chapter 20, and 21

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1

Small organs associated with lymphatic vessels are termed:

lymph nodes.

2

Both lymph and venous blood flow are heavily dependent on:

skeletal muscle contractions and differences in thoracic pressures due to respiratory movement

3

The lymphatic capillaries are:

more permeable than blood capillaries.

4

When the lymphatics are blocked due to tumors, the result is:

severe localized edema distal to the blockage

5

Peyer's patches are found in the:

small intestine.

6

The tonsils located at the base of the tongue are the

lingual tonsils.

7

B lymphocytes develop immunocompetence in the

bone marrow.

8

In clonal selection of B cells, which substance is responsible for determining which cells will eventually become cloned

antigen

9

The only T cells that can directly attack and kill other cells are the:

cytotoxic cells

10

Which of the following is a part of the second line of defense against microorganisms

phagocytes

11

Which of the following would be classified as a delayed hypersensitivity reaction

allergic contact dermatitis

12

Immunocompetence

is the ability of individual cells to recognize a specific antigen by binding to it.

13

Helper T cells:

function in the adaptive immune system activation.

14

Natural killer (NK) cells

can kill cancer cells before the immune system is activated.

15

The primary immune response:

has a lag period while B cells proliferate and differentiate into plasma cells.

16

The function of the hepatic portal circulation is to:

collect absorbed nutrients for metabolic processing or storage.

17

The plicae circulares and intestinal villi are found in which of the four layers of the alimentary tube wall?

mucosa

18

Hydrochloric acid is secreted by which of the secretory cells of the stomach?

parietal cells

19

Chemical digestion reduces large complex molecules to simpler compounds by the process of:

catabolism.

20

A fluid secreted into the small intestine during digestion that contains cholesterol, emulsification agents, and phospholipids is

bile

21

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

Bile would be released from the gallbladder to emulsify the fat in the duodenum.

22

Heat-loss mechanisms do not include

vasoconstriction of peripheral blood vessels.