Table of Contents
- 1 What is the name of the vessels that supply the muscle in the heart walls with blood?
- 2 What is the regulation of blood flow by local mechanisms within a capillary bed?
- 3 What hormone causes blood vessels constrict?
- 4 What action occurs when the aortic and carotid baroreceptors are stimulated?
- 5 Which is a common mechanism to control blood flow to different areas of the body?
What is the name of the vessels that supply the muscle in the heart walls with blood?
Coronary arteries supply blood to the heart muscle. Like all other tissues in the body, the heart muscle needs oxygen-rich blood to function.
What happens when carotid and aortic baroreceptors slow their discharge?
When carotid and aortic baroreceptors slow their discharge, ANSWER: the heart rate will decrease to lower blood pressure.
What is the regulation of blood flow by local mechanisms within a capillary bed?
Blood flow through the capillary beds is controlled by precapillary sphincters to increase and decrease flow depending on the body’s needs and is directed by nerve and hormone signals.
Which hormone is responsible for vasoconstriction?
Norepinephrine
Norepinephrine causes vasoconstriction, leading to the perfusion of more small vessels than under control conditions, and has a stimulatory effect on muscle metabolism as measured by oxygen uptake (61).
What hormone causes blood vessels constrict?
The nerve chemical messengers and hormones that tell blood vessels to constrict include: norepinephrine. epinephrine. angiotensin II.
What are the names of the vessels that supply the heart with oxygen?
The major blood vessels connected to your heart are the aorta, the superior vena cava, the inferior vena cava, the pulmonary artery (which takes oxygen-poor blood from the heart to the lungs where it is oxygenated), the pulmonary veins (which bring oxygen-rich blood from the lungs to the heart), and the coronary …
What action occurs when the aortic and carotid baroreceptors are stimulated?
Increased stimulation of the nucleus tractus solitarius by arterial baroreceptors results in increased inhibition of the tonically active sympathetic outflow to peripheral vasculature, resulting in vasodilation and decreased peripheral vascular resistance.
What do baroreceptors do in the cardiovascular system?
Baroreceptors are mechanoreceptors located in blood vessels near the heart that provide the brain with information pertaining to blood volume and pressure, by detecting the level of stretch on vascular walls. As blood volume increases, vessels are stretched and the firing rate of baroreceptors increases.
Which is a common mechanism to control blood flow to different areas of the body?
Vasodilation is a mechanism to enhance blood flow to areas of the body that are lacking oxygen and/or nutrients. The vasodilation causes a decrease in systemic vascular resistance (SVR) and an increase in blood flow, resulting in a reduction of blood pressure.
Which of the following is true when comparing arteries and veins?
Which of the following is true when comparing arteries and veins? Arteries carry blood away from the heart; veins carry blood to the heart. Veins are less muscular than arteries and have a larger lumen; unlike arteries, veins also have valves to prevent the backflow of blood.