where facilitated diffusion occurs
What will be an ideal response?
in either direction depending on the concentration gradient
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Suppose you use a match to ignite a sheet of paper from your notebook, and allow the fire to continue until the burning stops
If you could measure all the energy in the resulting ombustion products, and all the energy in the heat released (including whatever increase in disorder has occurred), would you predict this amount to be more than, less than, or the same amount as the amount of potential energy in the starting sheet of paper? (You should ignore the activation energy provided by the match to light the paper.) A. more energy than the paper B. less energy than the paper C. the same energy as the paper
A eukaryotic gene that is regulated by three activator proteins is said to be under
A. triplet regulation. B. individual control. C. self-regulation. D. combinatorial control. E. elastic control.
Answer the following statements true (T) or false (F)
1. When Schmidt-Nielsen and his colleagues followed a "pulse" of air through the respiratory system of an ostrich, it took two full cycles of inhalation and exhalation for this pulse to pass through and be exhaled. 2. Chemoreceptors for oxygen normally play the most important role in regulating breathing rate. 3. Smaller mammals typically have higher ventilation rates than large mammals. 4. The shape of the oxygen-hemoglobin dissociation curve is a straight line. 5. Asthma attacks result from contraction of the muscles surrounding the bronchioles.
How do mycorrhizae benefit plants?
a. Mycorrhizae increase a plant’s flowering. b. Mycorrhizae increase the surface area of the leaves. c. Mycorrhizae increase a plant’s rate of photosynthetic. d. Mycorrhizae increase a plant’s absorptive surface area of roots. e. Mycorrhizae increase the number of chloroplasts within a plant.