Homeostatis Propper Flashcards
What is homeostasis
The maintenance of a constant internal environment.
In response to changes in external and internal conditions.
Why is homoeostasis important
Because cells need the right condition in order to function properly including the right conditions for enzyme action
What is a synapse
The connection between 2 neurones
What are reflexes
Rapid automatic responses to certain stimuli that don’t involve the conscious part of the brain
What do the neurons in reflex arcs go through
Spinal cord or through an unconscious part of the brain
What happens when a stimulus is detected by receptors
impulses are sent along a sensory neurone to a relay neurone in the CNS
What are hormones
Chemical molecules released directly into the blood which are carried to target organs
What do hormones control
The things in organs and cells that need constant adjustment
What are hormones produced in and secreted in
By glands called endocrine glands
What are endocrine glands
Glands that make up your endocrine system
What type of effect do hormones have
long lasting effects
What does the tyroid produce
Thyroxine
Describe nerves (3)
- very fast reaction
- act for a short time
- act on a precise area
Describe hormones (3)
- slower action
- act for a long time
- act in a more general way
Insulin make liver turn …
Glucose into glycogen
