Question 1

2.50 points out of 2.50

Question text

Which of the following events in the chloride shift occurs
last?

Select one:

a. Carbon dioxide
diffuses into a red blood cell.

b. Carbonic acid
dissociates to form bicarbonate and hydrogen ions.

c. Bicarbonate ions
diffuse into the plasma.

d. CO2 and H2O ?
H2CO3

e. Carbonic acid
dissociates to form water and carbon dioxide.

Question 2

2.50 points out of 2.50

Question text

Why is transfused blood discarded after about 6 weeks of
storage?

Select one:

a. It can not bind to
oxygen anymore.

b. It becomes too
thick.

c. The BPG levels are
too low for adequate release of oxygen to tissues.

d. The percent oxygen
saturation is too low.

Question 3

2.50 points out of 2.50

Question text

The auditory tubes open into the

Select one:

a. fauces.

b. oropharynx.

c. nasopharynx.

d. laryngopharynx.

e. nasal cavity.

Question 4

2.50 points out of 2.50

Question text

Which of the following statements regarding the lungs is ?

Select one:

a. The left lung is
larger than the right lung.

b. The left lung
contains two lobes while the right lung contains three lobes.

c. The left lung has
more bronchopulmonary segments than the right lung.

d. Only the right
lung has a hilum.

e. The left lung
contains three lobes while the right lung contains two lobes.

Question 5

2.50 points out of 2.50

Question text

Which of the following molecules acts as a buffer during the
chloride shift?

Select one:

a. carbon dioxide

b. hemoglobin

c. carbonic anhydrase

d. water

e. bicarbonate ion

Question 6

2.50 points out of 2.50

Question text

Which of the following individuals will have the highest
vital capacity?

Select one:

a. a well-trained
athlete (male or female)

b. a middle-aged,
short female

c. an 80-year-old
male

d. a young, obese
male

e. an adult female

The answer is: a
well-trained athlete (male or female)

Question 7

2.50 points out of 2.50

Question text

A protective function of the respiratory system would be

Select one:

a. altering blood pH
by changing blood CO2 levels.

b. olfaction by
drawing molecules into the nasal cavity.

c. producing ACE
which helps regulate blood pressure.

d. preventing
microorganisms from entering the body.

Question 8

2.50 points out of 2.50

Question text

Mr. Huff and Puff exhales normally; then, using forced
expiration, he exhales as much air as possible. The volume of air still
remaining in his lungs is called

Select one:

a. expiratory reserve
volume.

b. tidal volume.

c. inspiratory
reserve volume.

d. vital capacity.

e. residual
volume.

Question 9

2.50 points out of 2.50

Question text

During exercise, the oxygen-hemoglobin dissociation curve

Select one:

a. shifts to the
right.

b. shifts to the
left.

c. doesn’t shift.

Question 10

2.50 points out of 2.50

Question text

Which of the following results in an increase in shunted
blood (blood not completely oxygenated)?

Select one:

a. exercise

b. pulmonary
edema

c. increased heart
rate

d. increased
respiration rate

e. None of these
choices is .

Question 11

2.50 points out of 2.50

Question text

The olfactory epithelium responsible for the sense of smell
is located in the

Select one:

a. floor of the nasal
cavity.

b. wall of the nasal
septum.

c. lining of the
nasopharynx.

d. cavity of the
paranasal sinuses.

e. roof of the nasal
cavity.

Question 12

2.50 points out of 2.50

Question text

The Hering-Breuer reflex

Select one:

a. causes erratic
respirations.

b. helps prevent
overinflation of the lungs.

c. has its sensory
components in the sympathetic nerves.

d. is a normal
response to increased oxygen content in the blood.

e. limits how much
air a person can expire.

Question 13

2.50 points out of 2.50

Question text

During swallowing, the opening into the larynx is covered by
the

Select one:

a. epiglottis.

b. thyroid cartilage.

c. cricoid cartilage.

d. arytenoid
cartilage.

e. the “Adam’s
apple”.

Question 14

2.50 points out of 2.50

Question text

Which of the following structures opens directly into the
nasal cavity?

Select one:

a. paranasal
sinuses

b. auditory tubes

c. lacrimal glands

d. fauces

e. epiglottis

Question 15

2.50 points out of 2.50

Question text

The highest level of exercise that can be performed without
causing a significant change in blood pH is called the

Select one:

a. Hering-Breuer
reflex.

b. aerobic threshold.

c. anaerobic
threshold.

d. lactic acid
tolerance level.

Question 16

2.50 points out of 2.50

Question text

A patient has severe pneumonia, which has thickened the
respiratory membrane. Despite oxygen therapy, he still has rapid respiration
and feels as if he is not getting enough air. This is because

Select one:

a. the oxygen
increases the stimulation of the carotid and aortic bodies.

b. the oxygen
stimulates the respiratory center to increase the respiratory rate.

c. his blood pH
increased and stimulated an increase in his respiratory rate.

d. even though he is
receiving enough oxygen, carbon dioxide and hydrogen ions accumulate in his
blood and cause the respiratory rate to continue to increase.

e. oxygen cannot
diffuse across the thickened membrane.

Question 17

2.50 points out of 2.50

Question text

Most carbon dioxide is transported in the blood

Select one:

a. in the form of
bicarbonate ions.

b. bound to
hemoglobin.

c. dissolved in the
plasma.

d. by the leukocytes.

e. in the form of
carbonic acid.

Question 18

2.50 points out of 2.50

Question text

What does “D” represent on the diagram?

Select one:

a. larynx

b. lungs

c. trachea

d. pharynx

e. bronchi

Question 19

2.50 points out of 2.50

Question text

When these ligaments or folds come together, they prevent
food from entering the lower respiratory tract.

Select one:

a. vocal folds

b. vestibular folds

c. cricothyroid
ligaments

d. epiglottic folds

e. vocal folds and
vestibular folds

Question 20

2.50 points out of 2.50

Question text

For air to flow into or out of the lungs, there must be

Select one:

a. a volume gradient
established between the atmosphere and the alveoli.

b. a temperature
gradient between the atmosphere and the alveoli.

c. a pressure
gradient established between the atmosphere and the alveoli.

d. a diffusion
gradient between the atmosphere and the alveoli.

e. None of these
choices is .