APPLIED RADIOLOGICAL ANATOMY

ANATOMY

LIMB VASCULATURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In active muscle, vasodilation occurs from neural factors that act directly on smooth muscle bands of arterioles and precapillary sphincters such as increased ParaSNS activity.
A
true
B
false
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -The purpose of vasodilation is to increase blood flow to the tissues in the body. In response to a need for oxygen or nutrients, tissues can release endogenous vasodilators. The result is a decrease in vascular resistance and an increase in capillary perfusion.

Detailed explanation-2: -Moderately increased concentrations of circulating adrenaline as observed during the initial phases of exercise are known to induce local vasodilation by activation of 2 adrenoceptors.

Detailed explanation-3: -Vascular smooth muscle is found in arteries, arterioles, veins, and lymphatic vessels. The contractile state of VSMC establishes the diameter of these vessels and thus resistance to flow.

Detailed explanation-4: -Exercise: Vasodilation enables the delivery of extra oxygen and nutrients to the muscles during exercise. Alcohol: Alcohol is a natural vasodilator. Inflammation: Inflammation is the body’s way of repairing damage. Natural chemicals: The release of certain chemicals within the body can cause vasodilation. More items •03-Jan-2020

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