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Topic 11 corodination and response - Coggle Diagram
Topic 11 corodination and response
auxin
auxins are a class of plant hormones with some morphogen-like characteristics. they are a plant growth hormone and produced in the shoots and the roots of a plant. they control the rate of growth.
hormones
what are hormones? hormones are a chemical stubstance. they are produced by a gland and carried by the blood, which alters the activity of specific target organs
different types of hormones include adrenaline, oestrogen, insulin and testosterone
endocrine glands
excretion
excretion is the process of removing toxic materials and excess substances from organisms. excretion is not the same as egestion.
effector
what is an effector? effectors are parts of the body that produce a response to a detected stimulus.
respones
pupil response
lens accomidation
receptor
receptors are groups of specialised cells. they can detect a change in the environment and produce electrical impulses in response.
temperature regulation
homostasis
homeostasis is the maintenance of a constant internal environment. the nervous system and hormones are responsible for this
geotropism
geotropism is the plants reaction to gravity. stimulus include gravity, light water and temperature.
phototropism
phototropism is a plants response to light. positive stimulus would be growth towards the sun.
osmoregulation
a homeostatic process that controls the amount of water in body fluids (e.g. blood). poor control can lead to the osmotic damage of body cells.
reflex arc
synapse
a synapse is where 2 neurons meet and there is a small gap. An electrical impulse cannot directly cross the gap so a different mechanism has to be used
motor neuron