Biology Forums - Study Force

ANSWERS ARE HIGHLIGHTED

1.A synaptic cleft, or synaptic gap, can be found between a neuron and ______.
    All of these.
    a gland.
    a muscle cell.
    another neuron.

2. The membrane potential that occurs when neurotransmitters bind to their receptors is called _______.
    a postsynaptic potential
    a receptor potential
    an action potential
    an action potential and a receptor

3. The release of neurotransmitter occurs _______.
    all along the axon
    at the axon terminal
    from the motor endplate

4. Which of the following occurs first?
   Voltage-gated calcium channels are opened.
    Synaptic vesicles exit by exocytosis.
    Extracellular calcium enters the axon terminal.
    An action potential arrives at the axon terminal.

5. At a chemical synapse, the intensity of the stimulus is coded by _______.
    the amount of neurotransmitter released
    the amount of calcium that enters the axon terminal
    the size of the action potential
    the size of the action potential and the amount of neurotransmitter released
    the amount of neurotransmitter released and the amount of calcium that enters the axon terminal

6. When the calcium was removed from the extracellular solution, _______.

    the amount of neurotransmitter released increased
    no neurotransmitter was released
    the amount of neurotransmitter released did not change
    the amount of neurotransmitter released decreased

7.When magnesium was added to the extracellular solution, _______.
    the amount of neurotransmitter released increased
    no neurotransmitter was released
    the amount of neurotransmitter released did not change
    the amount of neurotransmitter released decreased

8. Calcium and magnesium are both _______.
    monovalent anions
    divalent cations
    monovalent cations
    divalent anions

Thanks for providing these, much obliged.