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Questions and Answers
What is the primary function of blood in relation to temperature?
What is the primary function of blood in relation to temperature?
- Production of hormones
- Transportation of nutrients
- Regulation of body temperature (correct)
- Defense against pathogens
Plasma accounts for approximately 55% of total blood volume.
Plasma accounts for approximately 55% of total blood volume.
True (A)
List one component of blood and its role.
List one component of blood and its role.
Red blood cells - transport oxygen throughout the body.
Blood is primarily composed of _____ and blood cells.
Blood is primarily composed of _____ and blood cells.
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Match the following components of blood with their functions:
Match the following components of blood with their functions:
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Study Notes
Functions of Blood
- Distribution: Transports oxygen, nutrients, hormones, and waste products throughout the body.
- Regulation: Maintains homeostasis by regulating body temperature, pH levels, and fluid balance.
- Protection: Provides defense against pathogens and facilitates blood clotting to prevent excessive bleeding.
Blood Volume and Composition
- Total blood volume varies based on body size and composition, typically around 5-6 liters in adults.
- Average blood pH maintained around 7.35-7.45, crucial for proper physiological functions.
- Blood temperature generally slightly warmer than body temperature, around 38°C (100.4°F).
Components of Blood
- Plasma constitutes approximately 55% of total blood volume.
- Composed mostly of water (about 90%), essential for transport and cellular function.
- Plasma Proteins: Major types include albumins (regulate osmotic pressure), globulins (immune function), and fibrinogen (involved in clotting).
- Other Substances: Includes electrolytes, nutrients, hormones, and waste products.
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