Flashcards in Chap. 3 - neuroanatomy, neurophysiology, behavior Deck (96)
The primary function of the nervous system
To transfer and exchange information
The basic cellular unit of the nervous system
What does a neuron do, primarily?
Three components of the neuron
The soma contains...
The axon (or stem) does what?
Transmits signals away from the soma to connect with other neurons and cells
The function of dendrites
To collect incoming signals and to send the signal toward the soma
Two divisions of the nervous system
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
Two components of the CNS
The PNS connects the CNS to _____, _____, and _____
Receptors, muscles, and glands
When the cranial nerves exit the brain stem, they are part of the _____ Nervous System
The PNS is composed of two systems:
Somatic Nervous System
Autonomic Nervous System
The somatic nervous system conveys info to _____ _____ and is responsible for _____ _____
The autonomic nervous system - 3 functions
Convey info from CNS to smooth muscle, cardiac muscle, and glands
Responsible for involuntary movement
Autonomic nervous system - two divisions
Sympathetic nervous system
Parasympathetic nervous system
Sympathetic nervous system - excitatory or inhibitory? Increase or decrease organ activity?
Parasympathetic nervous system - excitatory or inhibitory? Increase or decrease organ activity?
Sympathetic nervous system is "_____ __ _____" and parasympathetic is "_____ __ _____"
Fight or flight
Rest and digest
The myelinated axons of neurons
Nerve cell bodies and dendrites
The "working area" of the brain containing the synapses
Why is the brain wrinkled?
To increase surface area, thus working area and cell communication
Small shallow grooves on the brain's surface
Deeper grooves extending into the brain
Raised tissue areas on the brain
Two parts of the brain
Which hemisphere of the cerebrum is dominant in most people?
The left (it controls right sided movement)
The two hemispheres are connected by the _____ _____, which is composed of _____ matter
The four lobes of the cerebral hemispheres
Frontal lobe functions include (6)
Motor function (voluntary)
Premotor area (coordination of multiple muscles)
Association cortex (memory and decision making)
Expressive speech (Broca's area)