B5- Homeostasis and response Flashcards
What is Homeostasis?
Maintaining a stable internal environment
What does denature mean?
Too hot
What does dormant mean?
Too cold
What is the central nervous system?
Connected to the body by sensory and motor neurones
What do sensory neurones do?
Send electrical impulses from receptor to brain.
What do motor neurones do?
Send electrical impulses from brain to effector (muscles and glands)
What is the order of the CNS? Reflex arc?
stimulus-receptor-sensory neurone-CNS-motor neurone-effector-response
What is a synapse?
A synapse is the connection between the neurones. The nerve signal is transferred by chemicals which diffuse across the gap.
What are reflexes?
Rapid automatic responses
What is a neurone?
Specialised cells that conduct electrical impulses
Types of receptors?
Smell,sound,taste,touch,pressure,temperature
What is a somatic nerve?
Make up the part of the nerves system we cannot control
What is a autonomic nerve?
Make up the part of the nerves system we can control
What do stimulants do?
Decrease reaction time
What causes type 1 diabetes?
Genetic or infection