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Assignment Details:

• Referencing Styles : Not Selected
• Words : 12*250
• Course Code: MMED2933
• Course Title: fundamental neuroscience
• University: Flinders University
• Country: AU

Task

Multiple Choice Questions

1. Which of the following is/are the defining feature(s) of viscerofugal neurons?

A. Their axons project to the submucous plexus
B. They have a cell body in the gut wall and an axon which projects outside the gut
C. They mostly have Dogiel type II morphology
D. They have a cell body in a sympathetic ganglion and an axon which projects to the gut
E. Their axons project into the spinal cord

2. It is possible to monitor activity in the population of viscerofugal neurons by recording fast excitatory post-synaptic potentials (fast EPSPs) in which nerve cells?

A. In Dogiel type II/AH neurons of the gut
B. In Dogiel type I/S neurons of the gut
C. In nerve cell bodies in paravertebral ganglia
D. In nerve cell bodies in prevertebral ganglia
E. In dorsal root ganglion neurons

3. Which types of synaptic inputs are viscerofugal neurons known to receive?

A. Inhibitory post synaptic potentials (IPSPs) from prevertebral ganglion sympathetic neurons
B. Fast excitatory post synaptic potentials (fEPSPs) from prevertebral ganglion sympathetic neurons
C. Slow excitatory post synaptic potentials (sEPSPs) from prevertebral ganglion sympathetic neurons
D. Fast excitatory post synaptic potentials (fEPSPs) from other enteric neurons
E. Slow excitatory post synaptic potentials (sEPSPs) from dorsal root ganglion sensory neurons

4. Cholinergic fast excitatory post synaptic potentials (fEPSPs_ can be blocked by which of the following:

A. Atropine
B. Nicardipine
C. Hexamethonium
D. DMPP
E. DiI

5. Which of the following ions is not present in the Krebs solution used in this study?

A. HSO4
B. Na+
C. HCO3
D. Ca++
E. Mg++

6. DiI, which fluoresces red, was used to retrogradely fill the cell bodies of viscerofugal neurons. A second dye, 5,6 carboxy-fluorescein, which fluoresces green was added to the intracellular microelectrode solution and also used to fill the viscerofugal nerve cell body. At first sight, this seems to be unnecessary/overkill. What was the major advantage of using 5,6 carboxy-fluorescein to fill the neuron?

A. The presence of carboxyfluorescein in the DiI-filled cell proves that the right enteric neuron (ie: a viscerofugal neuron) was recorded
B. Carboxy fluorescein is brighter than DiI
C. Carboxy fluorescein is water-soluble whereas DiI is soluble in ethanol
D. Carboxy fluorescein is more permanent than DiI in the tissue
E. Carboxy fluorescein fades more slowly than DiI