Neural Control of Blood Vessels

What is the primary function of baroreceptors in the cardiovascular system?

• To detect changes in blood oxygen levels

• To respond to changes in arterial pressure and stretch

• To regulate body temperature

• To control blood glucose levels

Where are the reflexes involving baroreceptors integrated?

• In the spinal cord

• In the cardiovascular center of the medulla

• In the cerebellum

• In the hypothalamus

What type of fibers carry the output from the cardiovascular center to the heart and vascular smooth muscle?

• Sensory fibers

• Autonomic fibers

• Motor fibers

• Somatic fibers

What is the role of sympathetic fibers in vasocontrol at rest?

• To dilate blood vessels

• To maintain a steady state of constriction in arterioles

• To increase heart rate

• To decrease blood pressure

What happens when baroreceptors detect an increase in arterial pressure?

• They stimulate SNS activity and decrease PNS activity

• They stimulate PNS activity and decrease SNS activity

• They increase heart rate

• They cause vasodilation

Which of the following best describes vasomotor tone?

• The dilation of veins

• The steady state of constriction in arterioles

• The relaxation of cardiac muscles

• The increase in blood glucose levels

What type of receptors are baroreceptors?

• Chemoreceptors

• Thermoreceptors

• Mechanoreceptors

• Photoreceptors

Which system's activity is decreased when baroreceptors detect increased pressure?

• Parasympathetic Nervous System (PNS)

• Sympathetic Nervous System (SNS)

• Central Nervous System (CNS)

• Peripheral Nervous System (PNS)

What is the primary role of the cardiovascular center in the medulla?

• To regulate digestion

• To integrate reflexes involving baroreceptors

• To control voluntary muscle movements

• To process visual information

Which of the following is NOT a function of the autonomic fibers in vasocontrol?

• To carry signals to the heart

• To carry signals to vascular smooth muscle

• To maintain vasomotor tone

• To control skeletal muscle movement