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Questions and Answers
What is the primary function of maintaining normal blood pressure in the arteries?
What is the primary function of maintaining normal blood pressure in the arteries?
- Increasing metabolic rate
- Enhancing cardiac muscle contraction
- Promoting blood flow to the muscles
- Proper tissue perfusion and prevention of edema formation (correct)
Where do impulses originate and travel through in the cardiac muscle?
Where do impulses originate and travel through in the cardiac muscle?
- Specialized cells of the conduction system (correct)
- Musculature of the atria and ventricles
- Arteries and veins
- Capillaries and veins
Why do smaller muscles have a higher metabolic rate?
Why do smaller muscles have a higher metabolic rate?
- Due to their lower surface area per unit of body mass
- Because they require less blood flow
- Due to their larger surface area per unit of body mass (correct)
- Because they have larger arteries
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Study Notes
Blood Pressure Regulation
- The primary function of maintaining normal blood pressure in the arteries is to ensure proper blood flow and oxygen delivery to organs and tissues.
Cardiac Muscle Function
- Impulses that regulate the heartbeat originate in the sinoatrial (SA) node, located in the right atrium, and travel through the atrioventricular (AV) node and the bundle of His to the ventricles.
Muscle Metabolism
- Smaller muscles have a higher metabolic rate due to their increased energy demand to maintain muscle tone and support bodily functions.
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