← Psych Ch. 3A Test
5 Written Questions
5 Matching Questions
- peripheral nervous system (PNS)
- action potential
- a a neural impulse; a brief electrical charge that travels down an axon
- b the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body
- c the sensory and motor neurons that connect the central nervous system to the rest of the body
- d the extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles or glands
- e the level of stimulation required to trigger a neural impulse
5 Multiple Choice Questions
- the division of the autonomic nervous system that calms the body, conserving its energy
- the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations
- "morphine within"--natural, opiatelike neurotransmitters linked to pain control and to pleasure.
- neurons that carry outgoing information from the brain and spinal cord to the muscles and glands.
- chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, they travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse.
5 True/False Questions
nervous system → the body's speedy, electrochemical communication system, consisting of all the nerve cells of the peripheral and central nervous systems
pituitary gland → a pair of endocrine glands that sit just above the kidneys and secrete hormones (epinephrine and norepinephrine) that help arouse the body in times of stress
interneurons → neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and the motor outputs
central nervous system (CNS) → the sensory and motor neurons that connect the central nervous system to the rest of the body
reflex → bundled axons that form neural "cables" connecting the central nervous system with muscles, glands, and sense organs