Respiratory Supplemental Test Review Assignment - Assignment #12 Flashcards
The majority of carbon dioxide is transported in plasma as:
bicarbonate ion
Which of the following statments about CO2 is INCORRECT?
Question 2 options:
When it accumulates in the blood, pH will decrease
Hypoventilation increases its concentration in the blood
Concentration of CO2 is greater in systemic venous blood than pulmonary venous blood.
There is more CO2 dissolved in the blood plasma than is carried in the RBCs.
There is more CO2 dissolved in the blood plasma than is carried in the RBCs.
The chemoreceptors in the aorta are most sensitive to changes in blood:
Question 3 options:
H+ concentration
HCO3- concentration
CO2 concentration
O2 concentration
O2 concentration
During normal breathing, what is the stimulus for increasing breathing rate and depth?
increased carbon dioxide levels in the blood
Why are the effects of CO2 and H+ on breathing are similar?
Question 5 options:
both cause a reduction in O2 concentration. x
both are positively charged ions
both elevate pH levels
CO2 combines with water to form H2CO3 which releases H+
H+ combines with water to form CO2 X
CO2 combines with water to form H2CO3 which releases H+
The amount of oxygen released from hemoglobin increases:
Question 6 options:
during hypercapnia
when CO2 concentration increases
if pyrogens are released
if blood becomes more acidic
all of the above
all of the above
The dorsal and ventral respiratory groups are located in the:
Question 7 options:
cerebellum
hypothalamus
medulla oblongata
pons
thalamus
medulla oblongata
Match the following pressures with their correct location on the diagram below. Answers may be used once, more than once, or not at all.
The partial pressure of carbon dioxide at point D. 1
The partial pressure of carbon dioxide as blood comes in at point C. 2
The partial pressure of oxygen at point B. 4
Cutting the phrenic nerve will result in:
Question 9 options:
Air entering the pleural cavity
Paralysis of the diaphragm
Stimulation of the diaphragmatic reflex
Paralysis of the epiglottis
Paralysis of the diaphragm
Which brain cell respiratory center is thought to generate the respiratory rhythm?
Question 10 options:
pontine respiratory group
dorsal respiratory group
ventral respiratory group
ventral respiratory group
The primary force responsible for air moving into the lungs during inhalation is:
Question 11 options:
muscular contraction
atmospheric pressure
reduced surface tension inside the lungs
muscular relaxation
atmospheric pressure
Even after the most forceful exhalation, a certain volume of air remains in the lungs. This volume is called the
residual volume
The basic rhythm of breathing is controlled by which portion of the brain.
Question 13 options:
peripheral chemoreceptors
pneumotaxic area
dorsal respiratory group of the medullary rhythmicity center x
ventral respiratory group of the medullary rhythmicity center
ventral respiratory group of the medullary rhythmicity center
Within the blood, oxygen is primarily transported _________________ while the bulk of carbon dioxide is transported ____________________.
Question 14 options:
as oxyhemoglobin; as bicarbonate ions
dissolved in the plasma; as carbaminohemoglonin
as deoxyhemoglobin; as carbaminohemoglobin
in association with hemoglobin; as carbon dioxide dissolved in the plasma
as oxyhemoglobin; as bicarbonate ions
Whether oxygen diffuses from the alveoli into the blood or not is dependent upon:
Question 15 options:
the partial pressure of oxygen and carbon dioxide in the blood
the partial pressure of oxygen in the lungs only
the partial pressure of oxygen in the lungs and in the blood
the partial pressure of all gases in the atmosphere and blood
the partial pressure of oxygen in the lungs and in the blood
