial tissue tends to be richly innervated and highly regenerative.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

Smooth muscle contractions help to propel sperm in the

A. rete testis. B. ductus deferens. C. seminal receptacle. D. seminiferous tubule. E. ejaculatory duct.

Anatomy & Physiology

Valves similar to the semilunar valves of the heart are found in medium and large ________.

A. venules B. arterioles C. capillaries D. arteries E. veins

Anatomy & Physiology