The ________ valve regulates the flow of blood between the right ventricle and the vessels leading to the lungs.
A. left atrioventricular
B. mitral
C. right atrioventricular
D. pulmonary
E. aortic
Answer: D
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A monosynaptic reflex that monitors and regulates skeletal muscle length is a ________ reflex.
A. flexor B. withdrawal C. hypoactive D. stretch E. Golgi tendon
By what endocytosis process do some white blood cells engulf bacteria?
A) facilitated diffusion B) phagocytosis C) exocytosis D) pinocytosis E) filtration
Somatic motor neuron axons fall into the category of
A. A fibers. B. B fibers. C. C fibers. D. D fibers.
Arrange the following list of biochemical events in the correct sequence. (1) An action potential is conducted deep into the muscle fiber by the T tubule.(2) Calcium ions bind to troponin.(3) The membranes of the sarcoplasmic reticulum become more permeable to calcium ions.(4) Calcium ions diffuse into the sarcoplasm around the myofibril.(5) The troponin-tropomyosin complex moves exposing active sites.
A. 1, 3, 2, 5, 4 B. 1, 5, 2, 3, 4 C. 1, 4, 3, 2, 5 D. 1, 2, 3, 4, 5 E. 1, 3, 4, 2, 5