Functions of Neuron Parts
Cell body
Contains genetic information, maintains structure and provides energy to drive activities.
Node of Ranvier
facilitates the rapid conduction of nerve impulses
Receptor
Senses a stimulus
Cornea
A window that lets light into the eyes
Central Nervous System
Sends messages to your body through nerves
Dendrites
Receive communication from other cells
Myelin Sheath
insulates nerves, allowing electrical impulses to transmit quickly and efficiently along the nerve cells
Sensory neuron
Pupil
Allows light into the eye.
Peripheral Nervous system
Relays information from spinal cord to organs and limbs (branches out from CNS)
Axons
Electrical impulses from the neuron travel through here to be received received by other neurons
Spinal Cord
Conducts messages from brain to body and governs involuntary reflexes
Motor Neuron
Sends directions back to the site of the stimulus
Lens
Focuses light onto the retina at back the back of the eyeball
Somatic Nervous System
Guides voluntary movements
Axon Terminals
Release the neurotransmitters
Cerebral Cortex
Rules voluntary movements
Integration Center
Decodes the signal
Cones
Detect fine color and require bright conditions
Autonomic Nervous System
Controls involuntary activities
Nucleus
Contains the nucleolus and chromosomes
Corpus Callosum
How the two hemispheres communicate (they are myelinated axon fibers)
Effector Cells
Respond to stimulus by contracting or secreting
Rods
Mainly register black and white
Difference between sympathetic and Parasympathetic nervous systems
Sympathetic deals with crisis and sounds internal alarms while parasympathetic calms you down and conserves energy