Paper 1 Flashcards
1
Q
What is a tissue?
A
A group of similar cells/ cells with a similar function
2
Q
Type of tissue in plants with stem cells
A
meristem
3
Q
What is a stem cell
A
A cell that can differentiate into any type of cell.
4
Q
Which plant does aspirin originate from?
A
Willow
5
Q
Why does a drug need to go through trials before coming to the public?
A
- To check it’s safe/ its side effects
- To check the dosage
- To check its efficacy
6
Q
Where in the heart is a pacemaker found?
A
Right Atrium
7
Q
Which side of the heart is deoxygenated, and which is oxygenated?
A
left - deoxygenated
right - oxygenated
8
Q
FOUR ways an artery structure is different from a vein
A
- Artery has thicker muscle tissue
- Artery has thicker elastic tissue
- Artery has narrower lumen
- Artery does not have valves
9
Q
Effects of coronary heart disease/Effect of party blocked coronary artery
THREE
A
- Less blood flow to the heart, so less oxygen/glucose, lower heart rate.
- Less aerobic respiration, more anaerobic respiration so less energy released.
- Less muscle contractions, less oxygen/glucose so more muscle fatigue/tiredness/breathlessness pain in chest - so build up of lactic acid which causes muscle fatigue.
10
Q
Treatments for coronary artery disease
FOUR
A
- Stent - which opens the artery
- Statins - which reduce blood cholesterol
- heart transplant - replace with a healthy heart/ artificial heart
- artery bypass - divert blood around the blockage
