The blood pressure in the large systemic arteries is greatest during
A) atrial systole. B) ventricular systole.
C) atrial diastole. D) ventricular diastole.
B
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Hormones are normally secreted via ducts into the bloodstream
Indicate whether the statement is true or false
Blood cells are derived from ______________ stem cells
Fill in the blank with the correct word.
Lacking sarcomeres, smooth muscle does not have Z lines, but it does have ____________________ containing the same protein constituent found in Z lines
Fill in the blank(s) with correct word
Which of the following statements concerning veins is FALSE?
A. There is less smooth muscle and elastic tissue in veins as compared to arteries. B. Veins contain so much of the body's blood that they are considered blood reservoirs. C. Weak venous valves may result in varicose veins. D. Skeletal muscle movement and breathing movements help in returning venous blood to the heart. E. The tunica interna is the thickest tunic in veins.