PHAR 100- Module 2 Exam Questions
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the nervous system - ✔✔specialized to recognize, process, and integrate
and react to stimuli in the environment
recognize: identify changed in environment (ex. change in temp)
process: perceive those changes (ex. body feels hot or cold)
React: produce a response (ex. sweat or shiver)
Central Nervous System (CNS) - ✔✔- focuses on drugs that target the
CNS
- brain and spinal chord
peripheral nervous system - ✔✔all nervous system tissues outside the
CNS
(CNS) The Brain: Functions - ✔✔-receives and processes inför
-initiates a response
- stores memory
- generates thought and emotion
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(CNS) spinal chord: Functions - ✔✔-carries sensory info from the skin,
muscles, joints, and internal muscles to the brain
- controls motor outflow to the muscles
-controls sensory input (ex. pain sensations)
- controls reflex activity (ex. breathing)
3 main part of the brain - ✔✔midbrain, forebrain, hindbrain
midbrain - ✔✔-area that links the forebrain with the hindbrain
-relay centre for visual (eye) and auditory (ear) stimuli or signals
forebrain: Cerebral Cortex - ✔✔-largest part of the Brian, rich with nerve
cells
Functions: sensory and motor coordination, mental processes, intelligence,
memory, vision, judgement, thought, speech, emotions, and
consciousnesses
- can be stimulated (excited) or depressed (inhibited) by drugs
forebrain: Thalamus - ✔✔-relay centre in which impulses are transmitted to
the cerebral cortex
Function: coordinate and filter incoming signals
-involved with the appreciation of painful sensations
Forebrain: Limbic System - ✔✔-closely associated with hypothalamus
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- integrates memory, emotion, and reward
- limbic system+hypothalamus: controls emotion and behaviour
-contains dopamine reward centres which are targets for drugs of abuse
Forebrain: Hypothalamus - ✔✔- very important
- located near base of the skull
- neurons in the hypothalamus produce substances called "releasing
factors" which travel to the pituitary gland and modify the release of
hormones
- a number of drugs can affect the hypothalamus
Functions:
-control the involuntary functions of the body (heartbeat, blood pressure,
body temp, etc)
forebrain: pituitary gland - ✔✔-release hormones
- these hormones travel and act on peripheral tissues and are involved with
control of growth, behaviour, and metabolism
hindbrain: Pons - ✔✔-connect the midbrain to the medulla and cerebellum
-involved in conducting signals from the cerebral cortex down the medulla
and cerebellum
hindbrain: medulla - ✔✔- site of origin of many nerve cells