Which one of the following types of T cells is a critical component of the immune system because it stimulates and enhances the activity of other components of the immune system?
A) T suppressor cell
B) T memory cell
C) T helper cell
D) cytotoxic T cell
E) natural killer cells
C
You might also like to view...
Cycads and ginkgos differ from all other seed plants by:
A. having flagellated sperm within the pollen B. lacking cambium C. having the sexes separated on different trees D. being pollinated by wind instead of insects E. All of the ways mentioned in the other choices are correct.
Which of the following is NOT found in an arteriole?
a. elastic layer b. basement membrane c. smooth muscle d. valve e. endothelium
In an unstimulated neuron, the sodium-potassium pump maintains the concentration gradient of sodium and potassium ions by transporting
A) potassium ions out of and sodium ions into the cell. B) sodium and potassium into the cell. C) sodium and potassium out of the cell. D) sodium and potassium ions in both directions across the cell membrane. E) potassium ions into and sodium ions out of the cell.
Compare and contrast Creutzfeld-Jakob disease (CJD) variant CJD, and kuru with regard to: a) causative agent, b) transmission, c) reservoir, d) pathogenesis and symptoms, and e) methods for prevention.
What will be an ideal response?