Chapter 2 Coordination and Control Flashcards
How do you respond to changes in your surroundings
Impulses from receptors pass along sensory neurones to the brain or spinal spinal cord. Impulses are sent along motoneurons from the brain to the effector organs
Five sense organs
Eyes, ears, nose, tongue and skin
What is a receptor
Cells called receptors detect stimuli brackets (changes in the environment)
How does a reflex occur
A receptor detects a stimulus
a sensory neuron transmits the impulse to the CNS
a relay neuron parts of the impulse on a motor neuron is stimulated
the impulse passes to an effective (muscle or gland) action is taken
Where is FSH made and what does it do
FSH is made by the pituitary gland and causes eggs to mature and oestrogen to be produced.
Where is oestrogen made and what does it do
Oestrogen is produced by the ovaries and stops the further production of FSH and also stimulates the production of LH and also stimulates the women lining to develop and to receive the fertilised egg
Where is. LH made and what does it do
It is made in the pituitary gland and stimulates the mature egg to be released from the ovary
Where is the level of sugar in our body controlled
It is controlled in the pancreas
Plants grow towards the light
= phototropism
Roots grow down towards gravity
= gravitropism
What controls phototropism and gravitropism
Auxin. Unequal distribution can cause bending of the shoot or root
