Human Physiology Unit 04 Review A Respiratory Question Preview (ID: 37867)


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Carbon monoxide is lethal because it
a) irreversibly binds to hemoglobin
b) increases CO2, resulting in acidosis
c) increases CO2, resulting in alkalosis
d) fools CO2 receptors, slowing respiratory rate

The volume of gas inspired or expired in a quiet respiration cycle is the
a) tidal volume
b) inspiratory reserve volume
c) vital capacity
d) median respiratory capacity

The direct role of blood oxygen levels in controlling respiration is called
a) hypoxic drive
b) hypocapnea
c) acidosis
d) perfusion

The exchange of chloride ions for bicarbonate through tissue capillaries is called the
a) chloride shift
b) Bohr effect
c) acidosis
d) carbonic drift

Which of the following is NOT part of the conducting zone
a) alveoli
b) trachea
c) larynx
d) segmental bronchioles

The enzyme ________ catalyzes the formation of H2CO3 from CO2 and water
a) carbonic anhydrase
b) renin
c) nitric oxide synthase
d) lactate dehydrogenase

Normal VENOUS PO2 is
a) 40 mm Hg
b) 100 mm Hg
c) 120 mm Hg
d) 20 mm Hg

The volume of gas remaining in the lungs after a maximum expiration is the
a) residual volume
b) tidal volume
c) vital capacity
d) respiratory reserve volume

Renal production of ________ is stimulated by hypoxemia
a) erythropoeitin
b) thrombocytes
c) renin
d) Colony Stimulating Factor

The affinity of hemoglobin for oxygen
a) is increased due to metabolic alkalosis
b) is greater than its affinity for carbon monoxide
c) decreases with altitude above sea level
d) is the same as that of myoglobin

Hypoventilation can compensate for
a) respiratory alkalosis
b) metabolic alkalosis
c) respiratory acidosis
d) metabolic acidosis

Diffusion rate across the respiratory membrane is rapid because
a) all of the rest are correct
b) alveoli are one cell thick
c) the air-blood barrier is two cells thick
d) the alveolar epithelium and the capillary endothelium share a fused basement membrane

Respiratory Distress Syndrome (RDS) is a condition associated with premature babies who lack
a) pulmonary surfactant
b) pulmonary histamine receptors
c) type I alveolar cells
d) alveolar basement membrane

The primary drive to breathe is elicited by which of the following
a) INCREASED pCO2
b) DECREASED pCO2
c) INCREASED pO2
d) DECREASED pO2

The rhythmicity center is located in the
a) medulla oblongata
b) cerebral cortex
c) dorsal ramus
d) substantia nigra

inspiration is initiated by contraction of
a) diaphragm
b) external intercostals
c) scalene muscles
d) rectus abdominus

Which of the following is NOT a function of the conducting zone?
a) gas exchange
b) air conditioning
c) defense
d) sound production

Carbon dioxide ________ oxygen unloading and oxygen unloading ________ carbon dioxide transport.
a) increases, facilitates
b) decreases, hinders
c) increases, hinders
d) decreases, facilitates

During inspiration
a) intrapulmonary pressure is less than atmospheric pressure
b) transpulmonary pressure increases
c) alveolar pressure exceeds atmospheric pressure
d) the diaphragm relaxes

exchange of gas between air and blood is ___, while exchange of gas between blood and cells is ___
a) external respiration, internal respiration
b) neccesary, optional
c) voluntary, involuntary
d) internal respiration, cellular respiration

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