Chapter 17- Blood Assignment -part 1. - Chapter 17 Blood...

Chapter 17: Blood Assignment
For this assignment, please read the chapter and answer the questions below. Please type
your answers in red or blue color.
Please note that points may be deducted if answers are not submitted in these colors.
There is a tutorial on blood cells in Blackboard under the Lab Tutorial button. Use
it to study the different kinds of blood cells. Under the External Links button
Blood Functions :
Understand the following functions of Blood.
i) Transport Nutrients, Hormones, Wastes
ii) Regulates Body Temperature
iii) Provides Protection (Immune Response, Hemostasis)
Blood Composition: write a short description of each of the following components of blood
Plasma-
Non-living fluid matrix
Proteins-
Contribute to osmostic pressure, maintain water balance in blood and tissues
Electrolytes-
Help maintain plasma and osmotic pressure and normal blood pH
Gases-
Oxygen and CO2. Binds to hemoglobin in RBC’s.
Water-
H20
Nutrients-
Organic: Glucose, carbs, amino acids, fatty acids, glycerol, triglycerides, cholesterol, vitamins
Wastes-
Nitrogenous waste
Formed Elements (cells): Briefly describe the functions for the following cells:
Table 17.2 on page 644 in the textbook gives you a summary of the formed elements of the blood.
1

Red Blood Cell (RBC) = Erythrocyte :
Figure 17.7 on page 638 in the textbook reviews the life cycle of RBC’s
Red blood cells (erythrocytes) are biconcave disks and this shape increases the _ surface _ _ area _
of the cell and maximizes diffusion of gases. Watch the hemoglobin animation in the course
documents.
The _ hemoglobin _ protein binds oxygen in RBCs.
When oxygen combines with hemoglobin, it forms bright red_ oxyhemoglobin _.
When hemoglobin releases the oxygen, it becomes dark red _ deoxyhemoglobin _.
What is hypoxia?
Too few RBC’s. Caused by loss of blood, low hemoglobin per RBC, and Low O2/
What is cyanosis?
A bluish discoloration of the lips and fingers. Caused by poor circulation, or low Oxygen in the
blood.
To store more hemoglobin, red blood cells discard their _ nuclei _ during development.
Without DNA, RBCs cannot reproduce or produce proteins.
RBC counts :
What is a typical RBC count for males?
4.6 – 6.2 million/ cubic mm
What is a typical RBC count for females?
4.2 – 5.4 million/ cubic mm
RBC Production: