Refer to Figure 48-3. Reabsorption of solutes with nutritional value occurs at the point labeled:a
1.
b. 3.
c. 5.
d. 6.
e. 9
C
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Two solutions of differing glucose concentration are placed in a container separated by a selectively permeable
membrane that restricts large molecules like glucose, but allows the free diffusion of water. What will be the glucose concentration in the container after dynamic equilibrium has been reached?
a. The water molecules will be evenly distributed in the container, with more glucose molecules on one side than the other. b. The volumes of the solution will be different, with a higher volume on the side that originally contained the higher concentration of glucose. c. The volumes of the solution will be different, with a lower volume on the side that originally contained the higher concentration of glucose. d. The glucose concentration of the two solutions will be identical on both sides of the membrane, but the volumes will remain unchanged. e. The volume and concentrations will be unchanged on both sides of the membrane.
Gee Yee was jogging up the hill next to your house when he suddenly had terrible, suffocating pain in his chest. You called the emergency medical technicians (EMTs), and Gee was rushed to the emergency room, where the medical staff will most likely
perform this test, which involves the use of an x-ray machine. A) C-reactive protein B) electrocardiogram (or EKG, ECG) C) coronary angiography D) Western blot
Which macromolecule did the majority of scientists favor as the "first" to be found in protobionts?
A. DNA. B. RNA. C. Amino acids. D. Proteins.
A sudden or total lack of oxygen can cause unconsciousness in 5–10 seconds. Why?
a. The brain has very high energy requirements and lack of oxygen reduces available energy. b. Oxygen is required for ventilation and lack of ventilation causes fainting. c. Lack of oxygen causes an increase in carbon dioxide, which is toxic. d. The brain needs oxygen to breathe, and when oxygen is not available, it signals the nervous system to cause fainting.