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- contains lots of different thing such as proteins, enzymes, nutrients, wastes, hormones and gases. Proteins- makes up 8% of plasma; all contribute to maintain water balance in blood and tissues Electrolytes- Most abundant solutes by number; cations include Na, K, Ca, and Mg; anions include chloride, phosphate, sulfate, and bicarbonate Gases- oxygen and carbon dioxide Water- makes up to 90% of the plasma volume Nutrients- found in food and is absorbed into digestive tract . Wastes- toxic products that the body naturally gets rid of 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. Erythrocytes- red blood cells that transport Leukocytes- white blood cells that help with immunity Platelets- help with clotting Red Blood Cell (RBC) = Erythrocyte : Figure 17.7 on page 638 in the textbook reviews the life cycle of RBC’s 1
Red blood cells (erythrocytes) are biconcave disks and this shape increases the RBC count 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? It is a deficiency of oxygen reaching tissues. What is cyanosis? When your skin turns blue from bad circulation. To store more hemoglobin, red blood cells discard their nuclei during development. Without DNA, RBCs cannot reproduce or produce proteins.
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- Spring '19
- red blood cells, white blood cell