Of the pathogenic organisms, which of the following are the most complex?
Viruses
Tapeworms
Bacteria
Protozoa
The Correct Answer is B
A. Viruses: Viruses are the simplest pathogens, consisting only of genetic material and a protein coat.
B. Tapeworms: These are the most complex because they are multicellular animals (helminths) with specialized organ systems for reproduction and attachment.
C. Bacteria: These are single-celled prokaryotic organisms, which are more complex than viruses but less complex than multicellular animals.
D. Protozoa: These are single-celled eukaryotic organisms; while complex for a single cell, they lack the tissue and organ complexity of a worm.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"B"}
Explanation
A. positive: The outside of the neuron is more positive due to a higher concentration of sodium ions (Na+).
B. negative: During the resting membrane potential, the inside of the neuron is negatively charged (typically -70mV) relative to the outside, largely due to internal proteins and the leakage of potassium.
C. equal: If the charge were equal, there would be no membrane potential, and the neuron could not fire an impulse.
D. None of the above: Incorrect, as choice B is the standard physiological fact.
Correct Answer is D
Explanation
A. no movement of water or glucose: At dynamic equilibrium, movement does not stop; rather, it happens at equal rates in both directions.
B. movement of glucose but not water: If the membrane is permeable to both, both will move to equalize concentrations.
C. movement of water but not glucose: If the membrane is permeable to both, both will move to equalize concentrations.
D. an even exchange of material: Particles continue to cross the membrane, but there is no net change in concentration because the rate of movement is equal in both directions.
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