Aged and damaged erythrocytes are broken down by macrophages in the
A) spleen.
B) liver.
C) bone marrow.
D) digestive tract.
E) spleen, liver, and bone marrow.
E
You might also like to view...
The anterior portion of the insula is responsible for
A) sight. B) speech. C) taste. D) smell. E) None of the answers are correct.
Suckling by an infant triggers a positive-feedback mechanism that maintains lactation by stimulating the ________.
A. posterior lobe of the pituitary to secrete oxytocin B. contraction of the milk ducts C. anterior lobe of the pituitary to secrete prolactin D. hypothalamus to secrete prolactin-releasing hormone
During the process of endochondral ossification, chondrocytes in the cartilage model die. Why does this occur?
A. Blood supply to the cartilage is cut off by the developing periosteum. B. Canaliculi connecting adjacent chondrocyte lacunae fuse. C. Phagocytic osteoclasts in the new bone engulf and destroy the chondrocytes. D. The developing bone collar secretes enzymes that destroy the chondrocytes. E. Nutrients cannot diffuse to the chondrocytes through the calcified matrix.
Muscles with fibers that run parallel to the long axis of the body are called
A) parallel. B) convergent. C) circular. D) pennate. E) sphincters.