cardiovascular system Flashcards
(11 cards)
1
Q
regular heart rate
A
75 bpm
2
Q
Regulations of cardiac output
cardiac output:
A
amount of boood pumped by heart per minute
stroke volume= 70ml
cardiac output= 5250ml
during exercise maybe: 25l
3
Q
what determines stroke volume?
A
- venous return and stretching of cardiac muscles
- muscular pump
4
Q
what determines heart rate
A
neural controls
biochemical controls
5
Q
cardiovascular diseases
risk factors
A
age
lifestyle
ethnicity
diet
family history
6
Q
cardiovascular diseases
changes to blood vessels
A
arteriosclerosis
atherosclerosis
aneurysm
change shape of bv
7
Q
cardiovascular diseases
changes to blood vessel cal lead to
A
- leakage OEDEMA IF FLUID AND HAEMORRHAGE IF BLOOD
- reduced oxygen supply
8
Q
cardiovascular diseases
arteriosclerosis
atherosclerosis
A
- due to getting older etc loss of elasticity
- thickening and hardening of artery’s walls
- lumen smaller
- reduced blood flow increased bp
- atherosclerosis- same but due to fat build up
9
Q
transient ischaemic attack
A
- sudden short lived loss of vision
- due to blockage in retinal artery
- breaks down and blood flow restored
- but high risk of stroke
10
Q
stroke
A
loss of blood flow to area of brain
permanent visual field loss
11
Q
cranial nerve palsies
A
- disruption of blood flow to area
- loss of function of cranial nerve, change in eye movements
