Intro Flashcards
What characterises acute mountain sickness?
Occurs at heights greater than 2500m Headache Weakness Fatigue Listlessness Nausea Insomnia Loss of appetite
How many additional deaths of those over 65 occurred in England and Wales over winter 2010-11?
22,000
What characterises high altitude pulmonary edema?
Symptoms typical of pulmonary edema
Shortness of breath
Coughing
Frothy/bloodstained sputum
What characterises high altitude cerberal edema?
Confusion
Ataxia
Decreasing levels of consciousness
What is brain plasticity?
Ongoing development and neuronal interactions with CNS
What is a definition for homeostasis?
The dynamic mechanisms that detect and respond to deviations in physiological variables from there ‘set point’ values
This is done by initiating effector responses that restore the variables to the optimal physiological range
What does the CNS control?
Brain and spinal cord Information processing Integration Processing Coordinating sensory and motor commands
What does the peripheral nervous system control?
All neural tissue outside the CNS
EFFECTORS carry info from CNS to PNS
Includes somatic and autonomic systems
Sensory division SENSORS carries info from PNS to CNS
What do sensory Neurons do?
Carry info from PNS to CNS
can have very long axon eg. From toes to spinal cord
What do somatic motor Neurons do?
Shorter dendrites and longer axon
Cell body is in CNS and axon extends to target muscle
Under conscious control
What do visceral motor Neurons do?
Innervate effectors other than skeletal muscle
Cell body is in CNS and axon extends do target tissue
Subconscious control
What do inter Neurons do?
Found only in CNS
Carry info from neuron to neuron
