Heart tissue is nourished by
the SA node.
the blood passing through the chambers of the heart.
the chordae tendineae.
blood in the coronary blood vessels (i.e., through the coronary arteries to capillaries).
blood vessels (i.e., through the coronary arteries to capillaries).
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Tetrapods have two circuits within their circulatory system. The one that pushes blood through the lungs is called the
A) Pulmonary circuit. B) Systemic circuit. C) Capillary circuit. D) Aortic circuit.
The descending limb of the nephron loop ________
A) is not permeable to water B) is freely permeable to sodium and urea C) contains fluid that becomes more concentrated as it moves down into the medulla D) pulls water by osmosis into the lumen of the tubule
Protein digestion begins in the:
a. mouth b. stomach c. small intestine d. large intestine
The ____________________ or ____________________ of a nerve cell is a single, elongated tubular process that conducts action potentials away from the cell body and eventually terminates at other cells
Fill in the blank(s) with correct word