Which of the Following Is Correct About Salmonella and Shigella

question 13

Multiple Choice

Which of the following is correct about Salmonella and Shigella?

• A) They both produce shiga toxin.
• B) They are Gram-positive rods.
• C) They are resistant to gastric acid.
• D) They cause typhoid fever.
• E) They are facultative intracellular pathogens.

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Definitions:

Reuptake

A process by which neurotransmitters are absorbed back into a neuron after having been released into a synapse, thus terminating the transmission of signals.

Excitatory PSPs

Excitatory postsynaptic potentials are increases in potential that bring a neuron closer to the threshold for firing, facilitating the transmission of signals.

Inhibitory PSPs

Post-synaptic potentials that make a post-synaptic neuron less likely to generate an action potential.

Absolute Refractory Period

A period immediately following the firing of a nerve fiber when it cannot be stimulated for a brief period, regardless of how strong the incoming stimulus may be.