Drugs On CNS [3] Flashcards
Examples on drugs used for non medical purposes
Alcohol
Nicotine
Caffeine
Heroin
Cocaine
How is the lipid bilayer in neurones stabilised
Hydrophobic interactions
How are the electrical properties of neurones generated
The ability to control the movement on an ion on one side of the membrane to cause a charge different across the membrane
What ions are saturated outside the membrane
Na+ and Cl-
What ions are saturated inside cells
K+
What maintains the concentration gradient
ATPase
What initiates an action potential
Opening of voltage gated sodium channels at the axon hillock
Process of action potential generation
Initiation by sodium channel opening
Influx of Na+ and efflux of K+
Positive charge depolarises membrane
Further opening of voltage gated Na+ channels down axon
Name some neurotransmitters with no other function in physiology
Ach
NE
DA
GABA
Neuropeptide Y
CGRP
Substance P
Where is the limbic system
Beneath the neocortex
What does the limbic system do
Integrates emotional state with motor and visceral activities
Where is the cerebellum
Behind the cerebral hemispheres
What is the cerebellum for
Sensorimotor coordination
What do the mid brain and brain stem do
Relay information from cerebral hemispheres and limbic system to spinal cord and provide integration of reflexive acts
What does the spinal cord do
Receives, sends and integrates sensory and motor information
