Virus-invaded body cells and cancerous body cells are targeted by ____ T cells
a. helper
b. plasma
c. suppressor
d. killer
Answer : d. killer
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Catabolism of protein is not a practical source of quick energy because of all of the following except that
A) proteins are more difficult to break apart than lipids or carbohydrates. B) the energy yield from protein is less than the yield from lipids. C) one of the by-products of protein catabolism is ammonia. D) most individuals have little protein to spare before harming vital organs. E) extensive catabolism of protein threatens homeostasis.
The X shape of the optic nerves is called the ________.
A. cranial nerve X: Vagus B. macula C. optic chiasma D. optic disc
Body cells communicate with immune system cells through direct contact involving the sugary coatings on the cells' surfaces.
Answer the following statement true (T) or false (F)
The ________ muscle is located on the front of the lower leg.
A. gastrocnemium B. latissimus dorsi C. tibialis anterior D. hamstring