Which of the following will increase the rate of a chemical reaction?
A) An increase in product concentration B) An increase in reactant concentration
C) Enzyme inhibition D) A decreased temperature
B
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The following are the main steps in the generation of an action potential
1. Sodium channels are inactivated. 2. Voltage-gated potassium channels open and potassium moves out of the cell, initiating repolarization. 3. Sodium channels regain their normal properties. 4. A graded depolarization brings an area of an excitable membrane to threshold. 5. A temporary hyperpolarization occurs. 6. Sodium channel activation occurs. 7. Sodium ions enter the cell and depolarization occurs. What is the proper sequence of these events? A) 4, 6, 7, 3, 2, 5, 1 B) 4, 6, 7, 1, 2, 3, 5 C) 6, 7, 4, 1, 2, 3, 5 D) 2, 4, 6, 7, 1, 3, 5 E) 4, 2, 5, 6, 7, 3, 1
The formula for methane gas is CH4. What does the formula 4CH4 represent?
A) a molecule with 4 carbon atoms B) a molecule with 4 carbon atoms and 16 hydrogen atoms C) 4 molecules, each containing a carbon and a hydrogen atom D) 4 molecules, each containing a carbon atom and 4 hydrogen atoms E) an inorganic compound with ionic bonds
The germ layer between the ectoderm and the endoderm is the ________.
Fill in the blank(s) with the appropriate word(s).
The sense of taste is called ________.
A. gustation B. tastant C. olfaction D. perception E. mastication