Lesson 2C

Question 1

What influences blood flow

Answer 1

Cardiac functino 
Vessel compliance
Peripheral resistance 
Tone of vascular musculature 
Blood viscosity 
Pattern of branching vessels and collaterals 
Vasoconstriction and vasodialation
Excercise 
Autoregulation 
Respiration

Question 2

What is vessel compliance

Answer 2

Ability to expand and contract with pressure changes

Question 3

What is peripheral resistance

Answer 3

Ability of arteries to constrict

Resistance increases with contraction

Question 4

Tone of vasculature muscle is

Answer 4

Degree of restriction relative to maximal dialated state

Question 5

What is blood viscosity

Answer 5

Thickness of blood

Question 6

What is autoregulation

Answer 6

Constant blood flow to places that need it such as the brain and the renals

Question 7

Arterial physiology depends on the

Answer 7

Cardiac status

Question 8

Blood flow is determined by (2)

Answer 8

Blood pressure

Peripheral vascular resistance

Question 9

Valvular dysfunction is

Answer 9

Prolapsed, vegetations, regurgitation

Question 10

What is a heart beat

Answer 10

Rhythmic contraction of the heart

Question 11

What is the heart rate

Answer 11

The number of times that the heart contracts per minute

Question 12

What internal pacemaker

Answer 12

Sino-atrial and atrio-ventricular nodes that initiates the hearts own impulses to contract

Produces regular rhythm

Question 13

The heart rate is controlled by the

Answer 13

Autonomic nervous system which regulates below the level of conciousness

Question 14

The heart rate has both a ____ and ______ component

Answer 14

Sympathetic and parasympathetic component

Question 15

Both the sympathetic and parasympathetic component have thier highest control center in the

Answer 15

Brain

Question 16

What does the sympathetic nervous system do to the heart

Answer 16

Increases heart rate and force of cardiac contraction

Question 17

What does the parasympathetic nervous system do to the heart

Answer 17

Reduce the heart rate and force of contraction

Question 18

An increased heart rate yeilds

Answer 18

An increased volume of blood to the tissues

Question 19

In order for fluid in a closed system to move from one point to another

Answer 19

An energy gradient must exist

Question 20

In the case of the arterial tree, blood moves because of a

Answer 20

Pressure gradient

Question 21

In the heart the ____ side is higher presuure and the right side is ______

This creates

Answer 21

Higher

Lower pressure

This creates the necessary pressure gradient

Question 22

What is blood pressure

Answer 22

Force exerted by the blood against the arterial walls when the heart contracts

Question 23

Blood pressure is an important indicator of

Answer 23

Current cardiovascular function and a risk indicator of future cardiovascular morbidity and mortality