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Questions and Answers
What primary change in cardiac output occurs during vigorous exercise?
What primary change in cardiac output occurs during vigorous exercise?
- It remains constant irrespective of activity level.
- It fluctuates randomly without connection to activity.
- It increases to support heightened metabolic demands. (correct)
- It decreases due to increased blood viscosity.
Which factor does NOT directly influence blood pressure regulation in the body?
Which factor does NOT directly influence blood pressure regulation in the body?
- Seasonal change (correct)
- Total blood volume
- Heart rate
- Peripheral resistance
How does peripheral resistance affect blood flow?
How does peripheral resistance affect blood flow?
- Decreases blood flow when vessels dilate.
- Has no effect regardless of vessel diameter.
- Increases resistance leads to decreased flow. (correct)
- Increases blood flow during increased viscosity.
What role does the placenta play in fetal circulation mechanics?
What role does the placenta play in fetal circulation mechanics?
Which of the following parameters is typically increased in response to blood loss to help maintain blood pressure?
Which of the following parameters is typically increased in response to blood loss to help maintain blood pressure?
Which factor is primarily affected by an increase in preload during exercise?
Which factor is primarily affected by an increase in preload during exercise?
What is the primary function of the placenta in fetal circulation?
What is the primary function of the placenta in fetal circulation?
Which mechanism primarily regulates blood pressure during sudden physical exertion?
Which mechanism primarily regulates blood pressure during sudden physical exertion?
Which characteristic of fetal circulation allows for the bypass of the pulmonary circulation?
Which characteristic of fetal circulation allows for the bypass of the pulmonary circulation?
What factor most significantly influences total peripheral resistance in the circulatory system?
What factor most significantly influences total peripheral resistance in the circulatory system?
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