Biological Bases of Behavior Flashcards
The body’s speedy electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous system
Nervous System
The brain and spinal cord
Central nervous system
Connects the CNS to the limbs and organs, essentially serving as a communication relay going back and forth between the brain and the extremities
Peripheral nervous System
The division of the PNS that controls the glands and the muscles of the internal organs. Controls the sympathetic and parasympathetic nervous systmes
Autonomic Nervous System
The division of the Autonomic nervous system that arouses the body, mobilizing its energy in stressful situations. Fight or glight
Sympathetic nervous system
The division of the autonomic nervou system that calms the body conserving its energy rest and digest
Parasympathetic Nervous System
A simple automatic response to a sensory stimulus, such as the knee jerk response
Reflex
A nerve cell; the basic building block of the nervous system
Neuron
Neurons that carry incoming information from the sensory receptors to the brain and spinal cord
Sensory neuron
Neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs
Interneurons
Neurons that carry outgoing information from the brain and spinal cord to the muscles and glands
Motor neurons
The neurons life support center that also produces neurotransmitters
Soma
The busy branching extensions of a neuron that receive messages and conduct impulses toward the cell body
Dendrite
The extension of a neuron, ending in branching terminal fibers through which messages pass to other neurons, muscles, or glands
Axon
A layer of fatty tissue that covers the axon which aides in the speed of neural impulses; the thicker this thing is the faster the neural impluses
Myelin sheath
A neural impulse; brief electrical charge that travels down an axon
Action potential
Electrically charged atoms
Ions
The fluid interior of a resting axon has an excess of negatively charged ions, while the fluid outside the axon membrane has ore positively charged ions
Resting potential
During the resting state of a neuron when the outside is positively charged and the inside is negatively charges
Polarized
Axon is no longer resting at potential; outside is now negatively charged and inside is now positively charged
Depolarized
Resting state after firing in which the neuron goes back to its polarized resting state
Refractory period
Accelerates neurons firing speed
Excitatory