The immune response that targets one's own body tissues is known as a(n) ___________.
A. acute illness
B. allergen
C. autoimmune response
D. cell-mediated immune response
E. antibody-mediated immune response
Answer: C
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Tadpoles must undergo a major metamorphosis to become frogs
This change includes reabsorption of the tail, growth of limbs, calcification of the skeleton, increase in rhodopsin in the eye, development of lungs, change in hemoglobin structure, and reformation of the gut from the long gut of an herbivore to the short gut of a carnivore. Amazingly, all of these changes are induced by thyroxine. What is the most likely explanation for such a wide array of effects of thyroxine? A) There are many different forms of thyroxine, each specific to a different tissue. B) Different tissues have thyroxine receptors that activate different signal transduction pathways. C) Some tissues have membrane receptors for thyroxine, while other tissues have thyroxine receptors within the nucleus. D) Different releasing hormones release thyroxine to different tissues.
Small pox
a. kills up to a third of all people it infects. b. kills over half of all people it infects. c. is only found in subtropical climates. d. was eradicated by 1850. e. is not described by any of these.
The average life span of a red blood cell is approximately
A. 15 days. B. 4 months. C. 1 month. D. 2 months. E. 6 months.
The MMR vaccination is for immunity to ________, ________, and ________.
What will be an ideal response?