Flashcards in 1.2 (P1) Nerves And Hormones Deck (14)
What is a stimulus?
A change in the environment
What detects stimuli?
What detects light
A light receptor
What is a neurone?
A cell that transmits nerve impulses
What is transmitted along a neurone
Go through the reflex arc
What is the co-ordinator?
The central nervous system
What does the sensory neurone do?
Carries nerve impulses from the sense organs (receptor) to the central nervous system
What could be involved in the central nervous system?
The spinal cord
What does the motor neurone do?
Carries nerve impulses from the central nervous system to the effector
What is the gap between neurones called?
How is information passed across the synapse
Chemical messengers or neurotransmitters are diffused across the gap
What is an effector
A gland or muscle that gives a response to the initial stimulus