Nervous System Review: Functions Question Preview (ID: 36934)


Review. TEACHERS: click here for quick copy question ID numbers.

The nervous system can be divided anatomically into the _____ and _____; and functionally into the ____ and ____
a) central/ peripheral; somatic/ autonomic
b) brain/ spinal cord; cranial and peripheral nerves
c) afferent/ efferent; superior / inferior
d) profound/ superficial; sensory / motor

components of neural pathways headed towards the CNS are said to be
a) afferent
b) efferent
c) intrinsic
d) extrinsic

the ____________ or __________ function is performed by the CNS
a) integrative / associative
b) sympathetic / parasympathetic
c) sensory / motor
d) afferent/ efferent

_______ are the functional unit of the nervous system: they are supported by _____ cells
a) neurons, neuroglial
b) nerves, ependymal
c) axons, schwann
d) oligodendrocytes, funnicular

nerve signals, called________, travel along the nerve in the form of a(n) _______ ________
a) impulses, action potential
b) datum, actualized realization
c) transductions, energy pulse
d) semaphoreons, light beam

the 'strength' of a signal in the nervous system is modulated by _________
a) rate of impulses or number of neurons carrying them
b) increase in the amplitude of the action potential (voltage)
c) the duration of each action potential (milliseconds)
d) the total ion flux from the axon of the neuron

the resting potential is due to
a) fixed anions and differential concentrations of potassium and sodium ions
b) fixed cations and differential permeability to chloride and hydrogen ions
c) fixed anions and differential permeability to chloride and hydrogen ions
d) fixed cations and differential concentrations of potassium and sodium ions

the respective concentration gradients that maintain the 'resting' potential are actually due to the tireless work of ________, which require
a) Sodium/ Potassium pumps, energy in the form of ATP
b) Chloride symport channels, gap junctions
c) ion gated sodium / potassium channels, a chloride gradient
d) Sodium Chloride antiports, water

when the resting potential of the membrane rises to about -55mV, it reaches _________, and ______ channels open, further depolarizing the membrane
a) threshold, voltage gated sodium
b) climax, ligand gated potassium
c) anipode, ion gated chloride
d) equilibrium, voltage gated potassium

conduction velocity of a nerve impulse can be increased by
a) myelination and/or increasing the diameter of the axon
b) increasing the sodium/ potassium gradient and/or the volume of the cell body
c) increasing the number of voltage gated ion channels and/ or increasing the ion concentration gradient
d) increasing the temperature of the axon and/ or reducing the viscosity of the cytoplasm

oligodendrocytes in the CNS perform the same function as _______ cells in the PNS, namely ____
a) neurilemma, forming the myelin sheath
b) satellite cells, providing nourishment to the neurons
c) microglia, immune protection
d) ependymal cells, formation of CSF

Astrocytes maintain the ___ ___ ____ with their perivascular 'feet'
a) blood brain barrier
b) resting membrane potential
c) cerebro spinal fluid
d) ventricular fluid osmolarity

myelin consists mainly of _______, and produces the visual effect behind _____ _____ in the CNS
a) lipids, white matter
b) proteins, grey matter
c) carbohydrates, pia mater
d) actin fibers, arachnoid layer

upon reaching the end of the axon, nerve impulses are 'converted' to chemical signals via the release of ______ into the ______
a) neurotransmitters, synaptic cleft
b) hormones, blood stream
c) positive ions, gap junctions
d) vesicles, post synaptic cell

release of neurotransmitters, via fusion of vesicles with the cell membrane, is triggered by
a) influx of calcium ions
b) electrostatic conformational change in membrane proteins
c) phosphorylation of carrier proteins
d) outflow of chloride ions

if the receptor on the post synaptic cell responds to binding of its cognate neurotransmitter by opening itself to the passage of ions, it is...
a) a ligand gated ion channel
b) very unusual- most receptors depolarize directly
c) a G-protein complex
d) an ion gated ligand channel

post synaptic receptors can trigger either depolarization (an________) or hyperpolarization (an ______)
a) EPSP, IPSP
b) IPSP, EPSP
c) GABA, PABA
d) PABA, GABA

Nicotinic receptors on the motor end plate of skeletal muscle cells respond to
a) Acetylcholine (ACh)
b) Norepinephrine (Ne)
c) Serotonin (Srt)
d) Filgratimalanonanosinase (FGMALSE)

As Alzheimer's disease involves (among other things) loss of cholinergic neurons, drugs like Donepezil, which is a(n)_______, may ease symptoms
a) Acetylcholinesterase inhibitor
b) Muscarinic Receptor Agonist
c) Dopamine Precursor Molecule
d) Acetylcholine Specific Reuptake Inhibitor (ASRI)

Long Term Potentiation of synapses in the formation of memories involves the activation of _______, which trigger the recruitment of additional AMPA receptors AND the formation of additional glutamate bearing vesicles in the pre synaptic cell
a) NMDA receptors
b) GABA globulin
c) G-protein mediated cAMPpathways
d) apoptosis genes

Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 36934 in the upper right hand corner or click here.

TEACHERS / EDUCATORS
Log In | Sign Up / Register

Help / Support / FAQ




Gaming Links