In skeletal muscle, when calcium binds to the regulatory protein troponin, it increases the affinity of neighboring troponin molecules for calcium. This is an example of
A. allosteric modulation.
B. cooperativity.
C. covalent modulation.
D. phosphorylation.
E. saturation.
B
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Of the following list, which describe the functions of the paranasal sinuses?
a: Warm and moisten inhaled air b: Strengthen the bone c: Provide resonance to the voice A. a, b, and c B. None of the listed functions describe those of the sinuses. C. a only D. b only E. a and c
Residual volume is the volume of air __________.
a. that remains in the lungs after maximal expiration b. at the end of normal respiration if expiratory muscles are actively contracted c. inspired and expired during one breath d. that can be inspired over and above resting tidal volume
Explain the role of glycogen in cellular metabolism
A) It is the primary fuel that enters glycolysis. B) It is the primary fuel that enters the citric acid cycle. C) It is the primary fuel that enters the electron transport chain. D) It serves as an intracellular glucose reserve. E) It can easily be converted to other non-carbohydrate fuel sources.
Which of the following is not a function of the muscular system?
A. Breathing B. Heat production C. Secretion D. Control of openings E. Stability