During the process of endochondral ossification, chondrocytes in the cartilage model die. Why does this occur?
A. Canaliculi connecting adjacent chondrocyte lacunae fuse.
B. Nutrients cannot diffuse to the chondrocytes through the calcified matrix.
C. Blood supply to the cartilage is cut off by the developing periosteum.
D. Phagocytic osteoclasts in the new bone engulf and destroy the chondrocytes.
E. The developing bone collar secretes enzymes that destroy the chondrocytes.
B. Nutrients cannot diffuse to the chondrocytes through the calcified matrix.
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The process by which a gas dissolves in a liquid so that oxygen can be transported to the cells of our body is called:
A. osmosis. B. diffusion. C. electrolysis. D. hydroslysis
These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation
A. External intercostals B. Scalenes C. Transversus thoracis D. Internal intercostals E. Serratus posterior inferior
Which of the following statements describes the epidermis?
A. The epidermis has cutaneous glands, hair follicles, and nerve endings. B. The epidermis is the skin's deepest layer. C. The dermis is composed of loose/areolar connective tissue over dense irregular connective tissue. D. The epidermis is the skin's most superficial layer.
Medication placed into the skin is called ________
A) Intraspinal B) Intracutaneous C) Intravascular D) Intramuscular