Describe the two general meanings of the term membrane, as used in biology. Which usage indicates layers of cells and which indicates layers of molecules?
What will be an ideal response?
Prior to the use of microscopes, membranes were simply thin, flexible layers of cells that separated large compartments or lined large cavities. When microscopic study of cells allowed visualization of the cell envelope and organelles, the term membrane was additionally applied to thin layers of molecules.
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The most important phagostimulants of insects are
A) Sugars. B) Amino acids. C) Fatty acids. D) Both A and B
Match the regeneration capacity of the following tissues:
A) Virtually no functional regenerative ability B) Regenerates extremely well C) Moderate regenerative ability D) Weak regenerative ability 1) Smooth muscle. 2) Skeletal muscle. 3) Cardiac muscle. 4) Areolar connective tissue. 5) Tendons and ligaments.
What is the driving force for water intake?
A) metabolism B) the thirst mechanism C) the renin-angiotensin mechanism D) glomerular filtration
Which event occurs during exercise but NOT during fasting?
A. Increased glucose uptake by muscle B. Increased fatty acid oxidation C. Increased glycogenolysis D. Increased breakdown of triglycerides E. Increased cortisol secretion