The main digestive organ that absorbs nutrients is the
A. pharynx.
B. esophagus.
C. mouth.
D. small intestine.
Answer: D
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Surfactant helps to prevent the alveoli from collapsing by ________.
A) humidifying the air before it enters B) warming the air before it enters C) interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid D) protecting the surface of alveoli from dehydration and other environmental variations
What is the function of sebum?
A. Waterproof the ear B. Cool the body C. Moisturize the skin and hair D. Nourish an infant
Spinocerebellar tracts ________
A) are found in the dorsal columns of the spinal cord B) terminate in the spinal cord C) give rise to conscious experience of perception D) carry information about muscle or tendon stretch to the cerebellum
Endochondral ossification ______, whereas intramembranous ossification ______
A) inhibits osteoblast activity; activates osteoclast activity B) activates osteoclasts; inhibits osteoblast activity C) replaces hyaline cartilage; replaces undifferentiated connective tissue D) forms bone in broad, flat areas of the skull; occurs in the limbs