Which of the following is associated with actions of aldosterone on principal cells?
A) increased potassium secretion
B) decreased blood pressure
C) increased calcium reabsorption
D) increased sodium secretion
E) decreased plasma osmolarity
Ans: A) increased potassium secretion
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Select the incorrect statement related to fungi.
A. Some fungi are able to grow to many hectares in size. B. Some fungi can break down cellulose into its glucose subunits. In addition, some fungi are predaceous. C. Cheese, wine, and soy sauce are but a few examples of foods dependent on fungi for their production. D. All fungi secrete digestive enzymes and practice external digestion. E. One method of reproduction in fungi is by flagellated sperm. Water is a requirement for those particular fungi to reproduce.
How do cattle digest complex plant polysaccharides like cellulose?
A. They have specialized mammalian enzymes to degrade the bonds of cellulose. B. Bacterial populations in one of the four compartments of their stomachs are able to break the bonds between adjacent glucose units of cellulose. C. Mechanical forces of cud-chewing break the cell walls of plant fibers, enabling the cattle to extract the digestible contents of the cells. D. Acids produced in the stomach degrade cellulose.
The organelles of movement are called:
a. nuclei. b. chloroplasts. c. flagella and cilia. d. mitochondria. e. cytosol.
A neurophysiologist is investigating nerve reflexes in two different animals: a crab and a fish. Action potentials are found to pass more rapidly along the fish's neurons. What is the most likely explanation?
A) The fish's axons are smaller in diameter; small axons transmit action potentials faster than large axons do. B) Unlike the crab, the fish's axons are wrapped in myelin. C) There are more ion channels in the axons of the crab compared with fish axons. D) Unlike the crab, the fish's axons are wrapped in myelin, and the fish's axons are smaller in diameter; small axons transmit action potentials faster than large axons do.