solve if you can challenge? (all)
Answers
1 medula oblangata
2 shoots show positive photo tropism
3 a pituitary gland
b photo tropism
5 a cerebellum
b hypothalamus
c thalamus
d cerebrum
6 a stimulus of touch
b point where stimulus is received
7 a) the nerve pathway involved in a reflex action, including at its simplest a sensory nerve and a motor nerve with a synapse between.
b) auxins - delay aging
gibberlins - induce parthenocarpism
cytokinins - cell division
ethylene - promote aging
8 absisic acid
9 moves towards point of stimulus
10 a) insulin
b) cortisone
c) sex corticoids
d) groth hormone
12 a) adrenaline production promotes flow of blood to muscles and reduce flow of blood to stomach and intestines
b) because hyper secretion may cause acromagaly in adults and gigantism
14) the movement of plant to stimuli of gravity
types positive and negative geotropism
15) synapse is the gap between two neurons . the impulses are passed through polarisation and repolarisation
16) when the sugar level in blood decreases the insulin production is reduced due to the negative feed back mechanism
17) adrenaline produced by adrenal gland
18) medula oblangata - controls muscular coordination
hypothalamus and thalamus - controls body temp and pressure
19) root
20) shoot show positive phototropism and root shows negative phototropism
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