Candy bars are well known to supply large amounts of energy for metabolism. With all this energy trapped inside, how can the candy bar sit still on the shelf in the grocery store?
What will be an ideal response?
Candy bars contain large amounts of energy, but it is trapped as potential energy in carbohydrates (both simple and complex). The carbohydrates must be broken down and enter the cell's metabolic pathways in order to convert the potential energy to another form.
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Which of the following properties of action potentials is unique to animals?
A) They are a type of electrical signal. B) They travel at very rapid speeds. C) They may travel via intracellular connections. D) They allow the organism's cells to communicate with each other.
Match each term with the appropriate description.
1. lipophobic molecule that interacts with receptors on cell surface 2. site of vasopressin synthesis 3. true endocrine gland of epithelial origin 4. cannot be stored in secretory vesicles 5. derivatives of tyrosine 6. storage and release site for oxytocin A. peptide hormone B. steroid hormone C. amino acid-derived hormone D. anterior pituitary E. hypothalamus F. posterior pituitary
The release of water, acids, enzymes, and buffers by the digestive epithelium is called
A) digestion. B) secretion. C) excretion. D) absorption. E) ingestion.
Olfaction and hearing are processed in the __________
Fill in the blank(s) with the appropriate word(s).