BIOPSYCH

• what are the 2 divisions of the human nervous system central ns + peripheral
• what are the 2 divisions of the central nervous system brain + spinal cord
• what are the 2 divisions of the peripheral ns autonomic ns + somatic ns
• what are the 2 divisions of the autonomic ns sympathetic ns + parasympathetic ns
• what does the autonomic ns do transmit info to and from vital organs
• what does the somatic ns do controls muscle movement and revieves info from sensory receptors
• what does the sympathetic ns do increase body activity - fight or flight
• what does the parasympathetic ns do decreases body activity - rest and digest
• what functions stop oncew the sympathetic ns activates? digestion + salivation
• three examples of the sympathetic ns activated pupils dilate, increased heart rate, dry mouth
• 3 examples of the parasympathetic ns activated? pupils constrict, sweat glands return to normal, decreased heart rate
• the endocrine system controls vital functions in the body, it works slowly but has very widespread effects
• what does the pituitary gland do in charge of whole endocrine system , releases growth hormones and regulates release of hormones
• what does the thyroid gland do regulates calories, metabolism and heart rate
• what does the adrenal gland do releases adrenaline which increases heart rate
• whar does the pancreas produce insulin
• ovaries/testes? produce oestrogen/testosterone - regulates puberty
• SAP - sympathetic ns activates when danger is sensed, pituitary gland releases ACTH hormone - adrenal gland releases adrenaline which increases heart rate - once danger has passed, the parasympathetic ns activates and stops the glands from releasing high levels of hormones - returns to rest and digest
• what are the 3 types of neurons sensory, relay, motor
• what do sensory neurons do carrys sensory messages from CNS -> PNS
• what do relay neurons do connects sensory neurons to motor neurons or other relay neurons
• what do motor neurons do carry movement messages from CNS -> PNS
• function of the dendrites? collects impulse from neuron above + channels signal dowm axon
• function of myelin sheath insulates axon to allow electrical signals to go faster
• functions of nodes of ranvier forces signal to travel faster by making them jump
• function of axon carries electrical signals from cell body to terminal
• function of terminal buttons allows impulse to travel to next neuron
• SYNAPTIC TRANSMISSION - i am very naughty everyday I - impulse arrives at axon terminal of presynaptic neuron V - causes vesicles to release a neurotransmittor into the synapse N - neurotransmittor then crosses synapse and binds to receptor sites on the next neuron E - this causes an electrical impulse to fire down the next neuron, excitatory - causes next neuron to fire inhbitatory - prevents next neuron from firing