$$\text{Hematocrit} = \frac{\text{Volume of erythrocytes}}{\text{Total blood volume}} \times 100\%$$

Question 1

Which of the following is NOT a function of blood?

Accepted Answer

Producing hormones for the endocrine system

Question 2

A patient has a hematocrit of 60%. Which of the following is most likely to occur as a result?

Accepted Answer

Increased risk of blood clot formation

Question 3

Which plasma protein is the most abundant and is primarily responsible for maintaining the osmotic pressure of blood?

Accepted Answer

Albumin

Question 4

If a person is severely dehydrated, which of the following changes would you expect in their blood?

Accepted Answer

Increased hematocrit

Question 5

Which of the following best describes the composition of plasma?

Accepted Answer

90% water, 10% solutes including proteins, nutrients, gases, and hormones

Question 6

A blood sample is centrifuged. Which layer contains the leukocytes and platelets?

Accepted Answer

Buffy coat

Question 7

Which of the following equations correctly represents the calculation of hematocrit?

Accepted Answer

$$	ext{Hematocrit} = \frac{	ext{Volume of erythrocytes}}{	ext{Total blood volume}} 	imes 100\%$$

Question 8

A patient has a total blood volume of 5 L and a hematocrit of 40%. What is the approximate volume of erythrocytes in this patient?

Accepted Answer

$$2.5\ 	ext{L}$$

Question 9

Which of the following statements about plasma is TRUE?

Accepted Answer

Plasma is the least dense component of whole blood

Question 10

Which of the following is a regulatory function of blood?

Accepted Answer

Maintaining adequate fluid volume in the circulatory system

Question 11

A laboratory test reveals a patient’s blood is 8% of their total body weight. If the patient weighs 70 kg, what is their approximate blood volume?

Accepted Answer

$$5.6\ 	ext{L}$$

Question 12

Which of the following best explains why albumin is important in the blood?

Accepted Answer

It is the most important contributor to blood osmotic pressure

Question 13

Which of the following is a correct statement about the formed elements of blood?

Accepted Answer

They include erythrocytes, leukocytes, and platelets

Question 14

A patient’s blood sample is found to be slightly alkaline. What is the likely pH range of this sample?

Accepted Answer

$$7.35 - 7.45$$

Question 15

Which of the following is a function of plasma proteins?

Accepted Answer

Maintaining osmotic pressure and transporting molecules

Question 16

Which of the following best describes the role of plasma in blood?

Accepted Answer

It serves as the liquid matrix that suspends formed elements and transports solutes

Blood: Structure, Function, and Composition

Study Guide - Practice Questions