Nervous System 2

A  FALSE

B  TRUE

A  the extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value

B  the inactivation gates of the voltage-gated sodium ion channels begin to open and the diffusion of sodium ions decreases

C  potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage-gated sodium ion channels begin to close

D  more sodium ions diffuse into the cell than potassium ions diffuse out of it

E  the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level

A  potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage-gated sodium ion channels begin to close

B  the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level

C  more sodium ions diffuse into the cell than potassium ions diffuse out of it

D  the inactivation gates of the voltage-gated sodium ion channels begin to open and the diffusion of sodium ions decreases

E  the extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value

A  the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level

B  the inactivation gates of the voltage-gated sodium ion channels begin to open and the diffusion of sodium ions decreases

C  the extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value

D  potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage-gated sodium ion channels begin to close

E  sodium ions diffusing into the cell through ligand-gated channels is greater than potassium ions diffuse out of it

A  more Na+ diffuses into the cell than K+ diffuses out of it

B  more Na+ diffuses out of the cell than K+ diffuses into it

C  both Na+ and K+ diffuse into the cell

D  more K+ diffuses into the cell than Na+ diffuses out of it

E  more K+ diffuses out of the cell than Na+ diffuses into it

A  FALSE

B  TRUE

A  TRUE

B  FALSE

A  Na+ and K+ gates open at the same time.

B  K+ gates open while Na+ gates remain closed.

C  K+ gates open before Na+ gates.

D  Na+ gates open before K+ gates.

E  Na+ gates open while K+ gates remain closed.

A  The exterior of the cell has a net positive charge and the interior is neutral.

B  The exterior of the cell has a net negative charge and the interior has a net positive charge.

C  The exterior of the cell is neutral and the interior has a net negative charge.

D  The exterior of the cell has a net negative charge and the interior is neutral.

E  The exterior of the cell has a net positive charge and the interior has a net negative charge.

A  Acetylcholine is actively transported to the postsynaptic neuron.

B  Synaptic vessels fuse with the plasma membrane and release acetylcholine.

C  Ligand-gated sodium channels open.

D  Acetylcholine is actively transported from the presynaptic neuron.

E  Sodium ions diffuse into the cell.

A  TRUE

B  FALSE

A  FALSE

B  TRUE

A  Terminal vessels migrate to the plasma membrane.

B  Ligand-gated sodium ion channels open and sodium diffuses inward.

C  Ligand-gated calcium ion channels open and calcium diffuses inward.

D  Voltage-gated calcium ion channels open and calcium diffuses inward.

E  Voltage-gated sodium ion channels open and sodium diffuses inward.

A  ligand-gated sodium channels to open, and sodium ions to diffuse out of the cell

B  voltage-gated sodium ion channels to open, and sodium ions to diffuse into the cell

C  voltage-gated sodium ion channels to open, and sodium ions to diffuse out of the cell

D  acetylcholine to diffuse into the cell

E  voltage-gated calcium ion channels to open, and calcium ions to diffuse into the cell

A  EPSP

B  NMDA

C  LTP

D  IPSP

A  long-term potentiation

B  long-term depression

C  presynaptic inhibition

D  excitotoxicity

A  Endogenous opioids

B  Carbon monoxide

C  Neuropeptide Y

D  ATP

A  Carbon monoxide

B  ATP

C  Nitric oxide

D  Neuropeptide Y

A  Neuropeptide Y

B  Carbon monoxide

C  ATP

D  Nitric oxide

A  Endogenous opioids

B  ATP

C  Endocannabinoids

D  Nitric oxide

A  Carbon monoxide

B  ATP

C  Neuropeptide Y

D  Endogenous opioids

A  ATP

B  Endocannabinoids

C  Carbon monoxide

D  Endogenous opioids

A  It blocks muscarinic receptors.

B  It catalyzes reformation of ACh.

C  It catalyzes hydrolysis of ACh to remove it from the synaptic cleft.

D  It binds to sodium channels on the postsynaptic cell.

A  Skeletal muscle

B  Skeletal muscle, Autonomic ganglia, and Specific regions of the brain

C  Autonomic ganglia

D  Specific regions of the brain

A  Microvilli

B  Tight junctions

C  Desmosomes

D  Gap junctions

A  Produce carrier proteins and ion channels

B  Induce tight junctions between capillary endothelial cells,produce enzymes to destroy toxic substances and produce carrier proteins and ion channels

C  Produce enzymes to destroy toxic substances

D  Induce tight junctions between capillary endothelial cells

A  Microglia

B  Schwann cells

C  Oligodendrocytes

D  Ependymal cells

E  Astrocytes

A  inhibitory proteins in the PNS will prevent axons in his hand from ever regenerating

B  he is an adult, and CNS neurons can only regenerate in childhood

C  astrocytes that surround the CNS axons do not have enough myelin for regeneration

D  neurons in the CNS lack Schwann cells, which play a major role in axon regeneration

A  Nodes of Ranvier

B  Both neurilemma and sheath of Schwann are correct.

C  Myelin

D  Sheath of Schwann

E  Neurilemma