The sarcoplasmic reticulum stores ____ when a muscle is relaxed and releases it for binding to ____ during contraction
a. calcium; troponin
b. calcium; tropomyosin
c. sodium; tropomyosin
d. potassium; tropomyosin
e. sodium; troponin
A
Anatomy & Physiology
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The most important factor affecting the pH of plasma is the concentration of
A) hydrochloric acid. B) carbon dioxide. C) organic acids. D) ketone bodies. E) lactic acid.
Anatomy & Physiology
Smooth muscle fibers are long, tapering cells with a single centrally located nucleus.
a. true b. false
Anatomy & Physiology
The lining of a capillary is called the ________.
A. pericapillary layer B. tunica adventitia C. thoroughfare layer D. adventitia E. endothelium
Anatomy & Physiology
molecule of ________ consists of all the codons needed to produce a specific polypeptide chain at the ribosome.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology