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A&P Exam 3 -CV > BLOOD PRESSURE > Flashcards

Flashcards in BLOOD PRESSURE Deck (18)
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1
Q

Blood pressure

A

declines as blood progresses through the vascular system from arteries to veins;

Arteries > Arterioles > Capillaries > Venules > Veins

2
Q

Blood pressure

A

the force blood exerts against the inner walls of blood vessels;

most commonly refers to pressure in arteries supplied by the branches of the aorta.

measured in the brachial artery.

3
Q

Arterial Blood Pressure

A

increases and decreases in a pattern corresponding to the phases of the cardiac cycle

4
Q

Right ventricle

A
  • into the pulmonary trunk
5
Q

Left ventricle

A
  • into the aorta
6
Q

Maximum pressure in the arteries

A

systolic pressure (increase)

7
Q

ventricles relax (ventricular diastole)

A

arterial pressure decreases; lowest pressure that remains in arteries before the next ventricular contraction

diastolic pressure (decrease).

8
Q

Cardiac Output

A

= HR (heart rate) * SV (stroke volume)

Homeostasis – 120/80

9
Q

Starling’s Law of the Heart

A

The greater the stretch placed on the myocardial fibers, the greater the force with which they contract which leads to an increase in STROKE VOLUME

**SMALLER SPACE -> INC blood pressure
BIGGER SPACE -> DEC blood pressure

ensures that blood volume discharged from the heart is equal to the volume entering its chambers.

10
Q

CONSTANTLY CHANGING

A

HEART RATE
STROKE VOLUME
PERIPHERAL RESISTANCE

11
Q

Cardiovascular Regualtion

A
  • time perfusion ->send blood to where it is needed
12
Q

Cardiac Output Increases

A
Blood Pressure Rises 
Baroreceptors in Aortic Arch and Caortid Sinuses are STIMULATED 
Sensory Impulses to Cardiac center 
Parasympathetic Impulses to Heart 
S-A Node Inhibited 
Heart Rate Decreases 
Blood Pressure Returns to Normal
13
Q

Stroke volume

A

volume of blood discharged by the left ventricle with each contraction.

**amt of blood pumped out of heart per beat

14
Q

Cardiac output

A

volume of blood discharges by the left ventricle per minute; equals stroke volume x heart rate.

**amt of blood ejected from heart per minute

15
Q

Heart Action

A

produces blood pressure by forcing blood into arteries.

determines how much blood enters the arterial system with each ventricular contraction

16
Q

Blood Volume

A

the sum of the formed elements and plasma volumes in the vascular system

Blood pressure is directly proportional to the blood volume within the cardiovascular system. Changes in blood volume alter blood pressure.

17
Q

Peripheral Resistance

A

amt of resistance of blood flow

Force created by friction between the blood and the walls of the blood vessels; hinders blood flow

18
Q

Viscosity

A

ease with which a fluid’s molecules flow past each other. Increased viscosity -> increased resistance to flow.