test 5 Flashcards
(29 cards)
What are the functions of the nervous system?
voluntary/involuntary contractions, regulates (smooth/cardiac muscle, gland secretions, adipose tissue)
What makes up the central nervous system?
brain and spinal cord
Which nervous system controls skeletal muscles?
somatic nervous system (SNS)
What are the functions of neuroglia?
separate and protect neurons, supportive framework for nervous tissue, act as phagocytes, regulate composition of interstitial fluid
What are oligodendrocytes?
cells with sheet-like processes that wrap around axons
What are Ependymal cells?
simple cuboidal epithelial cells that line fluid filled passageways within the brain and spinal cord
What are microglia?
phagocytes that move through nervous tissue removing unwanted substances
What is the most abundant class of neuron in the CNS?
Multipolar neurons
What are telodendria?
the main axon trunk, communicate with other cells
What is the main differences between the following channels: active, gated and leak?
What is the all-or-none principle
the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus
What is special about type A nerve fibers
What types of neurotransmitters are released from Cholinergic synapses, from Adrenergic synapses?
The effect that a neurotransmitter has on the postsynaptic membrane depends on what?
excitatory postsynaptic potentials occur when
inhibitory postsynaptic potentials are what kind of effect on local polarization
What are neruoglia and how much of the nervous system do they account for?
In the spinal cord, white matter is separated into ascending and descending tracts organized as what
What are spinal meninges?
The outward projections from the central gray matter of the spinal cord are called what
Spinal nerves are: purely sensory, purely motor, both, neither?
Know what areas of muscle the cervical and sacral regions innervate.
What are all the ways reflexes can be classified?
What does a tendon reflex do?
