Describe how hormones and local chemical mediators reach the cells they affect.
Back
Card 37
Front
Synapses are unidirectional. Explain how acetylcholine contributes to a synapse being unidirectional.
Back
Card 38
Front
IAA is a specific growth factor. Name the process by which IAA moves from the growing regions of a plant shoot to other tissues.
Back
Card 39
Front
When a young shoot is illuminated from one side, IAA stimulates growth on the shaded side. Explain why growth on the shaded side helps to maintain the leaves in a favourable environment.
Back
Card 40
Front
Explain the effect of temperature on the rate at which NAA is taken up by the lower surface of the leaf.
Back
Card 41
Front
Suggest how these differences in the cuticle might explain the differences in rates of uptake of NAA by the two surfaces.
Back
Card 42
Front
Transcriptional factors are important in the synthesis of particular proteins. Describe how.
Back
Card 43
Front
At high temperatures, a desert iguana keeps its mouth wide open and breathes in and out rapidly. This is called panting. Explain how panting helps to reduce the body temperature of an iguana.
Back
Card 44
Front
Hydrolysis and condensation are important in the formation of new adult proteins. Explain how.
