_______ secrete the rubbery matrix of cartilage, whereas _________ produce the fibers and ground substance that form the matrix of fibrous connective tissue.
A) Chondroblasts; plasma cells.
B) Mast cells; fibroblasts.
C) Osteocytes; chondroblasts.
D) Chondroblasts; fibroblasts.
E) Adipocytes; plasma cells.
Ans: D) Chondroblasts; fibroblasts.
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The rapid skeletal muscle contractions that produce shaking in response to reduced body temperature is called ______.
a. hypertrophy b. shivering c. atrophy d. fatigue resistance
What separates the thoracic cavity from the abdominopelvic cavity?
A) pleura B) mediastinum C) diaphragm D) pericardium
Degeneration of the neurons in which of the following structures leads to the muscle tremors associated with Parkinson disease?
A. Cerebral crus B. Inferior colliculi C. Substantia nigra D. Pons E. Tegmentum
The organelles that digest engulfed bacteria and cell debris are the:
A. peroxisomes. B. endosomes. C. lysosomes. D. ribosomes. E. mitochondria.