What will happen if richard’s friend jumps in front of him and scares him?
richard’s central nervous system will take over, and his peripheral nervous system will have a lesser role.
richard’s peripheral nervous system will take over, and his central nervous system will have a lesser role.
richard’s sympathetic nervous system will take over, and his parasympathetic nervous system will have a lesser role.
richard’s parasympathetic nervous system will take over, and his sympathetic nervous system will have a lesser role.

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.

Explain what is meant by a river’s load, and describe how the load is carried.