The first line of cellular defense against pathogens are the
A) T cells.
B) B cells.
C) NK cells.
D) phagocytes.
E) plasma cells.
Question 2
________ are receptors in the aorta that monitor the blood pressure.
A) Chemoreceptors
B) Nociceptors
C) Baroreceptors
D) Proprioceptors
E) Hair cells