Neurons
This part of the neuron is responsible for receiving signals from other neurons.
Dendrite
The minimum membrane potential that must be reached to trigger an action potential.
What is threshold?
This division of the peripheral nervous system controls voluntary movements.
What is the somatic nervous system?
This part of the eye is responsible for focusing light onto the retina.
What is the lens?
The structure in the ear that converts sound vibrations into neural signals.
What is the cochlea?
The long thread-like part of a neuron that transmits impulses away from the cell body.
What is the axon?
This phase occurs when potassium leaves the neuron.
What is repolarization?
This subsystem is responsible for the 'fight or flight' response.
What is the sympathetic nervous system?
This structure causes the blind spot.
What is the optic nerve?
This structure is involved in dynamic equilibrium.
What are the semicircular canals?
This produces the myelin sheath of a neuron.
What is a Schwann cell?
In saltatory conduction, impulses “jump” between these structures.
What are nodes of Ranvier?
This part of the brain is involved in coordination and balance.
What is the cerebellum?
These cells in the retina are responsible for color vision.
What are cone cells?
These are the smallest bones in the human the body.
What are the ossicles?
The junction between two neurons where neurotransmitters are released.
What is a synapse?
This ion rushes into the neuron during the depolarization phase of an action potential.
What is sodium?
This structure connects the brain to the spinal cord and controls vital functions like breathing.
What is the medulla oblongata?
This type of lens is used to correct hyperopia.
What is concave?
This membrane-covered opening transmits vibrations into the cochlea.
What is the oval window?
These structures transmit signals from the central nervous system to muscles and glands.
What are efferent nerves?
This neurotransmitter is broken down by cholinesterase at the synapse.
What is acetylcholine?
The protective layers that cover the brain.
What are the meninges?
This structure in the eye is responsible for the pupillary reflex.
What is the iris?
In a cochlear implant, this structure is bypassed to stimulate the auditory nerve directly.
What are the hair cells of the organ of Corti?