At the onset of exercise when the small ATP reserve in muscle fibers is quickly depleted, _____ occurs next.
A. direct phosphorylation of ADP
B. production of ATP by aerobic respiration
Answer: A. direct phosphorylation of ADP
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The major components of the lymphatic system include the __________.
a. thoracic duct, right lymphatic duct, and lymph nodes b. spleen, thymus, and tonsils c. lymph nodes, lymph, and lymphocytes d. lymphatic vessels, lymph, and lymphatic organs
Which of the following is a component of semen?
a. Sperm b. Epididymal fluid c. Prostatic fluid d. Bulbourethral fluid e. Seminal fluid
The trapezius muscle may be separated into all of the following groups, except __________.
A. lateral B. superior C. middle D. inferior
The model that describes the contraction of the muscle is called the
A. contraction cycle. B. power stroke. C. sliding filament model. D. slipping fibril mechanism. E. paddle model.