KEY - CPS Lecture 4 - Osmolarity and Tonicity Fall 09

KEY - CPS Lecture 4 - Osmolarity and Tonicity Fall 09 - 1....

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1. Intestinal cells absorb glucose, galactose and fructose by carrier-mediated transport. Poisoning the cells’ mitochondria inhibits the absorption of fructose and galactose but glucose is still absorbed. What can you correctly conclude? a. All are absorbed by facilitated diffusion b. All are absorbed by active transport c. Fructose & galactose are actively transported; glucose is moved by facilitated diffusion d. e. None of the above are correct
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2. Sue is a marathon runner who compulsively drinks water. Before and during one long race, she drank close to a gallon of water. Near the end, she began to feel disoriented and weak, and dropped out of the race. Her husband took her to the closest medic station. Her plasma osmolarity was 250 mOsM and her plasma [Na+] was 120 mM (normal = 145 mM). What was Sue’s ICF osmolarity when she was taken to the medic station? a. 145 mOsM b. 278 mOsM c. Somewhere between 145 and 278 mOsM (can not be determined exactly) d. Normal range 285-295 mOsM e. 250 mOsm
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1. While Sue was at the medic station, the medic there suggested that Sue take salt (NaCl) tablets. When she did,
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This note was uploaded on 07/05/2010 for the course BIOL 4312 taught by Professor Roner during the Spring '10 term at UT Arlington.

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KEY - CPS Lecture 4 - Osmolarity and Tonicity Fall 09 - 1....

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