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The secretory coil fills the lumen with a NaCl solution that is isotonic with the blood plasma. As this solution moves upward through the reabsorptive duct, NaCl is reabsorbed into the blood, such that the sweat that is secreted onto the skin surface is hypotonic. Suppose that along its entire length, the walls of the sweat gland consist of a single layer of epithelial cells joined by tight junctions. Which one of the following statements about this system is false?
a.
One would not expect to find aquaporin channels in the membranes of reabsorptive epithelial cells.
b.
One would expect intracellular [Na+] to be lower than extracellular [Na+] in both the secretory and reabsorptive epithelial cells.
c.
CFTR Cl- channels are located in the apical membranes of secretory epithelial cells.
d.
In reabsorptive epithelial cells, one would expect to find Na+/K+ pumps only in the apical membrane.
Evaluate and contrast the philosophies of John Locke and Charles Darwin as they relate to developmental theory. In designing the drug that would bind to the active site and jam it, researchers must use which type of molecule.
Illustrate four organelles or structures that all eukaryotic cells have in common. In adding, describe two eukaryotic cell features that would be found only in autotrophic cells.
Describe the four tissue types, nervous, muscle, epithelial, connective. How did tissues and multicellular animals evolve? How do animals develop.
A rabbit taken from a meadow near sea level and moved to a meadow high on a mountainside would have some trouble breathing. Why give an appropriate reason.
A karyotype reveals that an individual is XYY
explain how an action potential, originating at the axon hillock, is propagated along myelinated and nonmyelinated axons.How are graded potentials made
Compute the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck's constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)
Specify whether the taste of fresh water surprised you or not? Explain if your perception of coarseness change or not?
Genetic variation in the population of organisms is good; but, sometimes mutations can be harmful or cause genetic disorders.
The "Primordial soup" includes the mixture of elements and gases which are thought to have started life on the Earth. Specify where did the gases and elements come from?
Explain the what happen from a physiological standpoint to the respiratory system when smoke is inhaled and exhaled.
Metabolism uses various ways to ensure that 2 opposing pathways do not occur at the equal time. For the following pair of pathways list 2 ways (different cell location, allosteric effector, covalent modification, different intermediate, different ..
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