List the four basic processes of the digestive system, and describe each.
What will be an ideal response?
1. Digestion is the chemical and mechanical breakdown of foods into smaller units.
2. Absorption is the active or passive transfer of substances from the lumen of the GI tract to the extracellular fluid.
3. Motility is the movement of material in the GI tract as a result of muscle contraction.
4. Secretion refers to both transepithelial transfer of water and ions from the ECF to digestive tract lumen and the
release of substances synthesized by GI epithelial cells.
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Two hormones that work together to elevate calcium levels in the body are ________ and ________.
A) parathyroid hormone; calcitriol B) vitamin A; vitamin C C) parathyroid hormone; calcitonin D) growth hormone; calcitonin E) vitamin D3; growth hormone
Carbohydrates are stored in the liver and muscles in the form of
A. cellulose. B. starch. C. triacylglycerol. D. glycogen. E. protein.
Most ovulation home test kits measure a surge of which hormone?
A. Progesterone B. Estradiol C. HCG D. LH E. FSH
Protein synthesis requires ________.
A. the presence of transcription factors B. secreted proteins to be synthesized by cytosolic polyribosomes C. recognition of the anticodon in mRNA by the codon in tRNA D. aminoacyl-tRNA synthetase to link amino acids to specific tRNA molecules