Flashcards in Nervous System Deck (24):
Central Nervous System
The part of the nervous system composed of the brain and spinal cord
Peripheral nervous system
Made up of sensory and motor neutrons. It connects the central nervous system to the rest of the body and detects and responds to change
Nerve cell that carry electrical messages
A bundle of neurons
Anything the body senses. They are detected by receptors
Organs or cells that detect changes in your external or internal environment. When a receptor detects a stimulus, it sends messages to the control centre. There are 4 receptors
Detects light. Cones detect colour and rods detect black and white colours
Detects mechanical forces such as pressure or vibration
Receives messages from the receptors and uses this information to decide what the body needs to do. The control centres send signals to parts of the bodies called effectors. Eg. Brain
Receives signals from the control centre. Eg. Glands, muscles
Eg. If it is cold outside, the muscles are the effectors and shivering is the response.
When the body acts against the stimulus
When the body amplifies the stimulus. Not useful in homeostasis but useful in childbirth and blood clotting.
Uses hormones such as adrenaline, oestrogen and testosterone. Response is slow and long lasting.
Acts as a bridge between the endocrine system and nervous system.
Main part of the neuron
Makes connections to other cells and receives chemical messages from other neurons
A cell that carries electrochemical messages along the cell
Fat and protein that helps to speed the transmission of a electrochemical message
A type of electrochemical message that travels along an axon
Carries nerve impulses away from the central nervous system