BMED 4280 CFUs Flashcards

Common circuit motifs that mediate the spinal stretch reflex include all of the following EXCEPT:

The process by which a neuron summates synaptic excitation and inhibition is called:

The network motif that underlies circadian rhythms is:

An auto-association network is important for:

Drug X, when applied to a nerve axon, results in both a gradual decrease in the amplitude of individual action potentials and a depolarization of the resting potential, both of which develop over a period of several hours. The drug is most likely:

If a nerve membrane suddenly became equally permeable to both Na+ and K+, the membrane potential would:

If the concentration of K+ in the cytoplasm of an invertebrate axon is changed to a new value of 200 mM (Note: for this axon normal [K]o = 20 mM and normal [K]i = 400 mM):

An endplate potential in a skeletal muscle cell could in principle be produced by a decreased permeability to which of the following ions(s)? (Assume that there is a finite initial permeability to each of the ions listed below and that physiological concentration gradients are present.):

In a normal, healthy individual the number of ACh-sensitive channels in a skeletal muscle cell opened as a result of a single action potential in a motor axon would be approximately...

An isolated nerve muscle preparation treated with a moderate dose of curare would be associated with a decrease in the (NOTE: there is more than one correct answer.)

An isolated nerve muscle preparation exposed to a low concentration of extracellular Ca2+ would be associated with a decrease in the (NOTE: there is more than one correct answer.)

Which of the following cell types proliferate in the CNS in response to injury? (Note: There is more than one correct answer.)

Which of the following cell types is responsible for the maintenance of pH of the extracellular space of the CNS? (Note: There is more than one correct answer.)

All of the following are guidance cues for axonal outgrowth and pathfinding EXCEPT:

Agrin:

Which of the following is a guidance cue for axonal outgrowth and pathfinding?

Synapses...

Which of the following processes dictate the amount of neurotransmitter released from a nerve ending on a short-term, minute-to-minute, basis? (NOTE: there is more than one correct answer.)

match the receptor and sensation

Golgi Tendon Organ

match the receptor and sensation

meissner corpuscle

match the receptor and sensation

merkel complex

match the receptor and sensation

free nerve endings

match the receptor and sensation

pacinian corpuscle

C fibers

A-delta fibers

A-beta fibers

. The neospinothalamic tract crosses the midline in which of the following structures?

The medial lemniscus crosses the midline at which level of the nervous system?

All of the following are released in response to noxious stimulation at the damaged site(s) EXCEPT:

C fibers transmit which type of pain?

C fibers are...

Aspirin acts to block the formation of..

A-delta fibers transmit primarily

Pain receptors/nociceptors are

Double pain sensation results from

A-delta fibers transmit which type of pain to VPL

Sharp pain, induced by a skin cut for example, is classified by

Mr. John Thomas experiences visceral pain around the upper left lung. All of the following carry this nociceptive information EXCEPT the:

A surgeon attempting to treat chronic pain from the pelvic region will suggest to make a lesion in the:

In Brown-Sequard syndrome:

sharp localized pain is transmitted by

pain impulses arising within the abdominal and thoracic cavities may reach the CNS by:

somatic nerves innervating

sympathetic nerves

parasympathetic nerves

none of the above

all of the above

At the level of the ventral trigeminothalamic tract, pain fibers are generally crossed or uncrossed?

Cell bodies of first order pelvic visceral pain fibers are found in

The following pathway is sectioned in a chordotomy for the treatment of pain:

according to the descending pain suppression theory..

the melzack-wall gate theory refers to:

electrical stimulation in the periaqueducatal gray elicits:

the following nuclei are involved in the serotonergic descending modulation system of pain:

All of the following is characteristic of the cornea of the eye EXCEPT:

Which of the following account for the ability of rod bipolar cells to detect and signal light at lower illumination levels than cone bipolar cells?

Which of the following are characteristic of the primary visual cortex "blob" neurons? They:

Make the best match between the listed condition and the visual field defect.

occlusion of the left posterior cerebral artery

Make the best match between the below listed condition and the visual field defect.

trauma to the left temporal lobe

Make the best match between the below listed condition and the visual field defect.

lesion of the optic chiasm

Which of the basal ganglia nuclei receive direct cortical input?

All of the following statements about the basal ganglia are correct EXCEPT:

A. The net effect of excitation of the direct pathway is to inhibit cortex.

B. Dopaminergic neurons of the substantia nigra signal unexpected reward or unexpected absence of reward.

C. The basal ganglia have both motor and cognitive functions.

D. The subthalamic nucleus is the origin of the only purely excitatory pathway within the basal ganglia intrinsic circuitry.

E. Parkinson's disease results from damage to the basal ganglia

The spinocerebellum contains the...

The lateral vestibular nuclei are functionally analogous to the...

The postcommissural fornix projects to which structure?

Which structure is NOT part of the Papez circuit?