Lab 5 Veins

Question 1

In which vessels do the RBCs travel in single file?

Answer 1

capillaries

Question 2

What vessels are included in microcirculation

Answer 2

capillaries, venules, arterioles, metarterioles

Question 3

How can the different types of vessels in microcirculation be distinguished when looking at a live specimen?

Answer 3

blood flow direction and diameter/size

Question 4

In which vessel does blood flow the slowest and why?

Answer 4

Blood flows slowest in the capillaries. The capillaries have a larger total area where maximum nutrient and gas exchange occur.

Question 5

Blood vessel diameter local regulator: epinephrine

Answer 5

Effect: vasoconstriction, blood pressure and blood flow regulation during stress (systemic)

Question 6

Blood vessel diameter local regulator: norepinephrine

Answer 6

Effect: vasoconstriction redirect blood flow to other areas under stress (systemic)

Question 7

Blood vessel diameter local regulator: acetylcholine

Answer 7

Effect: no effect because para sympathetic doesn’t branch to skin “rest and digest” (local)

Question 8

Blood vessel diameter local regulator: histamine

Answer 8

Effect: vasodilation allow more blood flow to help with inflammatory response (local)

Question 9

Blood vessel diameter local regulator: cold water

Answer 9

Effect: vasoconstriction, reduces blood flow, blood may be redirected to other vital organs (local)

Question 10

Blood vessel diameter local regulator: hot water

Answer 10

Effect: vasodilation to regulate body temp, nutrient delivery, and muscle relaxation (local)

Question 11

Blood vessel diameter local regulator: acid

Answer 11

Effect: vasodilation increasing blood flow to tissues (local)

Question 12

What local factors are responsible for increasing the blood flow through skeletal muscles during exercise?

Answer 12

increased temperature, lactic acid, oxygen, carbon dioxide (local)