Proteins must first be enzymatically degraded to single amino acids before entering the capillaries of the hepatic portal system. Is this true or false? What is the significance of this? Is absorption of carbohydrates and lipids restricted to monomers? Explain.
What will be an ideal response?
False. Absorption of small peptides allows peptides to provoke food allergies. The transporters for peptides are also responsible for absorption of some drugs. Carbohydrates are digested to monosaccharides because there are no transporters for larger carbohydrates. Lipids are absorbed as cholesterol, fatty acids, and monoglycerides, primarily by simple diffusion because they are lipophilic.
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The nuclei of the thalamus that project sensory information to the primary sensory cortex of the cerebrum belong to the ________ group.
Fill in the blank(s) with the appropriate word(s).
Which muscle forms the traditional "six-pack" of a well-toned abdominal wall?
A. Internal oblique B. External oblique C. Longissimus D. Rectus abdominis E. Transversus abdominis
Bones that are thin and have a broad curved shape are classified as ______ bones
A. flat bone B. irregular bone C. long bone D. short bone
The primary role of epithelial tissue in the stomach is
A. mixing and propulsion of foodstuffs. B. housing blood vessels and nerves. C. secretion of substances for chemical digestion. D. regulation of contraction.