The hypogastric region is located ________ to the right iliac region.
Fill in the blank(s) with the appropriate word(s).
medial
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The lacrimal glands
A) produce watery, slightly alkaline secretions. B) are located in pockets of the lacrimal bone. C) produce less fluid than the ocular conjunctiva. D) function only during stress. E) All of the answers are correct.
The olfactory epithelium responsible for the sense of smell is located in the ________.
A. floor of the nasal cavity B. cavity of the paranasal sinuses C. lining of the nasopharynx D. wall of the nasal septum E. roof of the nasal cavity
Which of the following would be most easily broken?
A. An ionic bond B. A hydrogen bond C. A nonpolar covalent bond D. A polar covalent bond
With regard to the action of hormones and neurotransmitters on cellular receptors, which of these describes "amplification"?
A. When the extracellular concentration of a chemical messenger reaches a very high level, it overwhelms transporter molecules and the chemical floods into the cell. B. Only hydrophilic first-messenger molecules can activate second-messenger molecules within the cell cytosol. C. A single first-messenger molecule activates multiple second-messenger molecules, each of which activate thousands of enzymes. D. Some cellular receptors have such low affinity for chemical ligands that it can require a million or more molecules to activate them.