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Questions and Answers
What is the primary function of the circulatory system?
What is the primary function of the circulatory system?
- To protect the body from infections
- To transport oxygen and nutrients to cells (correct)
- To regulate body temperature
- To digest food and absorb nutrients
Which type of blood vessel is responsible for carrying blood away from the heart?
Which type of blood vessel is responsible for carrying blood away from the heart?
- Venules
- Arteries (correct)
- Veins
- Capillaries
What component of blood is primarily responsible for clotting?
What component of blood is primarily responsible for clotting?
- Red blood cells
- Platelets (correct)
- White blood cells
- Plasma
Which hormone is primarily involved in regulating blood pressure?
Which hormone is primarily involved in regulating blood pressure?
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Which process describes the exchange of gases in the lungs?
Which process describes the exchange of gases in the lungs?
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Study Notes
Circulatory System Function
- The circulatory system is responsible for transporting oxygen, nutrients, and hormones throughout the body.
- It also removes waste products like carbon dioxide.
Arteries
- Arteries carry oxygenated blood away from the heart.
Platelets
- Platelets are responsible for blood clotting.
- They adhere to damaged blood vessel walls, forming a plug to stop bleeding.
Renin-Angiotensin-Aldosterone System
- The renin-angiotensin-aldosterone system is a complex hormonal pathway that regulates blood pressure.
- Renin, an enzyme secreted by the kidneys, triggers the production of angiotensin II, which constricts blood vessels and increases blood pressure.
Gas Exchange
- Gas exchange is the process of oxygen and carbon dioxide moving between the lungs and the blood.
- It occurs in the alveoli, tiny air sacs in the lungs.
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