Given that cardiac output equals ____________, there are only two ways to change it: change the heart rate or change the stroke volume.
a. HR + SV
b. HR/SV
c. HR X SV
d. None of the choices is correct.
c. HR X SV
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List the steps involved in receptor-mediated endocytosis
What will be an ideal response?
Which of the following microscopic structures is only found in the cardiac muscle tissue?
a) myosin b) tropomyosin c) sarcomeres d) intercalated discs e) striations
Choose the correct description of a typical medium-sized vein.
A) In these vessels, the thin tunica media is surrounded by a thick tunica externa composed of mostly collagen fibers. B) Ranging from 2 mm to 9 mm in diameter, its thin tunica media consists of one to two layers of smooth muscle cells. C) It has a diameter of approximately 0.4 cm and has more smooth muscle cells and fewer elastic fibers. D) It ranges from 2 mm to 9 mm in diameter, and the relatively thick tunica externa has longitudinal bundles of elastic and collagen fibers. E) It has a diameter up to 2.5 cm, and its tunica media is dominated by elastic fibers rather than smooth muscle cells.
During which phase of mitosis are chromosomes aligned in the center of the cell?
A. Telophase B. Anaphase C. Metaphase D. Prophase