Which of the following types of immunity do you expect would be the most effective in preventing a particular illness for a long period of time and why? (2 points)

active immunity: it allows the body to gain antibodies from several other outside sources.
active immunity: it allows development of memory cells that can later fight infection.
passive immunity: it requires less energy to be expended by the individual overall.
passive immunity: it does not require the body to be subjected to repeated vaccine injections.

Active immunity: it allows development of memory cells that can later help fight infection.
D If a person eats hurriedly and barely chews his food before swallowing it, what effect will it likely have on his stomach? His stomach will have to excrete enzymes to digest carbohydrates as well as those to digest protein. His stomach will pass the food directly on to his large intestine without digesting it. His stomach will become infected because there was not time for his saliva to sterilize his food completely. His stomach will take longer to grind the food into chyme than if he had ground it well with his teeth.