T- helper cells act in immune pathways by ________.
A. secreting cytokines
B. processing antigens
C. presenting antigens to other cells
D. All of these choices are correct.
Answer: D
You might also like to view...
Which tooth type is adapted for tearing and piercing?
A) Premolar B) Incisor C) Molar D) Canine
Which best describes functions of the agranular (smooth) endoplasmic reticulum?
A. transcription of DNA into RNA B. generation of ATP C. digestion of engulfed bacteria and cellular debris D. synthesis and packaging of proteins for secretion from the cell or export to other organelles E. synthesis of lipids and intracellular storage of calcium ions
Where are unmyelinated nerve fibers surrounded by Schwann cells?
A) In the PNS B) Nowhere. Unmyelinated nerve fibers are never surrounded by Schwann cells. C) In the CNS D) In the PNS and CNS
The adrenal medulla acts as an endocrine gland as well as being part of which organ system?
a) cardiovascular b) nervous c) digestive d) reproductive