module 3 - 8.1 transport systems in multicellular organisms Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

how can single celled organisms like bacteria and amoeba obtain nutrients and excrete waste?

A

diffusion

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

what are the reasons a transport system is needed?

A
  • metabolic rate
  • SA:V
  • transporting moleucles
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is the metabolic rate like in large organisms and why?

A
  • high MR
  • high volume of substances and produce a lot of waste
  • diffusion alone would not be able to intake and expel all the substances
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

where are hormones and enzymes often produced and required?

A

produced in one part, required in a different part
- circulatory systems are used to transport substances

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

what is a specialised circulatory system comprised of?

A
  • a heart
  • a fluid in which substances are transported (bulk flow)
  • vessels that fluid can flow through
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are the 2 types of circulatory systems?

A
  • open
  • closed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is an open circulatory system?

A
  • consists of a heart that pumps haemolymph through short vessels into then haemocoel
  • when the heart relaxes, haemolymph blood is sucked back in via pores called ostia
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is a closed circulatory system?

A
  • blood is fully enclosed within blood vessels at all times
  • blood from heart if pumped through progressively smaller vessels
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

which organisms have a double circulatory system?

A

complex organisms

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