Upgrade to remove ads
BIO 141 Chapter 11: Intro to Nervous System Lecture Summary: Final Exam
Terms in this set (54)
part of neuron that communicates with target cell and is the secretory region?
axon terminals (synaptic knobs)
Neuroglia would be more likely to form a brain tumor because of their ability to rapidly
divide following brain injury
Multipolar is the most common type of neuron in the human body
Brain and spinal cord
organs of CNS
the direction in which an electrical signal is carried in a
typical multipolar neuron
Dendrites, cell body, and axon .
astrocytes help build
blood brain barrier
effectors controlled by the somatic motor division
The autonomic nervous system does not carry signals to
Bundles of axons known as tracts are part of the
Regulation of heart rate, blood pressure, and digestive functions are carried out by the
autonomic nervous system
clusters of cell bodies within PNS
CELL BODY must be intact for a
neuron to regenerate in the PNS
what neuron structure does not contain protein making organelles?
What cell type forms the myelin sheath in the CNS?
What is the most metabolically active part of the neuron?
Most sensory neurons such as the ones found in the special sense organs are structurally
What forms the white matter of the spinal cord?
myelinated nerve cell processes (or axons)
Which division of the PNS carries signals from bones, joints, skin, and organs of vision to the CNS?
What structure found in the PNS promotes regeneration of a damaged axon?
What structure contains the bulk of the Schwann cell's cytoplasm and organelles?
Ependymal cells function to
circulate cerebrospinal fluid
The majority of neurons are functionally classified as
What neuroglial cells surround and support the cell bodies of neurons and have
intertwined processes that link them with other parts of the neuron?
What type of neuron carries information toward the CNS?
calcium triggers synaptic vesicles to
release neurotransmitters into the synaptic cleft
an action potential
ion channel that's always open?
R.M.P maintained by Na + /K + ATPase =
2 K+ --> cytosol &
3 Na+ --> extracellular fluid
The majority of synapses in the nervous system are chemical
influx of + charges makes the membrane potential more +
During saltatory conduction, action potentials are generated only at
nodes of Ranvier of myelinated axons
Which of the following events occurs when EPSPs arrive rapidly at a single synapse?
potential gets more negative,
-70 mV to -85 mV.
Ligand-gated channel opens in response to a chemical binding to a receptor on the
Resting membrane potential of a typical neuron is
voltage-gated channels are most abundant in
Absolute refractory period
nerve fiber can't produce additional action potential no matter how strong the stimulus
delivers a message to a target cell
Influx of Chloride ions can cause
an IPSP to be produced
What channels open in response to changes in membrane potential?
temporary change, makes it less negative or more positive
Which of the following characteristics is the fundamental process for most functions of the nervous system?
Cholinergic synapses use the neurotransmitter acetylcholine
substance P (neuropeptide neurotransmitter) is released from
fibers transmitting sensory
information about pain and temperature
elicit much slower, but effects are longer lasting and more varied
Which neurotransmitters is not a catecholamine?
SEROTONIN is the major neurotransmitters involved in
and is target in the
treatment of depression
The most important excitatory neurotransmitter in the brain
Which neurotransmitter is widely used by the autonomic nervous system (ANS), where it
influences functions such as heart rate, blood pressure, and digestion?
Which pair of neurotransmitters are strictly inhibitory?
Glycine and GABA
What change in membrane potential is caused when glycine and GABA stimulate the
opening of chloride ion channels?
Identify the 4 parts of a neuron
B. cell body
C. axon? node of rhanier?
D. axon terminal?
excitatory post synaptic potential
inhibitory postsynaptic potential
YOU MIGHT ALSO LIKE...
Bio SAT Nervous System
MCAT Kaplan - Nervous System
Honors Anatomy and Physiology -- Chapter 8 Vocabul…
Nervous System Cells (HONORS)
OTHER SETS BY THIS CREATOR
PHI 227- 3 possible short essay questions
PHI 227 Chapter 13 Vocab
PHI 227 Chapter 12 Vocab
PHI 227 Chapter 11 Vocab