Mutations in polypeptides called ________ that are produced by cytotoxic T cells could prevent T cells from destroying infected cells.
A. interferons
B. antibodies
C. histamines
D. perforins
Answer: D
You might also like to view...
In the fetus, the blood from the umbilical vein is shunted away from the liver and sent to the inferior vena cava through the ductus ______________
Fill in the blank with correct word.
Match each system to an important function of the system.
a. integumentary system b. skeletal system c. muscular system d. nervous system e. endocrine system f. cardiovascular system g. female reproductive system h. respiratory system i. digestive system j. urinary system k. male reproductive system 1. _____ Absorbs nutrients 2. _____ Allows the body to move 3. _____ Protects underlying structures 4. _____ Produces sperm 5. _____ Recognizes sensory stimuli 6. _____ Transports materials to various parts of the body 7. _____ Makes blood cells and stores minerals 8. _____ Regulates body function by the release of hormones 9. _____ Cleans the blood of metabolic waste 10. _____ Produces ova 11. _____ Exchanges oxygen and carbon dioxide
The function of the thymus is to produce lymph fluid.?
Indicate whether the statement is true or false
When the wrist is flexed, the finger flexors cannot produce as tight a fist as when the wrist is in a neutral position. This is an example of what?
A. active insufficiency B. passive insufficiency C. both A and B D. none of the above