Chapter 2: Quiz Flashcards
Cells that transmit information within the nervous system.
neurons
An insulating layer covering an axon that allows for faster neural impulses.
myelin sheath
A naturally occurring chemical in the nervous system that specializes in transmitting information between neurons.
neurotransmitter
The microscopic gap between neurons across which neurotransmitters travel to carry their messages to other neurons.
Synaptic Gap (synapse)
The brain and spinal cord.
central nervous system
The part of the nervous system that links the CNS with the body’s sensory receptors, muscles, and glands
peripheral nervous system
Neurons that integrate information within the CNS through their communication with each other and between sensory and motor neurons in the spinal cord.
inter neurons
Neurons in the PNS that carry information to the CNS from sensory receptors, muscles, and glands
sensory neurons
neurons in the PNS that carry movement commands from the CNS out to the rest of the body.
motor neurons
The conduit between the brain and the PNS for incoming sensory data and outgoing movement commands to the muscles.
spinal cord
A simple automatic action of the spinal cord not requiring involvement of the brain, such as the knee- jerk reflex.
spinal reflex
The part of the PNS that carries sensory input from receptors to the CNS and relays commands from the CNS to skeletal muscles to control their movement.
somatic nervous system
The part of the PNS that regulates the functioning of our internal environment (glands and organs like the heart, lungs, and stomach.)
autonomic nervous system
The part of the autonomic nervous system that is in control when we are highly aroused, as in an emergency, and need to prepare for defensive action.
sympathetic nervous system
The part of the autonomic nervous system that returns the body to its normal resting state after having been highly aroused, as in an emergency.
parasympathetic nervous system
The body’s other major communication system. Communication is achieved through hormones that are secreted by the endocrine glands and travel through the bloodstream to their target sites.
endocrine glandular system
A chemical messenger that is produced by an endocrine gland and carried by the bloodstream to target tissues throughout the body.
hormone
A complex psychological state that involves a state of physiological expression of the emotion, and a cognitive appraisal of the situation to determine the specific emotion and its intensity.
emotion