Two gases contribute to 99% of the total atmospheric pressure. They are ______.
A. CO2 and O2
B. N and O2
C. CO2 and H2O vapor
D. N and CO2
Answer: B. N and O2
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Male reproductive functions are controlled mainly by hormones from the hypothalamus
and the A) anterior pituitary gland and testes. B) posterior pituitary and adrenal glands. C) anterior pituitary and adrenal glands. D) posterior pituitary gland and testes.
Cells forming the brain capillaries are joined by tight junctions that completely seal the capillary wall
Indicate whether the statement is true or false
In the spinal cord, nerve tracts or funiculi make up the:
A) white columns. B) gray horns. C) central canal. D) gray commissure.
________ = respiratory rate × (tidal volume - anatomic dead space)
A) Vital capacity B) Respiratory minute volume C) Pulmonary ventilation rate D) Alveolar ventilation rate E) External respiration rate