In order for a peripheral nerve fiber to regenerate it must have....
the soma and at least some neurilemma intact.
Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?
Inflow of chloride
Local potentials are_____, meaning they vary in magnitude according to the strength of teh stimulus.
When the voltage of a plasma membranes shifts from +35mV towards )mV, we say the cell is...
All of the following are typical characteristics of neurotransmitters except...
they are released into the bloodstream before reaching the postsynaptic cell.
_____binds to ligand-regulated gates, and is the most common inhibitory neurotransmitter in the brain.
y-aminobutyric acid (GABA)
Which of these happens first in teh cholinergic synaptic transmission?
Synaptic vesicles release acetylcholine.
Some antidepressant drugs act by inhibiting monoamine oxidase (MAO), which is an enzyme...
that breaks down monoamines.
All of these contribute to the cessation of the signal in a synaptic transmission except....
synaptic vesicles secrete neurotransmitter by exocystosis.
Even though all action potentials are the same, the brain can differentiate a variety of stimuli by source and intensity. The mechanism by which the nervous system converts these action potentials into meaningful information is called neural....
Inhibitory postsynaptic potentials (IPSPs) are associated with
hyperpolarization of the cell membrane.
The upper motor neurons that control skeletal muscles begin with a soma in...
the precentral gyrus of the cerebrum.
The signals that control your handwriting travel down the spinal cord in...
the corticospinal tracts.
Epidural anesthesia is introduced in the epidural space between the_____to block pain signals during pregnancy.
Dural sheath and vertebral bones
The ventral rami of the spinal nerves form nerve plexuses in all regions except...
the thoracic region.
The bundle of nerve roots that occupy the vertebral canal from L2 to S5 is called the....
Which of the following best describes the order of a somatic reflex?
Somatic receptor->afferent nerve fiber->interneuron->efferent nerve fiber->skeletal muscle.
A nurse pricks your finger to type your blood. You flinch at the pain, pulling your hand back. This is called....
flexor (withdrawal) reflex.
You go to the movies after a long day and you begin to nod off as soon as the movie starts. Your head starts to lower a little but this reflex causes yoru head to rise. This is called the...
stretch (myotatic) reflex.
A reflex where the sensory input and motor output are on opposite sides of the spinal cord is call a(n)______reflex arc.