Christopher consumed food tainted with listeria monocytogenes. when this bacterium enters the digestive tract, it causes illness and sometimes death. what can the lymphatic system do to christopher fight this infection?

the spleen can remove listeria from the blood.
the thymus can produce b cells that target listeria.
the lymphatics can remove listeria from lymph.
the peyer's patches can release b cells to destroy listeria.

Why are slow-twitch muscles more beneficial than fast-twitch muscles for cardiorespiratory fitness?

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Which of these is the best example of sexual objectification? a) a female initiates a conversation with another female. b) a male proposes marriage to a female. c) a female makes repated coments to a male about his appearence. d) a female proposes marriage to a male.