PEx 11 (1, 3, & 4) Flashcards

1
Q

A hematocrit of 40 means that

A

40% of the volume of blood consists of RBCs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The diagnosis of anemia indicates

A

a lower than normal hematocrit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Polycythemia refers to

A

a significant increase in RBCs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Predict how the hematocrits of the patients living in Denver, Colorado (approximately one mile above sea level), will compare with the hematocrit levels of the patients living in Boston, Massachusetts (at sea level)

A

The hematocrits of the Denver residents will be higher than those of the Boston residents

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why would the hemoglobin levels of an anemic patient be lower than the hemoglobin levels of a normal, healthy individual?

A

Because hemoglobin resides in RBCs, you would anticipate a low hematocrit level to coincide with a low hemoglobin level

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

To complete the blood test to measure hematocrit, you must seal the blood-containing capillary tubes on one end with a clay material so that

A

the blood sample can be centrifuged without having the blood spray out of the tube

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Possible causes of polycythemia include

A

living at high altitudes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

You would expect anemia to develop in a person

A

who has abnormally shaped hemoglobin in their RBCs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A protein found in red blood cells, __________, is necessary for the transport of oxygen from the lungs to the cells of the body

A

hemoglobin (Hb)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How much hemoglobin does normal adult human blood contain?

A

12-18 g/100ml

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why is the average hematocrit higher in males than in females?

A

Higher testosterone levels in males promotes more RBC production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following diseases is known to increase hemoglobin levels in an individual?

A

polycythemia.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which of the following is known to decrease hemoglobin levels in an individual?

A

cirrhosis of the liver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Red blood cell membranes have

A

agglutinogens that specify that individual’s blood type.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following statements about blood types is correct?

A

A person with type O blood has two recessive alleles and has neither the type A nor type B antigen.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Antibodies to the A and B antigens are

A

found preformed in the blood plasma.

17
Q

Why are individuals with the AB- blood type known as universal recipients for blood transfusions?

A

They have both A and B antigens on the surface of their RBCs, and their blood serum does not contain antibodies against A, B, or Rh antigens.

18
Q

To determine an individual’s blood type, drops of the blood sample are mixed

A

separately with antiserum containing antibodies that recognize either type A antigens, type B antigens, or Rh antigens.

19
Q

Antigens are present in

A

all cells

20
Q

ABO and Rh agglutinogens cause the most _______ and __________ transfusion reactions

A

vigorous and potentially fatal