Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

BPK205 > Vascular Foundations 2 > Flashcards

Vascular Foundations 2 Flashcards

1
Q

How is blood flow maintained during ventricular diastole

A

elastic recoil of the arteries sends blood forward into the rest of the circulatory system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Minimum Mean Arteriole Pressure

A

60 mmhg
- required to perfuse the systemic organs (nutrient dilivery etc)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Pulse Pressure Equation

A

Systolic Pressure - Diastolic Pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Mean Arterial Pressure (MAP) Equation

A

DIastolic pressure + (1/3)*(pulse pressure)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

MAP is determined by

A
  1. Blood Volume
  2. Cardiac Output
  3. Resistance
  4. Distribution of blood between venous and arterial vessels
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Blood Volume Determinents

A
  1. Fluid intake
  2. Fluid loss (which depends on kidney regulation and passiveness)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Cardiac Output Determinents

A
  1. Heart Rate
  2. Stroke Volume
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Resistance Determinents

A
  1. arteriole diameter
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Distribution of blood determinents

A
  1. diameter of the veins
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Arteriole Resistance determination

A

arteriolar radius, which can be changed by
1. local factors
2. SNS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Local Factors of Radius Change

A
  1. Myogenic Autoregulation
  2. Paracrines released in response to changes in tissue needs
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Myogenic Autoregulation

A

reflexive constriction of the blood vessel in response to an increased pressure
- decreases blood flow/pressure
- increases contraction and resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Paracrines released in response to changes in tissue needs types

A
  1. Active Hyperemia
  2. Reaction Hyperemia
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Active Hyperemia

A

matching flow to metabolic demand
EX) increased demand will lead to increased blood flow by vasodilation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Reactive Hyperemia

A

compensation following a period of reduced blood flow
EX) decreased blood flow due to blocked leads to vasodilation to increase blood flow and move the blockage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

SNS affect on Arteriole Resistance

A

SNS exerts tonic control with two neurotransmitters
1. Norepinephrine
2. Epinepherine

17
Q

Norepinepherine Pathway on arteriole resistance

A
  1. binds to alpha-1 adrenergic receptors on most smooth muscle cells
  2. coupled to Gq proteins that activate PLC
  3. results in increased IP3
  4. increased Ca release from SR
  5. Smooth muscle contraction
18
Q

Norepinepherine Overall Effect

A

increases contraction and diverts the blood flow away from skin/visceral organs

19
Q

Epinepherine Pathway on arteriole resistance

A
  1. binds to beta-2 adrenergic receptors on smooth muscle cells of the skeletal muscles/heart/liver
  2. coupled to Gs protein AC
  3. increases cAMP and PKA
  4. Smooth muscle relaxation
20
Q

Epinepherine Overall Effect

A

increases relaxation and diverts the blood flow towards the heart/lungs/liver

21
Q

baroreceptors function

A

pressure sensors with stretch activated channels

-maintains arterial pressure homeostasis

22
Q

baroreceptors location

A
  1. carotid sinus
  2. aortic arch

BPK205 (26 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions