Q: Which of the following is the correct formula for calculating hematocrit percentage?

$$\text{Hematocrit} = \frac{\text{Volume of RBCs}}{\text{Total Blood Volume}} \times 100$$

Question 1

Which of the following best describes the primary function of erythrocytes (red blood cells) in the human body?

Accepted Answer

Carrying oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs

Question 2

A patient has a hematocrit of 60%. Which of the following is the most likely physiological consequence?

Accepted Answer

Increased blood viscosity, potentially leading to hypertension

Question 3

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

Accepted Answer

Albumin

Question 4

If a person weighs 220 lbs, what is their approximate blood volume in liters? (Use the formula: $$	ext{Blood Volume (L)} = 	ext{Weight (kg)} 	imes 0.07$$; 1 kg = 2.2 lbs)

Accepted Answer

7 L

Question 5

Which of the following is NOT a function of blood?

Accepted Answer

Synthesis of hormones

Question 6

A blood sample is centrifuged. Which layer contains the majority of white blood cells and platelets?

Accepted Answer

Buffy coat

Question 7

Which of the following statements about hemoglobin is correct?

Accepted Answer

Each hemoglobin molecule can bind up to four oxygen molecules

Question 8

Which plasma protein is directly involved in the blood clotting process?

Accepted Answer

Fibrinogen

Question 9

A patient with sickle cell anemia is at risk for which of the following complications due to the altered shape of their red blood cells?

Accepted Answer

Obstruction of capillaries leading to tissue ischemia

Question 10

Which of the following best explains why plasma proteins are important for maintaining blood volume?

Accepted Answer

They create osmotic pressure that draws water into the bloodstream

Question 11

Which of the following is the correct formula for calculating hematocrit percentage?

Accepted Answer

$$	ext{Hematocrit} = \frac{	ext{Volume of RBCs}}{	ext{Total Blood Volume}} 	imes 100$$

Question 12

Which of the following is a function of globulins in plasma?

Accepted Answer

Acting as antibodies for immune defense

Question 13

Which of the following best describes the composition of plasma?

Accepted Answer

92% water, 7% proteins, 1% other solutes

Question 14

Which of the following is the correct sequence for the formation of a blood clot?

Accepted Answer

Platelet activation → Fibrinogen conversion to fibrin → Clot formation

Question 15

Which of the following is a correct statement about the lifespan of red blood cells?

Accepted Answer

Red blood cells typically survive for about 120 days

Question 16

Which of the following best describes the role of the cardiovascular system?

Accepted Answer

It transports nutrients, gases, hormones, and waste products throughout the body

Question 17

Which of the following is a consequence of decreased plasma albumin levels?

Accepted Answer

Edema due to reduced osmotic pressure

Question 18

Which of the following is true regarding the structure of hemoglobin?

Accepted Answer

It consists of four polypeptide chains, each with a heme group

Question 19

Which of the following best explains why sickle-shaped red blood cells cause health problems?

Accepted Answer

They obstruct capillaries, leading to tissue damage

Question 20

Which of the following is the correct formula for converting body weight in pounds to kilograms?

Accepted Answer

$$	ext{Weight (kg)} = \frac{	ext{Weight (lbs)}}{2.2}$$

Blood: Components, Functions, and Red Blood Cells (Anatomy & Physiology Study Notes)

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