Compare and contrast the nature of the pathogens in bacterial and viral infection.
What will be an ideal response?
Bacteria are independent cells with DNA that can survive and reproduce outside a host. Viruses are not cells, but
rather are small pieces of DNA or RNA enclosed in a protein coat. Viruses can only survive and reproduce inside a
host cell. Bacteria are susceptible to antibiotics. Viruses are treated with antiviral drugs.
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The various classes of immunoglobulins are differentiated on the basis of their
A) asymmetry. B) antigen specificity. C) light-chain variable segments. D) heavy-chain constant segments. E) reactivity.
Orbicularis oris, orbicularis oculi, and platysma are part of the group of muscles known as muscles of
A) the extra-ocular region. B) facial expression. C) the tongue. D) the pharynx. E) mastication.
If neuron X is repeatedly stimulating neuron Z with an excitatory neurotransmitter, then
a. several simultaneous action potentials might be initiated on neuron Z b. the membrane potential on neuron Z would increase c. spatial summation would be occurring on neuron Z d. the postsynaptic neuron in this situation would have to reach threshold voltage e. none of the above would have to occur