Please put all answers in the space provided. 1. What is the value of the quantum in the relevant portion of the figure shown below? _________ 2. What specifically are the purple structures representing in the figure below? __________  

Place the events that occur at the chemical synapse in the proper sequential order by writing the letters only in the space provided below.  Only use the letters once.      A. Depolarization of the plasma membrane of the presynaptic neuron terminal.     B. Opening of chemically-regulated gates on the postsynaptic cell.     C. Fusion of neurotransmitter-containing synaptic vesicles with the plasma membrane.     D. Change in membrane potential of postsynaptic cell.     E. An action potential occurs in a presynaptic cell.     F. Diffusion of neurotransmitter across the synaptic cleft.     G. Entry of calcium through voltage-regulated calcium gates into the presynaptic terminal.     H. Binding of neurotransmitter to specific receptors on the postsynaptic cell.       I. Exocytosis of synaptic vesicle contents.       J. Inactivation of the neurotransmitter.

Describe the basic structure of the plasma (cell) membrane.  Include all of the important components that are found within or associated with the plasma membrane.  Be specific.

Two solutions that have the same total concentration of solutes are said to be ________ to one another.  Please use specific physiological terminology.

Upon reaching the ________ potential, the action potential will occur in an “all” fashion.

Local anesthetics often work by reversibly binding to specific sites within the ___________.  Be specific.

Write letter in space provided. All cells share which of the following properties with neurons?    a. A threshold potential    b. A resting membrane potential    c. An ability to open Na+ gates    d. All of those mentioned are correct.    e. None of those mentioned is correct.

Write letter in space provided. A drug that inhibits the enzyme acetylcholinesterase would likely:    a. Inhibit the release of acetylcholine (ACh) from presynaptic terminals    b. Prevent ACh from being degraded and allow it to further activate other receptors on the postsynaptic membrane    c. Inhibit the attachment of ACh to its receptor    d. Do all of those mentioned.    e. Do none of those mentioned.

1.  In the bottom diagram shown below, the left upward pointing, greenish arrow is representing the start of which phenomenon?  Please put answer in the space provided and spell out phenomenon completely.  ______ 2.  If the top presynaptic neuron fired two times in a row and released its neurotransmitter, what resulting phenomenon would occur in the postsynaptic cell? ______  

Write letter in space provided. Which of the following is characteristic of action potentials?    a. They are not all-or-none in amplitude    b. The K+ gates open before the Na+ gates    c. They can occur after a depolarizing stimulus    d. They are conducted with a decrement in amplitude    e. The Na+ gate is chemically-gated