Biopsychology YR12

• What does the nervous system do?

  A network of cells which collects, processes and responds to information from environment and coordinates the working of different cells and organs
• What is the CNS split into?

  Peripheral nervous system (PNS)

  Central nervous system (CNS)
• What does the peripheral nervous system do?

  Transmits information to and from the CNS
• what is the PNS split into?

  Somatic nervous system (SNS)

  Automatic nervous system (SNS)
• What does the somatic nervous system do?

  Transmits information to and from sense and from the CNS
• What does the automatic nervous system do?

  Transmits information to and from internal organs to sustain life process
• What is the ANS split into?

  Sympathic nervous system (SNS)

  Parasympathetic nervous system (PNS)
• What does the SNS do?

  Generally increases bodily activities (fight or flight)
• What does the PNS do?

  Generally maintains or decreases bodily activities (rest and digest)
• What does the CNS do?

  Conceded with all life functions and psychological processes
• What is the CNS split into?

  Spinal cord

  Brain
• What does the spinal cord do?

  Receives and transmits information to and from the brain
• What does the brain do?

  Maintains life and involved in higher functions and psychological processes
• What do neurons do?

  Transmit information as electrical impulses
• What are the 3 types of neurons?

  Sensory

  Relay

  Motor
• What is the sensory neuron made up of?

  Dendrites

  Myelin sheath

  Cell body

  Synaptic knob
• What does the sensory neuron do?

  Receives impulse from sensory organs and sends it to the CNS
• What is the relay neuron made up of?

  Dendrites

  Nucleas

  Cell body

  Axon

  Synapses
• What does the relay neuron do?

  Impulse from sensory neuron and sends it to motor neuron
• What is the motor neuron made up of?

  Dendrites

  Cell body

  Axon

  Myelin sheath
• What does the motor neuron do?

  Impulse from relay neuron and sends it to muscle or effector cell
• What does the endocrine system do?

  Communicates chemical messages to organs in the body
• What are hormones?

  chemical messengers
• How do hormones travel through the body?

  through the bloodstream
• What does the endocrine system help?

  Regulate the activity of cells and organs
• What is the endocrine system controlled by?


  The hypothalamus
• What are the stages of the endocrine system?

  Stimulus - response - hormone - effector - response
• What parts of the body are involved in the endocrine system?

  Hypothalamus

  Pituitary

  Heart

  Kidney

  Pancreas

  Adrenal gland

  Testis

  Ovary
• What are the parts of a synapse?

  Pre-synaptic neuron

  Vesicles

  Reuptake channel

  Post-synaptic neuron

  Receptors
• What is synaptic transmission?

  Electrical signals pass though the synaptic gap through neurotransmitters
• What can neurotransmitters do?

  Either:

  Reuptake

  Defuse

  Breaken down by enzyme
• What do excitatory neurotransmitters do?

  Cause an electrical change in membrane of the cell (results in excitaratory postsynaptic potential)
• What do inhibitory neurotransmitters do?

  Cause a electrical change in membrane of cell (results in inhibitory postsynaptic potential)
• During fight or flight what is secreted?

  Adrenaline
• What does adrenaline cause?

  A change in bodily functions due to arousal of sympathetic nervous system and reduces the parasympathic nervous system
• What happens once the threat is over during F&F?

  Parasympathic branch takes over