Cells regulate the osmotic pressure between their internal and external environments by
A) "drinking" in fluid via pinocytosis or expelling fluid via exocytosis.
B) transmitting signals to the hypothalamic thirst mechanism prompting us to drink.
C) using transport proteins to pump electrolytes across the cell membrane.
D) allowing passive diffusion of sodium and potassium across the cell membrane.
C
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Answer the following questions true (T) or false (F)
1. Prebiotics such as yogurt, kefir, tempeh, kimchi, and sauerkraut should be eaten mindfully. 2. The lymphatic system of interconnected vessels that contains lymph fluid in which fat-soluble nutrients are carried; also includes bone marrow, lymph nodes, and other tissues and organs that produce and store defensive cells. 3. Carbohydrates, proteins, and the fat-soluble vitamins are transported in the bloodstream through the hepatic portal vein to the liver.
What condition may result if the lower esophageal sphincter is not closed tight enough after eating?
a. heartburn b. high blood pressure c. burping d. hiccups e. diarrhea
Lactose intolerance is caused by:
A) extremely quick digestion of lactose by the body. B) the inability of the body to utilize the galactose obtained from lactose. C) the inability of the body to produce enough lactase. D) excessive production of lactase by the body.
Actions of hydrochloric acid produced by the stomach include ________.
A. dissolving dietary minerals for improved absorption B. destroying bacteria and viruses found in foods C. promoting digestion of protein D. All of the responses are correct.