During the embryonic developmental stage, skeletal muscle fibers are derived from:
a. fibroblasts
b. lymphoblasts
c. connective tissue
d. myoblasts
e. microfilaments
d
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The digestion of a cell by its own enzymes is called ________.
Fill in the blank(s) with the appropriate word(s).
Gas exchange occurs in all of the following EXCEPT:
A) terminal bronchioles. B) alveolar ducts. C) respiratory bronchioles. D) alveolar sacs.
During exchange at the capillaries, what can cross the endothelial cells, diffusing through the plasma membranes?
A. Proteins B. Large water-soluble substances C. Hormones D. Red blood cells E. Lipid-soluble substances
what does the term "depressor" refer to in the name depressor labii inferioris?
a) the location of the muscle b) the shape of the muscle c) the length of the muscle d) the action of the muscle