What prevents food from entering the trachea during swallowing?
a. elevation of the uvula
b. contraction of the pharyngeal muscles
c. positioning of the tongue
d. tight apposition of the vocal cords over the glottis
e. elevation of the epiglottis over the pharyngoesophageal sphincter
D
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Substances that are able to pass directly through the phospholipid bilayer are lipids, lipid-soluble molecules, and ______, such as O2 and CO2.
Fill in the blank(s) with the appropriate word(s).
What three bones form the coxal bone?
A) ilium, ischium, sacrum B) ilium, ischium, pubis C) ilium, ischium, coccyx D) None of the listed responses is correct.
Cells that are responsible for producing skin color are called ____
a. keratinocytes b. melanocytes c. fibroblasts d. Meissner's corpuscles
The enzyme(s) called ________ break(s) down the substrate called ________.
A. nucleases; nucleotides B. peptidases; proteins C. lactose; lactase D. lipases; micelles E. lactase; glucose