B6 BRAIN AND MIND
- Created by: emilysmeeton
- Created on: 01-06-16 17:54
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- B6 BRAIN AND MIND
- Communication systems
- Nervous System
- sends messages between body cells using neurons; includes the central nervous system and peripgeral nervous system
- Central nervous system (CNS)
- brain and spinal chord
- Peripheral nervous system (PNS)
- network of neurons
- Central nervous system (CNS)
- quick short response - the nerve impulse is electrical
- sends messages between body cells using neurons; includes the central nervous system and peripgeral nervous system
- Hormonal system
- produces chemical message in the form of hormones.
- slower then NS but rsponse lasts longer
- Nervous System
- sends messages between body cells using neurons; includes the central nervous system and peripgeral nervous system
- Central nervous system (CNS)
- brain and spinal chord
- Peripheral nervous system (PNS)
- network of neurons
- Central nervous system (CNS)
- quick short response - the nerve impulse is electrical
- sends messages between body cells using neurons; includes the central nervous system and peripgeral nervous system
- hormones are chemicals produced by glands. they are transported in the blood.
- Nervous System
- Neurons
- cells that are specialised for carrying nerve impulses
- in the nervous system, neurons link receptor cells to effector cells
- receptor
- part of a neuron that detects stimuli and converts them into nerve impulses
- stimulus
- a change in the environment that causes a response by stimulating receptor nerve cells
- stimulus
- part of a neuron that detects stimuli and converts them into nerve impulses
- effector
- part of the body that responds to a stimulus
- receptor
- the PNS is made up of sensory and motor neurons
- transmit electrical impulses when stimulated
- cells that are specialised for carrying nerve impulses
- a neuron has an axon - a long extension of the cytoplasm surrounded by a cell membrane
- axons are surrounded by a fatty sheath - this insulates the neurons from nearby cells, so electrical signals can pass along it quickly
- SYNAPSES
- the small gap between two neuorns
- nerve impulses reaches the end of nerve and is changed to a chemical signal - this crosses the synapse and sets up an electrical impulse in the next neuron
- when nerve impulse reaches end of first neuron, a chemical transmitter substance is released.
- transmitter substance = chemical that crosses a synapse
- seretonin
- the transmitter difuses acriss the synapse and binds with receptor molecules in the membrane of next neuron.
- nerve impulse is then propagated to second neuron
- receptor molecule = allow transmitter to bind to them, found on membrane
- transmitter substance = chemical that crosses a synapse
- when nerve impulse reaches end of first neuron, a chemical transmitter substance is released.
- nerve impulses reaches the end of nerve and is changed to a chemical signal - this crosses the synapse and sets up an electrical impulse in the next neuron
- DRUGS
- prozac (anti depressant) increases seretonin levels
- ecstasy works on seretonin
- it blocks the reuptake, increasing the concentration
- more seretonin
- it blocks the reuptake, increasing the concentration
- beta blockers block the receptor sites
- the small gap between two neuorns
- reflexes
- automatic response - action made without thinking
- goes through a reflex arc to happen
- stimulus - receptor - sensory neuron - relay neuron - motor neuron - effector (muscle)
- goes through a reflex arc to happen
- automatic response - action made without thinking
- Communication systems
- connected
- connected
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