A myofilament is the
A. contractile thread that extends the length of the muscle fiber.
B. structural and functional unit of the skeletal muscle fiber.
C. plasma membrane of a muscle fiber.
D. protein strand composed of actin or myosin.
E. cytoplasm of a muscle fiber.
Answer: D
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Which of the following is/are possible uses of amino acids in energy production?
A. Forming intermediate molecules of carbohydrate metabolism B. Forming a ketoacid that can enter the citric acid cycle C. Forming NADH that enters the electron-transport chain D. All of the choices are correct.
A function of the hypothalamohypophysial tract is to
A. move releasing hormones from the hypothalamus to the posterior pituitary. B. carry action potentials to the posterior pituitary, causing the release of oxytocin. C. move ADH from the hypothalamus to the anterior pituitary. D. cause the release of insulin from the anterior pituitary. E. form a vascular connection from the hypothalamus to the posterior pituitary.
When oxygen binds with hemoglobin, the molecule is called _____________
Fill in the blank(s) with the appropriate word(s).
New triglycerides are constantly being synthesized and stored, while others are hydrolyzed and released into the circulation by the cells found in ________
A) transitional tissue B) adipose tissue C) blood D) reticular tissue E) fibrous connective tissue