What is the primary mechanism for maintaining constant cerebral blood flow despite changes in systemic blood pressure?
AEndothelial factors
BBaroreceptor reflex
CMyogenic autoregulation
DMetabolic control
Which of the following physiologic changes decreases pulmonary vascular resistance (PVR)?
AInhaling the inspiratory reserve volume (IRV)
BExhaling the entire vital capacity (VC)
CExhaling the expiratory reserve volume (ERV)
DBreath holding maneuver at functional residual capacity (FRC)
EInhaling the entire vital capacity (VC)
A 55-year-old woman comes to the physician because of involuntary hand movements that improve with alcohol consumption. Physical examination shows bilateral hand tremors that worsen when the patient is asked to extend her arms out in front of her. The physician prescribes a medication that is associated with an increased risk of bronchospasms. This drug has which of the following immediate effects on the cardiovascular system? Stroke volume | Heart rate | Peripheral vascular resistance
A↓ ↓ ↓
B↓ ↓ ↑
C↓ ↑ ↑
D↑ ↑ ↑
E↑ ↑ ↓
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