Arteries

Question 1

Arteries are vessels that transport blood

Answer 1

Away from the heart towards capillaries.

Question 2

Arteries are oxygen

Answer 2

Rich

Question 3

Elastic arteries

Answer 3

• largest artery
• conduct blood from heart to more distant muscular arteries
• tunica media consists of large portion of elastic fibers and less smooth muscle
• stretch to accommodate blood being ejected from left ventricle and elastic fibers help rebound their original diameter, smoothing out pulsation blood flow

Question 4

Muscular arteries

Answer 4

• smaller
• farther from heart
• tunica media proportional thicker consists of multiple layers of smooth muscle bound between distinct elastic laminate
• extra muscle and reduced elastic fibers of tunica media allow vasodilation and vasoconstriction in order to regular distribution of blood to specific body regions

Question 5

Arterioles

Answer 5

• smallest class
• deliver blood to capillaries, where gas and nutrient exchange can occur
• always under some level of contraction (vasomotor tone) and regular by vasomotor center of brainstem
• lead to metarterioles from which capillaries arise

Question 6

Vasodilation results in

Answer 6

Increase in diameter of lumen of vessel in order to allow for greater blood flow to specific regions

Question 7

Vasodilation is accomplished by

Answer 7

Inhibiting and relaxing smooth muscle of tunica media

Question 8

Vasoconstriction

Answer 8

Decrease diameter of lumen of vessel and is achieved by contracting smooth muscle of tunica media

Question 9

Vasoconstriction of blood vessels lumen

Answer 9

Lessens blood flow to specific region downstream to vessel

Question 10

Great of contraction can be modified leading to vasodilation and vasoconstriction of vessels and is greatly influenced by

Answer 10

Sympathetic nervous system