june 2017- paper 3 Flashcards

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

how does a nerve impulse cause the release of a neurotransmitter? (3)

A
  • nerve impulse causes Ca2+ channels to open
  • Ca2+ enter by facilitated diffusion
  • causes synaptic vesicles to fuse with the synaptic cleft
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

movement of myosin up actin (2)

A
  • myosin head binds to actin and bends
  • whatever is attached to the myosin is pulled along actin
  • next myosin head binds to actin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

method of determining species richness (3)

A
  • select sampling sites at random
  • use a quadrat
  • identify which species are present in each quadrat
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

why does phosphorylation cause enzyme catalysed reactions to happen

A

raises the energy level of substrates

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