The center portion of a long bone is called the .

TH2 cells promote antibody-mediated immunity, especially __________ production, by B cells and rev up __________ activity for defense against parasitic worms

Fill in the blank(s) with correct word

Which cartilage forms the meniscus?

A) Hyaline B) Elastic C) Fibrocartilage D) Areolar cartilage

Which tunic of an artery contains epithelium?

A) tunica externa B) tunica media C) tunica intima D) None of the listed responses is correct.

Which of the following is true for parathyroid hormone?

A) stimulates osteoblast activity. B) decreases the rate of calcium absorption. C) increase the rate of calcium excretion. D) lowers the level of calcium ion in the blood. E) inhibits calcitonin secretion.