At an Excitatory Chemical Synapse Between Two Neurons

question 65

Multiple Choice

At an excitatory chemical synapse between two neurons,

• A) there is increased permeability of the postsynaptic cell to both Na⁺ and K⁺.
• B) a small hyperpolarization of the postsynaptic membrane occurs when the synapse is activated.
• C) an action potential in the presynaptic neuron always causes an action potential in the postsynaptic neuron.
• D) excitation occurs because K⁺ enters the postsynaptic cell.
• E) action potentials spread through gap junctions between cells.

---

Definitions:

Backward-Bending

Describes a labor supply curve reflecting a situation where higher wages lead to a decrease in labor supplied because individuals opt for leisure over work.

Labor Supply Curve

A graphical representation showing the relationship between the different levels of wages and the quantity of labor workers are willing to supply.

Income Effect

A person’s willingness to give up some income in exchange for more leisure time.

Substitution Effect

If the price of a resource, say labor, goes up, business firms tend to substitute capital or land for some of their now-expensive workers. Also, the substitution of more hours of work for leisure time as the wage rate rises.