Exam 3 Practice Questions Flashcards

1
Q

What does the lymphatic system do?

A

-provides a structural basis for the immune system
-returns interstitial fluid to the vascular system

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2
Q

How does interstitial fluid enter the lymphatic capillaries?

A

passive opening of flaplike minivalves

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3
Q

Where are mucosa associated lymphoid tissue found?

A

-the pharynx
-small intestine
-the appendix

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4
Q

Human immunodeficiency virus (HIV) disables the immune system by:

A

destroying helper T cells

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5
Q

Which of the following has the highest oxygen pressure?

A

the alveoli

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6
Q

Which of the following has the highest carbon dioxide pressure?

A

the tissues of the body

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7
Q

Which of the following is the correct sequence of respiratory organs that the air passes through on its way to the alveoli?

A

pharynx, larynx, trachea, bronchi, bronchioles, alveoli

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8
Q

The alveoli are cleaned by:

A

macrophages

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9
Q

The respiratory membrane is

A

fused membranes of alveolar and capillary walls

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10
Q

During inspiration?

A

intrapulmonary pressure goes down; the volume of the lungs increases

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11
Q

Intrapulmonary pressure is the

A

pressure within the alveoli of the lungs

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12
Q

During inspiration, how does the air pressure within the lungs change?

A

increased lung volume causes a decrease in Ppul

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13
Q

The PO2 of the alveolar air is 104 mmHg. The blood entering the pulmonary capillaries has PO2 of 40 mmHg. As blood leaves the lungs, the blood PO2

A

has increased to 100mmHg

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14
Q

Fully oxygenated arterial blood enters a capillary bed, where is encounters high CO2, inducing a right shift of the hemoglobin dissociation curve. This results in:

A

decreased oxygen binding by hemoglobin

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15
Q

How does most CO2 travel in the bloodstream?

A

as bicarbonate(HCO3-)

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16
Q

In which location will hemoglobin have the weakest affinity for O2?

A

-blood leaving the systemic capillaries of the tissues
-blood in the systemic veins

17
Q

What sets the basic rhythm of breathing rate and depth?

A

the ventral respiratory group

18
Q

Tom begins running causing his arterial PCO2 to increase. What affect will this have on the rest of the body?

A

increased rate and depth of breathing

19
Q

Where does chemical chemical digestion of food begin?

A

the mouth

20
Q

Which of the following is most responsible for the absorption of nutrients?

A

the small intestine

21
Q

What is the correct sequence as food moves through the GI tract?

A

stomach, pyloric valve, duodenum, jejunum, ileum

22
Q

Chemical digestion reduces large complex molecules to simpler compounds by

A

catabolic reactions

23
Q

The ingestion of a meal high in fat content would cause which of the following to occur?

A

bile would be released from the gallbladder to emulsify the fat in the duodenum

24
Q

Which of the following is true of hydrochloric acid(HCl) in the stomach?

A

gastric HCl activates pepsin; HCl kills bacteria