An individual's hematocrit is dependent on his or her
A. sex.
B. altitude.
C. age.
D. All of the choices are correct.
Answer: D
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ATP is important to cellular processes because it
A. releases oxygen when high-energy phosphate bonds are broken. B. provides energy for cellular work when the terminal, high-energy bond is broken. C. is a by-product of all catabolic reactions. D. is formed by muscles contracting or whenever cellular work occurs.
A myelinated nerve fiber is ______, whereas an unmyelinated nerve fiber is ______
A) gray, and composing the gray matter of the brain and spinal cord; white, and composing the white matter of the brain and spinal cord B) white, and composing the gray matter of the brain and spinal cord; red, and composing the white matter of the brain and spinal cord C) white, and composing the gray matter of the brain and spinal cord; gray, and composing the white matter of the brain and spinal cord D) white, and composing the white matter of the brain and spinal cord; gray, and composing the gray matter of the brain and spinal cord
Micturition is a synonym for ________
A) urinary frequency B) incontinence C) full bladder D) emptying the bladder
Many nephrons empty into a ________
A) renal tubule B) columnar duct C) microcalyx D) collecting duct