Where do all cells of the immune system originate?
a. lymph glands
b. the liver
c. Peyer's patches
d. stem cells within the spleen
e. stem cells within bone marrow
Question 2
What amino acids are needed in higher amounts in patients with pressure ulcers?
a. lysine and tyrosine
b. tyrosine and valine
c. arginine and glutamine
d. valine and cysteine
e. lysine and cysteine