A child develops symptoms of chicken pox, produces antibodies against its specific antigens, and recovers from the illness. Later as an adult, he is immune to another exposure to the chicken pox virus. This is an example of which type of immunity?
A) artificially induced active immunity
B) naturally acquired passive immunity
C) artificially induced passive immunity
D) innate (nonspecific) immunity
E) naturally acquired active immunity
E) naturally acquired active immunity
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Llamas, which have three stomach compartments unlike the four in cattle, sheep, and goats, are called ________________________________________
Fill in the blank(s) with correct word
Use the key to choose the best answer.A. First item is greater than the second item.B. First item is less than the second item.C. First item is equal or nearly equal to the second item.(1) Amount of bicarbonate in the aqueous component of pancreatic juice(2) Amount of bicarbonate in the enzymatic portion of pancreatic juice
Fill in the blank(s) with the appropriate word(s).
An antibacterial enzyme that is present in saliva, tears, and sweat is
A. lysozyme. B. antibodies. C. antigen. D. interferon.
Nicholas is prone to sinus infections. Lately his mother has noticed he doesn't seem to hear her when she is standing behind him. Which of the following best explains Nicholas's condition?
A. Nicholas's sinus infection would not affect his hearing, and he is just ignoring his mother. B. Fluid associated with Nicholas's infection is inhibiting movement of the auditory ossicles, resulting in conductive hearing loss. C. Nicholas's sinus infection is compressing nerves that transmit action potentials from the ear to the brain. D. Bacteria from the sinus infection have disrupted normal action potential propagation, causing damage to the spiral organ.