What is the role of vitamin C in bone growth?
A. It is necessary for the absorption of calcium by the digestive system.
B. It stimulates osteoblast activity.
C. It promotes the cross-linking of collagen molecules in bone.
D. It promotes synthesis of the glycosaminoglycans (GAGs) of the bone matrix.
E. It promotes proliferation of cartilage at the epiphyseal plates.
C. It promotes the cross-linking of collagen molecules in bone.
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Mucosa-associated lymphoid tissues include all of the following EXCEPT ________
A) palatine tonsils B) islets of Langerhans C) lingual tonsils D) Peyer's patches
The afferent and efferent nerves:
A) are regulated by the sympathetic nervous system. B) are receptors stimulated by the sympathetic nervous system. C) are responsible for the somatic functions of the spinal cord. D) originate from the hypothalamus and regulate temperature.
Which germ layer is the thyroid derived from?
A. ectoderm B. mesoderm C. endoderm
Sucrase can substitute for lactase for those who do not have lactase to digest the sugar lactose.
Answer the following statement true (T) or false (F)