Question 1

The normal effect of b-endorphin can be blocked by

Accepted Answer

A) curare. 
B) naloxone. 
C) muscarine. 
D) nicotine 
A) curare. 
B) naloxone. 
C) muscarine. 
D) nicotine

Question 2

Cells supporting neuron cell bodies in ganglia are termed

Accepted Answer

A) astrocytes. 
B) ependymal cells. 
C) satellite cells. 
D) Schwann cells. 
A) astrocytes. 
B) ependymal cells. 
C) satellite cells. 
D) Schwann cells.

Question 3

Temporal summation

Accepted Answer

A) occurs when a single neuron releases neurotransmitter rapidly. 
B) occurs because of the convergence of many neurons on a single postsynaptic cell. 
C) only involves excitatory postsynaptic potentials. 
D) only involves inhibitory postsynaptic potentials. 
A) occurs when a single neuron releases neurotransmitter rapidly. 
B) occurs because of the convergence of many neurons on a single postsynaptic cell. 
C) only involves excitatory postsynaptic potentials. 
D) only involves inhibitory postsynaptic potentials.

Question 4

Which of the following is NOT true of nicotinic-gated channels?

Accepted Answer

A) The binding of ACh allows diffusion of both Na+ into and K+ out of the neuron. 
B) Only EPSPs are generated. 
C) Only action potentials are generated. 
D) Summation can occur because of a graded response. 
A) The binding of ACh allows diffusion of both Na+ into and K+ out of the neuron. 
B) Only EPSPs are generated. 
C) Only action potentials are generated. 
D) Summation can occur because of a graded response.

Question 5

Chemical synapses

Accepted Answer

A) have a delayed impulse transmission. 
B) utilize gap junctions. 
C) occur when two nerve cells are in direct contact with each other. 
D) do not require the release of neurotransmitters. 
A) have a delayed impulse transmission. 
B) utilize gap junctions. 
C) occur when two nerve cells are in direct contact with each other. 
D) do not require the release of neurotransmitters.

Question 6

The blood-brain barrier results mostly from the action of __________,a type of glial cell.

Accepted Answer

A) ependymal cells 
B) microglia 
C) astrocytes 
D) oligodendrocytes 
A) ependymal cells 
B) microglia 
C) astrocytes 
D) oligodendrocytes

Question 7

Action potential transmission in the PNS is decreased if which cells are damaged?

Accepted Answer

A) astrocytes 
B) microglia 
C) oligodendrocytes 
D) Schwann cells 
A) astrocytes 
B) microglia 
C) oligodendrocytes 
D) Schwann cells

Question 8

Ligand-gated channels,when activated,allow only Na+ to move into the neuron.

Accepted Answer

A) True 
 B)False

Question 9

Sensory nerves regulate muscle contraction.

Accepted Answer

A) True 
 B)False

Question 10

What portion of the neuron is NOT involved in integration?

Accepted Answer

A) cell body 
B) axon 
C) dendrites 
D) axon hillock 
A) cell body 
B) axon 
C) dendrites 
D) axon hillock

Question 11

If the binding of muscarine to its receptor in the heart causes the beta-gamma complex of the G-protein to bind to a K+ channel,

Accepted Answer

A) the K+ channel will close,leading to depolarization. 
B) the K+ channel will open,leading to depolarization. 
C) the K+ channel will close,leading to hyperpolarization and inhibition. 
D) the K+ channel will open,leading to hyperpolarization and inhibition. 
A) the K+ channel will close,leading to depolarization. 
B) the K+ channel will open,leading to depolarization. 
C) the K+ channel will close,leading to hyperpolarization and inhibition. 
D) the K+ channel will open,leading to hyperpolarization and inhibition.

Question 12

Curare is a competitive ACh antagonist at _____________ ACh receptors.

Accepted Answer

A) muscarinic 
B) NMDA 
C) kainate 
D) nicotinic 
A) muscarinic 
B) NMDA 
C) kainate 
D) nicotinic

Question 13

Which of the following is NOT true of EPSPs?

Accepted Answer

A) they are graded responses 
B) they are capable of summation 
C) they have a refractory period 
D) they are initiated by neurotransmitters 
A) they are graded responses 
B) they are capable of summation 
C) they have a refractory period 
D) they are initiated by neurotransmitters

Question 14

Enhancing the excitability of a synapse so that transmission is favored along certain pathways is called

Accepted Answer

A) long-term potentiation. 
B) synaptic plasticity. 
C) excitotoxicity. 
D) summation. 
A) long-term potentiation. 
B) synaptic plasticity. 
C) excitotoxicity. 
D) summation.

Question 15

Acetylcholine

Accepted Answer

A) is always an excitatory neurotransmitter. 
B) can bind to adrenergic receptors. 
C) is an inhibitory neurotransmitter released by motor neurons. 
D) can bind to nicotinic receptors. 
A) is always an excitatory neurotransmitter. 
B) can bind to adrenergic receptors. 
C) is an inhibitory neurotransmitter released by motor neurons. 
D) can bind to nicotinic receptors.

Question 16

What causes presynaptic inhibition?

Accepted Answer

A) inactivation of Ca2+ channels 
B) a second neuron causes a reduction in neurotransmitter release from another neuron 
C) axoaxonic synapses 
D) All of the choices are correct. 
A) inactivation of Ca2+ channels 
B) a second neuron causes a reduction in neurotransmitter release from another neuron 
C) axoaxonic synapses 
D) All of the choices are correct.

Question 17

Spatial summation

Accepted Answer

A) occurs when a single neuron releases neurotransmitter rapidly. 
B) occurs because of the convergence of many neurons on a single postsynaptic cell. 
C) only involves excitatory postsynaptic potentials. 
D) only involves inhibitory postsynaptic potentials. 
A) occurs when a single neuron releases neurotransmitter rapidly. 
B) occurs because of the convergence of many neurons on a single postsynaptic cell. 
C) only involves excitatory postsynaptic potentials. 
D) only involves inhibitory postsynaptic potentials.

Question 18

What is the predominant affect of stimulation of nicotinic-gated channels?

Accepted Answer

A) stimulation due to outflow of K+ ions. 
B) inhibition due to outflow of K+ ions 
C) stimulation due to influx of Na+ ions 
D) inhibition due to influx of Cl- ions 
A) stimulation due to outflow of K+ ions. 
B) inhibition due to outflow of K+ ions 
C) stimulation due to influx of Na+ ions 
D) inhibition due to influx of Cl- ions

The normal effect of b-endorphin can be blocked by

Cells supporting neuron cell bodies in ganglia are termed

Temporal summation

Which of the following is NOT true of nicotinic-gated channels?

Chemical synapses

The blood-brain barrier results mostly from the action of __________,a type of glial cell.

Action potential transmission in the PNS is decreased if which cells are damaged?

Ligand-gated channels,when activated,allow only Na⁺ to move into the neuron.

Sensory nerves regulate muscle contraction.

What portion of the neuron is NOT involved in integration?

If the binding of muscarine to its receptor in the heart causes the beta-gamma complex of the G-protein to bind to a K+ channel,

Curare is a competitive ACh antagonist at _____________ ACh receptors.

Which of the following is NOT true of EPSPs?

Enhancing the excitability of a synapse so that transmission is favored along certain pathways is called

Acetylcholine

What causes presynaptic inhibition?

Spatial summation

What is the predominant affect of stimulation of nicotinic-gated channels?

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Enzymes and Energy

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Muscle: Mechanisms of Contraction and Neural Control

Blood,Heart and Circulation

Cardiac Output, Blood Flow, and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation of Metabolism

Reproduction

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Exam 7: The Nervous System: Neurons and Synapses

The normal effect of b-endorphin can be blocked by

Cells supporting neuron cell bodies in ganglia are termed

Temporal summation

Which of the following is NOT true of nicotinic-gated channels?

Chemical synapses

The blood-brain barrier results mostly from the action of __________,a type of glial cell.

Action potential transmission in the PNS is decreased if which cells are damaged?

Ligand-gated channels,when activated,allow only Na+ to move into the neuron.

Sensory nerves regulate muscle contraction.

What portion of the neuron is NOT involved in integration?

If the binding of muscarine to its receptor in the heart causes the beta-gamma complex of the G-protein to bind to a K+ channel,

Curare is a competitive ACh antagonist at _____________ ACh receptors.

Which of the following is NOT true of EPSPs?

Enhancing the excitability of a synapse so that transmission is favored along certain pathways is called

Acetylcholine

What causes presynaptic inhibition?

Spatial summation

What is the predominant affect of stimulation of nicotinic-gated channels?

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Enzymes and Energy

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Muscle: Mechanisms of Contraction and Neural Control

Blood,Heart and Circulation

Cardiac Output, Blood Flow, and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation of Metabolism

Reproduction

Filters

Ligand-gated channels,when activated,allow only Na⁺ to move into the neuron.