Cardiovascular System: Blood Vessels. Chap. 23 Flashcards Preview

Anatomy & Physiology - Kuntzman > Cardiovascular System: Blood Vessels. Chap. 23 > Flashcards

Flashcards in Cardiovascular System: Blood Vessels. Chap. 23 Deck (24)
1

size of blood vessels,

Arteries, Arterioles, veins to venules

2

Which kind of vessels have the following:
Larger lumen, thinner walls
Valves to prevent back flow

Veins

3

Which are smaller? Venules or Veins

venules

4

which type of blood vessels control blood pressure

Arterioles

5

how does sympathetic activity effect blood vessels

vasoconstriction - narrowing

6

What adjusts flow into capilaries

arterioles

7

Where does gas exchange take place

capillaries

8

Smooth muscle in veins vs arteries, which is bigger

Arteries

9

Which type of blood vessel has a larger lumen

veins

10

Where is the slowest rate of blood flow

Slowest rate of flow is through capillaries
Allows time for exchange through wall

11

What creates colloid osmotic pressure

Plasma proteins create this “pulling” pressure
Causes reabsorption of fluid from outside to inside

12

What determines fluid in circulation

Balance of BP and osmosis

13


where does excess fluid go?

excess fluid returned via lymphatic system

14

What are the three mechanisms of venous return

Pressure
Skeletal contractions
Respiratory pump

15

of the blood vessels which vessel has the highest BP

Aorta 110/70 mm Hg

16

The cardiovascular system helps regulate what

Heart rate
Stroke volume
Blood pressure
Blood flow to specific tissues

17

Cardiovascular Center by which mechanisms does it work

By neural mechanisms
By hormonal mechanisms

18

How is capillary filling controlled

by small arterioles and precapillary sphincters

19

What are the factors that regulate blood flow and BP

Blood volume and ventricular contraction  cardiac output
Vascular resistance: opposition to flow (depends on lumen diameter and vessel length + blood viscosity)

20

By which mechanisims is the cardiovascular controlled

Neural & Hormonal

21

When checking blood pressure, how do you know when you have found the diastolic BP

When you lower the pressure futher until sounds become faint

22

When checking blood pressure, how do you know when you have found the systolic BP

lower pressure in cuff until flow just starts - first sound indicates systolic BP

23

The circulatory routes of the body, what are the two main routes

systolic and pulmonary

24

In which ways does the cardiovascular centre receive input from the body

Proprioception, Barorecptors and chemoreceptors