Which of the following cell types migrates to the lymphoid tissue after encountering pathogens in the skin or the mucous membranes?
A. Macrophages
B. Dendritic cells
C. Mast cells
D. None of the choices are correct.
Answer: B
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The coding regions of a gene are known as ________.
Fill in the blank(s) with the appropriate word(s).
Which two food chains are characteristic of nearly all food webs?
a. Grazing, carnivorous b. Producing, carnivorous c. Grazing, detrital d. Detrital, producing e. Producing, decomposing
One way to produce a vaccine is to heat a virus or bacteria and then inject the inactive pathogen as a vaccination. How would the heat inactivate a virus?
A. by inhibiting its metabolism B. by destroying the membrane C. by blocking facilitated diffusion D. by denaturing proteins E. All of the answer choices are correct.
Tissue fluid leaving the arterial end of the capillary is balanced by tissue fluid entering the venous end of the capillary.
Answer the following statement true (T) or false (F)