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- colorless, watery fluid of blood and lymph containing no cells Proteins- 8% of plasma, helps maintain water balance in blood and helps transport Electrolytes- helps maintain plasma’s osmotic pressure and normal blood pH Gases- Oxygen and carbon dioxide, both end up binding to hemoglobin in blood Water- equals 90% of plasma volume, it absorbs heat, and is a solute in the blood Nutrients- Particles that are taken in from the digestive tract that can be glucose, lipids, and carbohydrates. Wastes- These are toxic to the body or not needed for any function, such as alcohol being filtered through the kidneys and then excreted as urine. 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 oxygen Leukocytes- White blood cells that protect the body Platelets- Fragments that bind together to stop bleeding 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 _ 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? Lack of oxygen reach tissues What is cyanosis? Skin turning blue due to poor circulation or poor oxygenation of the blood To store more hemoglobin, red blood cells discard their _ nuclei _________ during development.
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- red blood cells, white blood cell