How can phospholipids form a film when mixed in water?
What will be an ideal response?
Phospholipids have both polar and nonpolar ends. The polar end interacts with water, leaving the nonpolar end oriented in the opposite direction.
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The connection of the anterior portion of the tongue to the underlying epithelium is the
A) uvula. B) faux. C) lingual frenulum. D) labial frenulum. E) glossal septum.
Preganglionic fibers of the autonomic efferent pathway are ________ and secrete ________.
A. myelinated; acetylcholine (ACh) and norepinephrine(NE) B. myelinated; norepinephrine (NE) C. myelinated; acetylcholine (ACh) D. unmyelinated; norepinephrine(NE) E. unmyelinated; acetylcholine (ACh)
In ________, ions or molecules move in opposite directions.
A. ionport B. symport C. uniport D. antiport E. comport
This structure prevents food from entering the airway.
a. Vestibular fold B. Uvula C. Laryngopharynx D. Epiglottis