0
What else can I help you with?
What decreases peripheral resistance to blood flow?
Vasodilation and decreasing blood viscosity
Is blood flow inversely proportional to resistance?
Yes, blood flow is inversely proportional to resistance in the cardiovascular system. When resistance increases, blood flow decreases, and vice versa. This relationship is governed by Poiseuille's Law.
Contraction of the smooth muscle in arterioles would decrease blood pressure?
Contraction of smooth muscle in arterioles would lead to vasoconstriction, which would increase resistance to blood flow and subsequently increase blood pressure. Conversely, relaxation of smooth muscle in arterioles (vasodilation) would decrease resistance and lower blood pressure.
What happens to blood pressure when the smooth muscle of an arteriole contracts?
When the radius of the smooth muscle decreases the pressure increases. So the blood pressure becomes higher
How does smooth muscle make blood vessels function?
Smooth muscle is mostly in the afferent branch going from the arteries to the arterioles. The body controls where blood will flow by controlling the vessel diameter. An increase in sympathetic tone constricts smooth muscle, decreases blood vessel diameter, and limits blood flow.
Which would have the greater effect on vascular resistance?
Vasoconstriction would have a greater effect on increasing vascular resistance compared to vasodilation. When blood vessels constrict, their diameter decreases, leading to increased resistance to blood flow. Conversely, vasodilation results in an expansion of blood vessel diameter, reducing resistance.
What is the relationship between peripheral resistance and blood pressure?
Systolic BP is a measure of blood pressure while the heart is pumping; diastolic BP is a measure of blood pressure while the heart is not pumping. BP is the pressure of the blood on the walls of the blood vessels.
What is the MOA of hydralazine?
The mechanism of action of hydralazine is not well known. It interferes with the action of the second messenger IP3, limiting calcium release from the sarcoplasmic reticulum of smooth muscle. This results in an arterial and arteriolar relaxation answer found on Wikipedia
What decreases blood flow through arterioles?
Vasoconstriction of an arteriole increases resistance and results in decreased flow through that particular arteriole.
Why does the endocardium have to be smooth?
The endocardium needs to be smooth to facilitate the smooth flow of blood through the heart chambers. A smooth surface reduces the risk of blood clots forming and minimizes friction, allowing for efficient circulation. Additionally, a smooth endocardium helps to prevent damage to the heart valves and muscle.
Hoe does SVR affect blood pressure?
The resistance offered by the peripheral circulation is known as the systemic vascular resistance (SVR). Vasoconstriction (i.e., decrease in blood vessel diameter) increases SVR, whereas vasodilation (increase in diameter) decreases SVR. this constriction and dialation decreases or increases the volume in which the vessles can potensially hold. the blood pressure is subsequantly altered as more or less vascular space is provided.
How does arteriolar resistance affect blood pressure?
the constriction of the smooth muscles surrounding the arteriole closes the opening and reduces blood flow through the arteriole. With this reduced blood flow more blood is left in the artery
