Question 1

Which neurotransmitter is not an amino acid derivative?

Accepted Answer

A) dopamine 
B) acetylcholine 
C) GABA 
D) histamine 
E) serotonin

Question 2

The resting potential of a particular nerve cell is - 66 mV. Depolarization of the membrane will shift the membrane potential toward

Accepted Answer

A) 0 mV. 
B) - 66 mV. 
C) - 90 mV. 
D) There will be no change. 
E) There is not enough information to tell.

Question 3

Catecholamines are synthesized by the

Accepted Answer

A) adrenal gland. 
B) liver. 
C) anterior pituitary gland. 
D) skeletal muscle. 
E) hypothalamus.

Question 4

Name for the phase at the end of an action potential when the membrane potential becomes more negative than it is at rest is the _ phase.

Accepted Answer

A) hyperpolarizing 
B) refractory 
C) repolarizing 
D) threshold 
E) depolarizing

Question 5

The glial cell associated with phagocytosis to fight infection and remove debris are the

Accepted Answer

A) Schwann cells. 
B) oligodendrocytes. 
C) microglia. 
D) astrocytes. 
E) myelin sheath.

Question 6

The kinesin ATPase is located within the of a nerve cell.

Accepted Answer

The answer of The kinesin ATPase is located within the...

Question 7

The technique that allows one to record ion currents passing through individual channels is known as

Accepted Answer

A) ionophores. 
B) ligand- gating. 
C) patch- clamping. 
D) voltage- gating. 
E) ion sensors.

Question 8

The stimulation of a neuron by a signal may ultimately stimulate

Accepted Answer

A) gland cells. 
B) smooth muscle cells. 
C) another nerve cell. 
D) skeletal muscle cells. 
E) all of the above

Question 9

Multiple sclerosis is a result of

Accepted Answer

A) excess amounts of myelin on nerve cells. 
B) an immune system attack on nerve fibers. 
C) the absence of myelin on nerve cells. 
D) blocking the nodes on Ranvier. 
E) having excess acetylcholine receptors.

Question 10

The stimulus for secretion of neurotransmitters into the synaptic cleft is an increase in

Accepted Answer

A) neurotransmitter levels. 
B) chloride levels. 
C) calcium levels. 
D) potassium levels. 
E) sodium levels.

Exam 13: Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons