Ventilation refers to the
A. movement of air into and out of the lungs.
B. gas exchange between the blood and the tissues.
C. transportation of oxygen and carbon dioxide in the blood.
D. gas exchange between the air in the lungs and the blood.
E. respiration at the cellular level.
A
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What gland secretes oil to prevent the eyelids from sticking together?
A) ceruminous gland B) sudoriferous gland C) tarsal gland D) lacrimal gland
The pseudostratified columnar epithelium of the bronchi in smokers may transform into stratified squamous epithelium. This is an example of ________
A) metaplasia B) atrophy C) differentiation D) hyperplasia E) neoplasia
A chemical change in which structure prevents polyspermy fertilization?
a. sperm b. acrosome c. ovaries d. zona pellucida e. corpus luteum
The cheek area is known as the ________ region.
Fill in the blank(s) with the appropriate word(s).