Module 7-9 Vocab Quiz Flashcards
Nerves
Bundles of neuron axons and their covering, which are found outside the CNS
Ganglia
Collections of neuron cell bodies that are found outside the CNS
Peripheral nervous system
All the part of the nervous system that are not the CNS
Autonomic Nervous system
PNS neurons that transmit action potentials from the CNS to smooth muscles, cardiac muscles, and glands.
Somatic motor system
PNS neurons that transmit action potentials from the CNS to skeletal muscles.
Excitability
The ability to undergo an action potential in response to a stimulus.
Potential difference
A measure of the charge difference across the cell membrane
Gray matter
Collections of neuron cell bodies and their associated neuroglia
White matter
Bundles of parallel axons and their coverings
Decussation
The anatomical crossing over of neurons from left to right
Hypoxia
Hypoxia is the medical condition in which there is an inadequate oxygen supply.
Commissures
Connections of neuron axons that allow the two hemispheres of the brain to communicate with one another.
Cutaneous receptors
Receptors in the skin
Proprioceptors
Receptors in the skeletal muscles and tendons
Olfaction
The sense of smell
Gustatory
The sense of taste
Static equilibrium
Determines the orientation of the head relative to the pull of gravity. In other words, it helps the body determine whether the head is being held up straight, bowed, leaned to one side, and so forth.
Dynamic equilibrium
Helps determine the rotation and acceleration of the head. This allows us to maintain balance as we move.
Accommodation
Accommodation allows the eye to adjust focus from seeing things at a distance and tune itself to seeing nearer objects.
Pupil constriction
The eye constricts the pupil in order to let less light in, allowing a greater depth of focus.
