Nervous System Quiz Flashcards
Sensory neuron
Picks up internal or external stimuli and converts it into a nerve; then sends it to the Interneuron
3 types of neurons
Sensory neuron
Interneuron
Motor neuron
Interneuron
The brain/spinal cord. Takes impulse and interprets it. Decides if further action should be taken, then sends message, if necessary to the motor neuron
Motor neuron
Takes impulse form Interneuron and sends it to a muscle or gland (effector)
The muscle or gland contracts on response or a gland releases a hormone
Pathway an impulse takes from a stimulus to an effector
Stimulus, receptor, sensory neuron, interneuron, motor neuron, effector
Purpose of the nervous system
Receives info
Responds to info
Maintains homeostasis; a steady rate where our body’s function best
Stimulus
What causes the nervous system
Internal or external
Receptor
What receives the stimulus
If external stimulus, the receptor is a sense organ (eyes, ears, ect.)
Effector
What responds to the stimulus ALWAYS a muscle or gland
Neuron
Nerve cell- carries messages throughout body
Nerve impulse
Electrical to chemical signal that travels from one neuron to another
The path an impulse takes down a neuron
Dendrite, cell body, axon, axon tips, synapse
Myelin
- protects axon
- speeds up the impulse
Node of Ranvier
The impulse hops into this after going over the myelin
Dendrite
Takes signals to cell body
