CH 4 Synaptic Transmission

Question 1

Voltage-Gated Calcium Channels

Answer 1

Open in response to voltage changes within the presynaptic terminal. Ca2+ is highly concentrated on the outside of the presynaptic terminal.

Question 2

Postsynaptic Changes in the Membrane

Answer 2

Chemical messengers produce changes in the membrane potential of the postsynaptic neuron.

Question 3

Postsynaptic receptor families

Answer 3

Have a specific binding site where neurotransmitters attach themselves.

Question 4

The binding of the neurotransmitter to the receptor is like

Answer 4

inserting a key into a rock.Re

Question 5

Receptors can be classified into two general families. What are they?

Answer 5

Inotropic ( transmitter-gated ion channels.) Metabotropic ( G-protein coupled receptors.)

Question 6

Ionotropic ( Transmitter-gated ion channels

Answer 6

Allow the passage of ions between the inside and outside of a cell. They have four or five subunits that have a pore in the middle.

Question 6

There are multiple subtypes of transmitter-gated ion channels. What are they called?

Answer 6

They are called excitatory or inhibitory.

Question 6

Ionotropic graded potentials

Answer 6

Allows sodium to pass through.

Question 6

Ionotropic receptors have an excitatory effect on the postsynaptic neuron because it will result in what?

Answer 6

It will result in depolarization.

Question 7

Graded Potentials. Inhibitory Postsynaptic Potentials

Answer 7

These allow potassium or Chloride to pass through. These receptors have an inhibitory effect because they result in hyperpolarization.

Question 7

Receptors that have an inhibitory effect on the postsynaptic neuron result in what?

Answer 7

Hyperpolarization of the cell.

Question 8

Receptors that have an excitatory effect on the postsynaptic neuron results in what?

Answer 8

Depolarization of the cell.

Question 9

Graded potentials: Excitatory postsynaptic potentials allow what to pass through?

Answer 9

Sodium

Question 10

Graded potentials: Inhibitory Postsynaptic potentials allows what to pass through?

Answer 10

Allows potassium or chloride to pass through