Nervous System Overview
This part of the nervous system acts as the control center, overseeing communication among organ systems.
CNS (Central Nervous System)
The main receiving region of a neuron is called this.
Dendrites
The division of the PNS that contains motor nerve fibers
Motor division
Vision
The transparent structure in the eye that focuses light onto the retina is called this.
Lense
The title that the nervous system is considered as, meaning that it oversees all communication among the organ systems
Ultimate Control Center
The part of the neuron that generates and transmits nerve impulses is this.
The axon
Reflexes can be classified as innate or this, which are learned through practice or experience.
Acquired reflexes
The receptors responsible for detecting chemical stimuli in smell and taste are called this.
Chemoreceptors
The photoreceptors that detect color are called this.
Cones
This division of the PNS is responsible for voluntary movements.
Somatic Nervous System
These cells support neurons by providing them nutrition and insulation
Neuroglia or glial cells
This division of the PNS regulates involuntary functions like heart rate and digestion.
Autonomic Nervous System
The ear is responsible for these two primary functions.
Hearing and balance
This part of the retina provides the sharpest vision.
Fovea
This neurotransmitter is released in the sympathetic nervous system for stimulation or inhibition.
Norepinephrine
Gaps in the myelin sheath that speed up nerve conduction are called this.
Nodes of Ranvier
Parasympathetic division
These tiny bones in the middle ear amplify sound waves.
Auditory ossicles
The colored part of the eye that controls the size of the pupil is called this.
The brainstem coordinates these functions like respiration and circulation.
Automatic function
This type of neuron transmits signals from sensory receptors to the CNS.
Sensory or Afferent Neurons
The nerves that originate in the brain are considered this.
Cranial nerves
This organ converts sound vibrations into electrical impulses using "hair" cells.
Cochlea
This is the layer of the eye that contains blood vessels and supplies nutrients to other layers.
Choroid