During stress, elevated levels of plasma cortisol stimulate the catabolism of muscle protein and the conversion of alpha-keto acids to glucose in the liver
Indicate whether the statement is true or false.
TRUE
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When a cyclist rounds a curve, where does centripetal force act?
A. on the cyclist's center of gravity B. on the cycle's center of gravity C. on the tires of the cycle D. on the ground
Which of the following lists examples of body structures from the simplest to the most complex?
A. Protein, stomach, connective tissue, adipocyte (fat cell), mitochondrion B. Mitochondrion, connective tissue, protein, stomach, adipocyte (fat cell) C. Protein, adipocyte (fat cell), stomach, connective tissue, mitochondrion D. Protein, mitochondrion, adipocyte (fat cell), connective tissue, stomach E. Mitochondrion, connective tissue, stomach, protein, adipocyte (fat cell)
A sarcomere is the
A. cell membrane of a muscle fiber. B. cytoplasm of muscle cells. C. structural and functional unit of the skeletal muscle cell. D. contractile thread that extends the length of the muscle fiber. E. protein strand composed of actin or myosin.
The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the ________
A) rete testis B) pampiniform plexus of veins C) epididymis D) scrotal portal system E) blood-testis barrier