SpringExam1 - Name _ KEY - Bio 416K Human Physiology and...

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Name _____________________________ KEY - Bio 416K Human Physiology and Functional Anatomy I Exam 1 Spring 07 1.An intravenous (IV) solution that is 5% glucose in 0.45% NaCl is ____________________ and ___________________ compared to normal human body osmolarity. (mw glucose 180, n=1; mw NaCl 58.5, n=1.8) a.Isosmotic and isotonic b.Isosmotic and hypertonic c.Hyposmotic and hypotonic d.Hyperosmotic and isotonic e.Hyperosmotic and hypotonic 2. Intestinal cells absorb glucose, galactose and fructose by carrier-mediated transport. Poisoning the cells’ mitochondria inhibits the absorption of glucose but fructose and galactose are 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. Glucose is actively transported; fructose & galactose are moved by facilitated diffusion e. None of the above are correct 3. Which of the following statements best describes diffusion of a solute across a human cell membrane? a. Diffusion depends to the conversion of ATP to ADP b. Diffusion is rapid over long distances but much slower over short distances c. Cell membranes composed of proteins impede diffusion the greatest amount d. Diffusion depends on the number of stacked phospholipid layers e. Diffusion rate depends on the concentration gradient for an uncharged solute. 4. Nurse Cameron needs to mix an intravenous solution to treat an emergency room patient who has lost a lot of blood. She needs to stabilize this patient until blood can arrive from the blood bank. The available solutes include glucose, NaCl and urea. What IV solution should nurse Cameron prepare? a.Isosmotic solution containing glucose and urea b.Isosmotic solution containing only NaCl c.Hyposmotic solution containing only NaCl d.Hyposmotic solution containing only glucose e.None of the above 5. Facilitated diffusion and active transport differ in that ______________________. a. Facilitated diffusion uses cell membrane proteins to move substances whereas active transport does not b. Facilitated diffusion uses a substrate to bind to a protein carrier, whereas active transport 1
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does not c. Net facilitated diffusion stops when concentrations of transported substance are equal inside the cell and out, whereas active transport does not d. Active transport demonstrates properties of specificity, competition and saturation, whereas facilitated transport does not e. Facilitated diffusion moves water across the cell membrane, whereas active transport does not 6. The rate of oxygen diffusion across lung alveolar membranes is _________________ with a smaller surface area due to emphysema, ____________________ with a thicker respiratory membrane due to lung fibrosis; and ___________________ with a
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This note was uploaded on 08/10/2011 for the course BIO 2401 taught by Professor Karen during the Fall '11 term at CSU San Marcos.

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SpringExam1 - Name _ KEY - Bio 416K Human Physiology and...

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