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Questions and Answers
What is the primary function of blood in relation to body temperature?
What is the primary function of blood in relation to body temperature?
- To deliver hormones and enzymes
- To regulate body temperature (correct)
- To provide structural support to tissues
- To protect against infection
Which component makes up the largest portion of blood?
Which component makes up the largest portion of blood?
- Platelets
- Plasma (correct)
- Red blood cells
- White blood cells
In what way does blood contribute to the body's acid-base balance?
In what way does blood contribute to the body's acid-base balance?
- By stabilizing pH levels (correct)
- By delivering waste products
- By regulating body temperature
- By transporting oxygen
What is a function of blood that assists in the removal of metabolic waste?
What is a function of blood that assists in the removal of metabolic waste?
Which statement about blood's role in transport is incorrect?
Which statement about blood's role in transport is incorrect?
Which of the following accurately describes the composition of plasma?
Which of the following accurately describes the composition of plasma?
What role do platelets play in the blood composition?
What role do platelets play in the blood composition?
How does an increase in the number of erythrocytes affect blood flow?
How does an increase in the number of erythrocytes affect blood flow?
What does the term hematocrit refer to?
What does the term hematocrit refer to?
Which statement about the buffy coat is correct?
Which statement about the buffy coat is correct?
Which type of hematopoietic tissue primarily produces lymphocytes?
Which type of hematopoietic tissue primarily produces lymphocytes?
Where is red bone marrow located in the human body?
Where is red bone marrow located in the human body?
What is the primary function of hematopoietic tissues?
What is the primary function of hematopoietic tissues?
Which of the following is NOT a location where lymphatic tissue can be found?
Which of the following is NOT a location where lymphatic tissue can be found?
Which of the following statements best describes the distinction between red bone marrow and lymphatic tissue?
Which of the following statements best describes the distinction between red bone marrow and lymphatic tissue?
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Study Notes
Hematopoietic Tissues
- Produce blood cells
- Two types: Red bone marrow and lymphatic tissue
- Red bone marrow located in ends of long bones and flat, irregular bones
- Lymphatic tissue located in spleen, lymph nodes, and thymus glands, supports blood cell production by producing lymphocytes
Blood Composition and Function
- Consists of plasma and formed elements
- Plasma: Contains proteins, primarily albumin, plays vital roles in blood clotting, immune response, and fluid regulation, serum is plasma without clotting proteins
- Formed elements: Constitute 45% of blood, include erythrocytes (RBCs), leukocytes (WBCs), and platelets (thrombocytes), WBCs and platelets form a layer beneath plasma called the buffy coat, buffy coat comprises approximately 1% or less of total blood volume, RBCs are the heaviest and sink to the bottom, hematocrit is the percentage of RBCs in a blood sample
Viscosity
- Refers to thickness or stickiness of a fluid
- Decrease in RBCs makes blood thinner (less viscous), causing faster blood flow
- Increase in RBCs increases viscosity, leading to slower blood flow
Blood Cell Formation
- Hematopoietic processes are responsible for blood cell production
Blood
- Connective tissue composed of various cells and fluid, also known as fluid matrix
- Functions:
- Transports oxygen, nutrients, hormones, enzymes, etc. throughout the body
- Removes waste products from body's cells
- Protects the body against infection
- Stabilizes body's acid-base balance
- Regulates body temperature
Plasma
- Clear extracellular matrix of liquid connective tissue, accounts for 55% of blood
- Main component is water
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