Survival And Responce Flashcards
1
Q
Sensory reception pathway key terms
A
- Stimulus - change in environment
- Receptor - cells that detect change
- Coordination - connects information between receptor and appropriate effector
- Response - change due to stimulus
2
Q
Taxis
A
- directional movement
- positive - towards
- negative- away
3
Q
Kinesis
A
- non- directional. Movement due to stimulus
4
Q
Coleoptile
A
Young plant shoot
5
Q
Positive phototropism
A
- light
- auxin to shaded side
- cells elongated towards light
6
Q
Positive gravitropism
A
- auxin attracted to pull of gravity
- cells elongated towards gravity where auxin i present on underside
- root grows down
- auxin evenly distributes
7
Q
Negative phototropism
A
- uneven light distribution
- bend away
8
Q
Negative geotropism
A
- more auxin on lower side
- shoot grows up away from gravity
9
Q
Acid growth hypothesis
A
- active transport of hydrogen ions
- from cytoplasm to spaces in wall
- wall stretches under turgor pressure
10
Q
Nervous organisation
A
- CNS = brain and spinal cord
- peripheral nervous system = pairs of nerves originating from cns
- voluntary NS = conscious responce
- autonomic NS = imposes to glands - voluntary or involuntary
11
Q
Features of IAA
A
- not broken down by light
- moves to shaded side
- produced in tip
- diffuses
- elongates cells
