BIO 220 Topic 6 Graded Quiz Latest



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BIO 220 Topic 6 Graded Quiz Latest

BIO 220 Topic 6 Graded Quiz Latest


BIO 220 Topic 6 Graded Quiz Latest

Question 1

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

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

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

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

The auditory tubes open into the

a. fauces.

b. oropharynx.

c. nasopharynx.

d. laryngopharynx.

e. nasal cavity.

Question 4

Which of the following statements regarding the lungs is?

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

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

a. carbon dioxide

b. hemoglobin

c. carbonic anhydrase

d. water

e. bicarbonate ion

Question 6

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

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

Question 7

A protective function of the respiratory system would be

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

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

a. expiratory reserve volume.

b. tidal volume.

c. inspiratory reserve volume.

d. vital capacity.

e. residual volume.

Question 9

During exercise, the oxygen-hemoglobin dissociation curve

a. shifts to the right.

b. shifts to the left.

c. doesn’t shift.

Question 10

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

a. exercise

b. pulmonary edema

c. increased heart rate

d. increased respiration rate

e. None of these choices is .

Question 11

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

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

The Hering-Breuer reflex

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

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

a. epiglottis.

b. thyroid cartilage.

c. cricoid cartilage.

d. arytenoid cartilage.

e. the “Adam’s apple”.

Question 14

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

a. paranasal sinuses

b. auditory tubes

c. lacrimal glands

d. fauces e. epiglottis

Question 15

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

a. Hering-Breuer reflex.

b. aerobic threshold.

c. anaerobic threshold.

d. lactic acid tolerance level.

Question 16

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

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

Most carbon dioxide is transported in the blood

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

What does “D” represent on the diagram?

a. larynx

b. lungs

c. trachea

d. pharynx

e. bronchi

Question 19

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

a. vocal folds

b. vestibular folds

c. cricothyroid ligaments d. epiglottic folds

e. vocal folds and vestibular folds

Question 20

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

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 .