co-ordination and responses

Auxins are homones for growth which are proteins

Gravitropism

• They collect down but the opposite happens,

2 systems responsible for the processor

• Nervous system

  • Nerves

  • Parts that make this up

    • Central nervous system

      • Brain

      • Spinal cord

    • Peripheral(cranial) nervous system 

      • Sensory

      • Relay/intermediate

      • Motor

      • Nerves and spinal cord

• Endocrine system 

  • Hormones

Nervous system

• Stimulus

  • Change in the environment

• Receptor

  • A group of cells found in a sense organ 

• CNS

  • Sent to with sensory neurone

• Effector

  • Muscles or glands that respond to an

  • Sent to with motor neurone

• Nerves are made up of neurons/nerves

• Nerves can be up to a metre long

• Neurons are the functional unit of nerves

Reflex arc

• This is the pathway of electrical impulses along all the neurons; it forms an arc.

• Controls reflex actions

• Allows rapid, automatic responses

Synapse

• A junction where 2 neurons meet

• Very busy space and area

• A chemical called a neurotransmitter is secreted into the synapse to help transmit the electrical impulse

When an impulse comes in, it stimulates the vesicles to move towards the membrane of the pre-synaptic neurone. Then it fuses with the membrane (if it doesn't and remains in the middle then it wouldn’t make sense). It diffuses into the synaptic cleft. [now there are many in the cleft]. [the receptors are made specifically for that neurortransmitter]. When the recepto r niece. Recepters a