Nervous Tissue Quiz

Front 1

___ are examples of effectors of the nervous system

Back 1

Glands

Front 2

Nerves are ___ of the nervous system

Back 2

organs

Front 3

____ are the primary site for receiving signals from other neurons

Back 3

Dendrites

Front 4

While the membrane is depolarizing its _____ are fully open

Back 4

sodium gates are fully open

Front 5

A cholinergic synapse employs ___ as its neurotransmitter

Back 5

acetylcholine

Front 6

Which of these is an example of an EPSP in a typical neuron?
A)a voltage change from 0 mV to +0.35 mV
B)a voltage change from -70 mV to -70.5 mV
C)a voltage change from +35 mV to 0 mV
D)a voltage change from -69.5 mV to -70 mV
E)a voltage change from -70 mV to -69.5 mV

Back 6

E)a voltage change from -70 mV to -69.5 mV

Front 7

___ form myelin in the spinal cord

Back 7

Oligodendrocytes

Front 8

____ division carries signals to the smooth muscle in the large intestine

Back 8

Visceral motor

Front 9

Local potentials are _____, meaning they vary in magnitude according to the strength of the stimulus

Back 9

Graded

Front 10

Presynaptic inhibition is the opposite of

Back 10

Facilitation

Front 11

Local potentials are ___, whereas action potential are ___

Back 11

graded; all or none

Front 12

All of the following are typical characteristics of neurotransmitters except

Back 12

they are released into the bloodstream before reaching the postsynaptic cell

Front 13

The myelin sheath is formed by

Back 13

cells

Front 14

Most of the myelin sheath is composed of _______

Back 14

lipids

Front 15

___ has the greatest influence on the resting membrane potential

Back 15

Potassium

Front 16

During the absolute refractory period

Back 16

no stimulus of any strength will trigger a new action potential

Front 17

A traveling wave of excitation is what we know as

Back 17

a nerve signal

Front 18

___ binds to ligand-regulated gates, and is the most common inhibitory neurotransmitter in the brain

Back 18

γ-aminobutyric acid (GABA)

Front 19

Which of these happens first in an adrenergic synaptic transmission?
A)Adenylate cyclase is activated
B)G protein dissociates from the NE receptor
C)ATP is converted to cyclic AMP
D)G protein binds to adenylate cyclase
E)cyclic AMP induces several effects in the cell

Back 19

G protein dissociates from the NE receptor

Front 20

All of these contribute to the cessation of the signal in a synaptic transmission except:
A)synaptic vesicles secrete neurotransmitter by exocytosis
B)enzymes in the postsynaptic cell break down some neurotransmitters
C)neurotransmitter escapes from the synapse into the nearby extracellular fluid
D)neurotransmitters stop being released
E)the synaptic knob reabsorbs some neurotransmitters by endocytosis

Back 20

synaptic vesicles secrete neurotransmitter by exocytosis

Front 21

The ___ division tends to prepare the body for action

Back 21

sympathetic

Front 22

Some ___ neurons are specialized to detect stimuli, whereas ____ neurons send signals to the effectors of the nervous system

Back 22

afferent; efferent

Front 23

___ neurons are the most common type of neurons

Back 23

Multipolar

Front 24

Accumulation of Ca2+ in the synaptic knob is called ___, and probably plays an important role in ___

Back 24

synaptic facilitation; short-term memory

Front 25

Opening of sodium gates typically leads to

Back 25

depolarization of the plasma membrane.

Front 26

Some antidepressant drugs act by inhibiting monoamine oxidase (MAO), which is an enzyme

Back 26

that breaks down monoamines.

Front 27

Opening of __ gates produces an ___.

Back 27

chloride; IPSP

Front 28

The best type of neural pool for producing a prolonged output is

Back 28

a reverberating circuit.

Front 29

Most local potentials happen at the

Back 29

dendrites

Front 30

___ excites skeletal muscle and inhibits cardiac muscle.

Back 30

Acetylcholine

Front 31

An inhibitory local potential

Back 31

hyperpolarizes the plasma membrane.

Front 32

Which of these happens first in an cholinergic synaptic transmission?
A)postsynaptic potential is produced
B)ACh diffuses across the synaptic cleft
C)sodium enters the postsynaptic cell
D)Ach binds to ligand-regulated gates
E)synaptic vesicles release ACh

Back 32

synaptic vesicles release ACh

Front 33

Inhibitory postsynaptic potentials (IPSPs) are associated with

Back 33

hyperpolarization of the cell membrane.

Front 34

Even though all action potentials are the same, the brain can differentiate a variety of stimuli by source and intensity. The mechanism by which the nervous system converts these action potentials into meaningful information is called neural

Back 34

coding