All but one of the following is a function of the low pH found in the stomach. Select the description below that does not reflect a role of stomach acid
A) The stomach's acid catabolically breaks down food stuffs in preparation for absorption.
B) Stomach acid denatures proteins making the poly peptide chain more accessible to pepsin digestive enzymes.
C) Many potentially harmful bacteria will be prevented entry to the small intestine by stomach acid.
D) Low pH converts pepsinogen to its active form of pepsin, preventing the protease enzyme from digesting the cells that produce it.
A
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Vitamin A's maintenance of healthy epithelial tissues is important because these tissues ________
Fill in the blank(s) with correct word
Asthma is
A) a collapsed lung resulting from insufficient production of surfactant. B) due to an excessive stimulation of smooth muscle in bronchioles. C) an obstructive tumor targeting primarily the terminal bronchioles. D) characterized by fluid buildup in the alveoli. E) caused by Mycobacterium tuberculosis.
The cells involved in cell-mediated immunity are ________.
A. macrophages B. neutrophils C. lymphocytes D. monocytes
In humans, the only cell that bears a flagellum is the ________ cell
A. kidney B. oocyte C. red blood D. brain E. sperm