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- Course
- Bio 160
- Institution
- Mesa Community College
Notes for first half of semester of bio160
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[LECTURE STUDY GUIDE] Unit 3Unit Objectives:
• Describe the structure and function of the cardiovascular system
• Describe the structure and function of the lymphatic system and immunity
• Describe the structure and function of the respiratory system
Relevant Topics in Textbook:
Chapter 12 Blood
Chapter 13 Cardiovascular System
Chapter 14 Lymphatic System and Immunity
Chapter 16 Respiratory System
Lecture Exam Review Questions: Lectures 15 ad 16
Blood Composition and Functions
1. Describe the major functions of blood.
Transportation, homeostasis, ph, ions and buffering, defenses, and body temperature
a. How does blood play a role in homeostasis?
• Can cause clotting when needed
2. List the 2 fractions of blood and the relative proportions of their components.
55 percent plasma 45 percent cells
Plasma- 92 percent water 7 percent proteins 1 percent other solutes
Cells- 99.9 Percent red blood cells .1 percent white blood cells
a. What is the function of albumin in the blood? Helps keep fluid from leaking
•
1
, [LECTURE STUDY GUIDE] Unit 3
b. Define blood hematocrit:
Volume of red blood cells
3. Where are new blood cells made?
• Bone marrow
a. What is the name of the stem cell that produces all blood cells?
• Hematopoietic stem cells
4. What is the function of erythrocytes (aka red blood cells)?
Transport oxygen
5. What is hemoglobin?
A protein that carries out oxygen from lungs and returns carbon dioxide
• How many oxygen molecules can each hemoglobin molecule bind?
Four
• Why is the shape of a red blood cell important?
So it can change shape to move through capillary tubes
6. What is the name of the process that produces new red blood cells?
• Erythropoiesis
a. What stimulates the production of new red blood cells?
• Low oxygen
b. What is the name of the hormone released by the kidneys that stimulates the production of
new red blood cells? Erythropoietin epo
c. What happens to a red blood cell when it has reached the end of its lifespan? (what
components can we reuse?)
• They are removed from the blood into the intestine then globin protein is reabsorbed
7. List some reasons why someone might develop anemia.
2
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