2.2: Adaptations for gas exchange in amoeba and worms Flashcards
1
Q
Amoeba’s membranes are..?
A
Thin so diffusion is rapid.
2
Q
Amoeba have a large what?
A
Large surface area to volume ratio.
3
Q
In amoeba, diffusion distances are?
A
Short.
4
Q
Is gaseous exchange rapid enough in an amoeba?
A
Yes, it is rapid enough to supply respiration.
5
Q
Flatworms have a large what?
A
Surface area to volume ratio.
6
Q
Why are diffusion paths short in flatworms?
A
Because they are flat.
7
Q
Earthworms have a smaller what?
A
Smaller surface area to volume ratio than a flatworm.
8
Q
How do earthworms keep moist?
A
Via secreting mucus.
9
Q
Earthworms have a low..?
A
Metabolic rate.
10
Q
What type of circulatory system does an earthworm have?
A
Closed (has blood capillaries) makes a steep concentration gradient.
