1 An aneurysm is a weakening of the walls of a blood vessel. Select one: True Fa

Question

1 An aneurysm is a weakening of the walls of a blood vessel.

Select one:

True

False

2 In an EKG, what does the QRS wave indicate?

Select one:

a. second heart sound

b. electrical signal over the atria

c. first heart sound

d. electrical signal over the ventricles

3 Which of the following is not a function of muscle?

Select one:

a. move lymph in lymphatic vessels

b. move blood in veins

c. generate heat

d. destabilize joints

4 Any substance that triggers an immune response in the body is called a(n) ________.

Select one:

a. MHC marker

b. antigen

c. complement

d. memory cell

5 Which of these is the portion of the heartbeat that involves contraction of the heart?

Select one:

a. pacemaker

b. systole

c. diastole

d. cardiac cycle

6 A disease or condition with clinically distinct symptoms, whose incidence has increased, especially in the past two decades, is called ________.

Select one:

a. declining

b. emerging

c. stagnating

d. reemerging

7 Bacteria that normally live on or in the body and prevent other bacteria from becoming too numerous are referred to as ________.

Select one:

a. pathogens

b. parasitic

c. beneficial bacteria

d. bacterial toxins

8 Bands of connective tissue that help muscles attach to bones are termed ________.

Select one:

a. tendons

b. fibrocartilage

c. ligaments

d. cartilage

9 Which of the following can be defined as small proteins that are secreted from virally infected cells to prevent the spread of the infection?

Select one:

a. interferons

b. macrophage

c. immunoglobulins

d. mast cells

10 Antibodies do all of these things except ________.

Select one:

a. neutralize toxins

b. attract phagocytes

c. stimulate helper T cells

d. activate complement cascade

Explanation / Answer

1) An aneurysm is a weakening of the walls of a blood vessel. True Artery would be most likely to break open if an aneurysm is present.

2) Option C is correct. In an EKG, the QRS wave indicate first heart sound.

3) Option D is correct. Function of muscle involves all except the destabilization of joints.

4) Option B is correct. Any substance that triggers an immune response in the body is called an antigen.

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