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

Anatomy & Physiology

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List the steps involved in receptor-mediated endocytosis

What will be an ideal response?

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During which phase of mitosis are chromosomes aligned in the center of the cell?

A. Telophase B. Anaphase C. Metaphase D. Prophase

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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

Anatomy & Physiology

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.

Anatomy & Physiology