Epithelial tissues comprise coverings or linings called epithelia and secretory structures called ________.
Fill in the blank(s) with the appropriate word(s).
glands
You might also like to view...
In general, polar molecules diffuse more rapidly through the lipid bilayer part of cell membranes than do nonpolar molecules. This statement is
A. true. B. false, because polar molecules diffuse through less rapidly because the bilayer is polar throughout its width. C. false, because nonpolar molecules diffuse through more rapidly because much of the bilayer is nonpolar. D. false, because polar molecules diffuse through less rapidly because the bilayer is nonpolar throughout its width. E. false, because the rate of diffusion of nonpolar and polar molecules through the bilayer is essentially the same as long as the molecules are the same size.
The heart has been estimated to consume 20-30 times its own weight in ATP each day, and mitochondria comprise about 30% of the volume of a cardiomyocyte. In the normal adult heart, fatty acids supply about 60-80% of the organ’s energy needs, with most of the remainder being supplied by glucose. Mitochondrial fatty acid breakdown to yield ATP is called beta oxidation (Chapter 25). When oxygen supplies are limited, cardiomyocytes increase their use of glucose. Aerobic glucose metabolism consumes less oxygen than beta oxidation, and anaerobic glycolysis does not depend on oxygen.
a. increase glucose consumption. b. decrease glucose consumption. c. increase fatty acid consumption. d. increase protein consumption.
Which of the following is a derivative of riboflavin?
a) NAD b) FAD c) Lactic acid d) Pyruvic acid e) ADP
Which of the following describes the function(s) of the skeletal system?
A) It interacts with muscles, providing movement. B) All of the above describe skeletal system functions. C) It protects organs, especially in the head and thorax. D) It stores inorganic salts.