Anatomy Unit 8 Study Guide

Unit 8 Study Guide

1. How many liters of blood does the average adult have?

-The average adult has about 5 liters of blood.

2. What are the components of blood?

-45% of blood is made up of rbc, wbc and platelets

-55% is made up of plasma which is composed of water, amino acids, proteins, carbohydrates, lipids, vitamins, hormones, electrolytes and cellular waste)

3. What does the hematocrit measure?

-Hematocrit measure the number and volume of cells.

4. What percentage of blood is cells?

-45% of blood is composed of cells

5. What percentage of blood is made of plasma?

-55% of blood is made of plasma

6. What do erythrocytes look like and what is their function?

-An erythrocyte is also known as a red blood cell and they help carry oxygen into the body. An erythrocyte is usually disk-shaped and bi-concaves. It contains hemoglobin and does not have a nucleus.

7. How do mature erythrocytes differ from immature ones?

-Mature erythrocytes are flexible and concave disks that do not have a nucleus; however, immature ones are much more fragile and are very brittle.

8. What is a normal RBC Count?

-A normal RBC count measures the amount of red blood cells in a sample and makes an estimate of how much there is in an average person’s blood. For children, the normal count ranges from 4.6-4.8 million/uL. For women, the average range is 4.2-5.4 million and for men, it falls in between 4.7-6 million.

9. What makes blood red?

-The protein called hemoglobin makes blood red. The hemoglobin contais iron and is found in the red blood cells.

10. How long does the average RBC live?

-The average life of a RBC is about 120 days.

11. What hormone controls the rate of rbc synthesis?

-RBC production and synthesis is stimulated by a protein called erythropoietin.

12. What element is part of a red blood cell?...