AS Biopsychology
- Created by: Cymogan
- Created on: 21-11-17 09:22
View mindmap
- AS BiopsychologyRevision
- Divisions of The Nervous System
- Central Nervous System (CNS)
- Consists of the brain and the spinal cord
- Gives humans higher level mental funtions and allows us to pass messages around the body
- Peripheral Nervous System (PNS)
- Transmits messages via neurons to and from the nervous system
- Autonomic Nervous System (ANS)
- Controls breathing, heart rate, digestion and stress responses
- Somatic Nervous System (SNS)
- Controls muscle movements and recieves information from sensory receptors
- Central Nervous System (CNS)
- Neurones
- Motor Neuron
- Carry impulses from the CNS to effectors
- Linked to Synaptic Transmission
- Relay Neuron
- Connect sensory and motor neurons
- Sensory Neuron
- Carry nerve impulses to the spinal cord and brain
- Carries impulses from all senses
- Synaptic Transmission
- Excitation
- Adrenaline is excitatory and makes a neuron more likely to fire
- Inhibition
- Serotonin is inhibitory and makes a neuron less likely to fire
- Chemical Transmission
- Neuro-transmitters are released from synaptic vesicles
- They are taken up by receptors in the post-synaptic receptor site and converted back into a electrical impulse
- Electrical Tranmission
- When a neuron is in a resting state the inside of the axon is negatively charged
- When the neuron is activated the inside of the axon becomes positively charged and an AP occurs and travels to the end of neuron
- Excitation
- Motor Neuron
- The Endocrine System
- A group of glands that secrets hormones into the blood
- The Pituitary Gland in the brain controls the release of hormones from all other endocrine glands in the body
- Hormones are secreted into the blood and affect any cell that has a receptor for that particular hormone
- The Fight or Flight Response
- Produced by The Endocrine System and the ANS
- When a stressor occurs the hypothalamus triggers the sympathetic branch of the ANS
- The ANS changes from its normal resting state to the physiologically aroused state.
- The hormone Adrenaline is released from the adrenal glands into the bloodstream
- Adrenaline triggers physiological changes in the body e.g. increased heart rate
- Once the threat has passed the PNS returns the body to its resting state
- Divisions of The Nervous System
Comments
No comments have yet been made