Antibodies and immunoglobulins are protein molecules produced by what type of white blood cells?

Which cardiac cells are responsible for initiating and conducting pacemaker impulses?

A) Motor cells B) Mechanical cells C) Electrical cells D) Atrioventricular cells

Which glands are sometimes removed to prevent a recurrence of prostate or breast cancer?

a. Pituitary b. Epithelial c. Adrenal d. Thyroid