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What is the brain in charge of?
It is in charge of our complex behaviours, controls and coordinates everything we do breathing, sleeping, memory etc.
What is the cerebral cortex?
The outer wrinkly layer of the brain, controls consciousness, memory and language
What is the medulla?
The base, controls unconscious activities like breathing, movement in the intestines and heartbeat
What is the cerebellum?
At the back, responsible for muscle contraction & balance
What is the hypothalamus?
controls homeostasis and pituitary gland
What is the pituitary gland ?
It is the master gland. It produces many hormones that regulate homeostasis e.g ADH, FSH
Name some methods by which scientists study the brain.
MRI, Electrical stimulation, Studying patients with damage to their brain.
Evaluate the benefits and risks of procedures carried out on the brain and the nervous system.
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What is reaction time?
The time it takes to respond to a stimulus
What is reaction time affected by?
Age, drugs e.g. caffeine or gender
Why are computers a better way of measuring reaction time than the ruler test?
Computers can give a more precise reaction time because they remove human error.Computers can record the reaction time to a millisecond so more accura...
What is auxin?
A growth hormone found in the roots and shoots of plants. It controls the growth of plants in response t light, gravity and water.
What does phototropism mean?
The movement of a plant towards light.
If light is coming from one side of a plant what will happen.
Auxin diffuses to the dark/shaded side of plant. This causes the cells to grow faster on that side (elongate) which causes the shoot to bend twards th...
What till happen if the tip of a shoot is removed from a plant?
There will be no auxin as auxin is found in the shoot. The plant will not grow.
What effect does auxin have on shoots and roots?
Auxin promotes growth in shoots and inhibits growth in roots.
