Which type of immunity is temporary?
A. Active
B. Passive
Answer: B
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This figure shows the muscles of facial expression. What muscle does number 2 indicate?
A. Nasalis B. Procerus C. Epicranius D. Orbicularis oculi E. Platysma
Chloride ions
A. are cations. B. are found only inside cells. C. are part of the DNA molecule. D. are regulated with Na+. E. are not found in extracellular fluid.
The respiratory center gathers information from a variety of sources in order to set the rate and depth of breathing. This is an example of what type of neural circuit?
A. Reverberating B. Divergent C. Convergent D. Parallel after-discharge
The skin and mucous membranes can be considered as a ________, a part of innate immunity.
A. chemical mediator B. cellular mechanism C. mechanical barrier D. None of these choices are correct.