The first part of the renal tubule is called the _____ and is specialized for _____
A. proximal convoluted tubule; reabsorption of electrolytes and other nutrients.
B. loop of Henle; creation of a concentration gradient in the interstitial fluid
C. distal convoluted tubule; secretion of additional wastes into the urine
D. distal convoluted tubule; reabsorption of water
E. collecting duct; reabsorption of water
Answer: A. proximal convoluted tubule; reabsorption of electrolytes and other nutrients.
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All perennials have secondary tissues
Indicate whether the statement is true or false.
In the eighteenth and nineteenth centuries, people increased Earth's capacity to support more humans through ________ advances
A) demographic B) social-medical C) industrial-agricultural D) psychological E) cultural
Early vascular plants grew only by cell division at the tips of the stems and shoots, a type of growth called
A. secondary growth. B. primary growth. C. vascular growth. D. wood.
Which of the following is TRUE concerning the structure and function of enzymes?
A. All enzymes bind cofactors necessary for their function. B. An apoenzyme is a combination of a cofactor bound to a holoenzyme. C. Enzymes can function at a wide range of pH. D. Competitive inhibition of an enzyme occurs when an inhibitor binds to an allosteric site on the enzyme. E. After an enzyme has catalyzed a reaction, it resumes its original shape and can interact with a new substrate molecule.