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Flashcards in Cardio System Deck (71)
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1

Which most closely approximates the percentage of water in plasma by weight?

92%

2

Leukocytes are the _______ of the formed elements, and leukocytes have ______________.

largest, prominent nuclei

3

How many oxygen molecules may bind to a single molecule of hemoglobin?

4

4

Which leukocytes are derived from the myeloid line?

Neutrophils, basophils, eosinophils, and monocytes

5

The hemoglobin found in erythrocytes is able to chemically attach to

both oxygen and carbon dioxide.

6

Blood plasma is slightly _______; if pH drifts out of the normal range, dire consequences can result from alterations in the structure of _______ .

basic, proteins

7

Typically, an adult's body contains _______ of blood.

5 liters

8

One of the unhealthy effects of blood doping is to

increase the viscosity of the blood.

9

Which are characteristic of leukocytes?
a: Smaller than erythrocytes
b: Have a nucleus
c: Have no hemoglobin
d: More numerous than erythrocytes
e: Depending on type, may or may not contain granules

b, c, e

10

Which leukocytes are granulocytes?
a: Neutrophils
b: Eosinophils
c: Lymphocytes
d: Monocytes
e: Basophils
f: Erythrocytes

a, b, e

11

The type of leukocyte that is very active during a bacterial infection is a(n)

neutrophil.

12

The life span of an erythrocyte is about _________ days.

120

13

When over 10% of the body's blood has been lost, a survival response occurs involving activation of the ________ nervous system.

sympathetic

14

An individual’s hematocrit would vary with

*All of the choices are correct.

15

Plasma makes up about ______ percent of a centrifuged sample of whole blood.

55

16

The clinical definition of the hematocrit refers to the percentage of

erythrocytes in the blood.

17

Sodium, calcium, and bicarbonate are all described as plasma

electrolytes.

18

Which are the most numerous of the leukocytes?

Neutrophils

19

The agglutinogens (or antigens) that determine the ABO and Rh blood types are

surface of erythrocytes.

20

The"buffy coat" consists of

leukocytes and platelets.

21

When blood loss is severe, the __________ nervous system helps maintain blood pressure and divert blood to where it is needed most.

sympathetic

22

Which component of whole blood plays the greatest role in maintaining normal fluid levels in the cardiovascular system and preventing fluid loss?

Plasma

23

Platelets are formed from

pieces of the megakaryocyte breaking off.

24

Plasma is composed of about ___________ % water.

92

25

Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?

Aortic semilunar valve

26

The serous fluid within the pericardial cavity works to

lubricate membranes of the pericardium.

27

Which pair is located more anteriorly in a heart in normal position?

Right atrium and right ventricleCorrect

28

Which carries oxygenated blood from the lungs to the heart?

Pulmonary veins

29

Which action leads to the closure of the right atrioventricular valve?

Contraction of the right ventricle

30

Blood moves into and then out of a heart chamber because

it moves along its pressure gradient, and that gradient depends on contraction and relaxation during the cardiac cycle.