Select the correct statement about serial processing.

Select the correct statement about serial processing.  A) Spinal reflexes are an example of serial processing. B) Input travels along several...

Neurons may be classified according to several characteristics. Which of the following is correct?

Neurons may be classified according to several characteristics. Which of the following is correct?  A) Group A fibers are mostly somatic sensory...

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________.

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________.  A) the impulse would...

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is ________.

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is ________.  A)...

A second nerve impulse cannot be generated until ________.

A second nerve impulse cannot be generated until ________.  A) the membrane potential has been reestablished B) the Na ions have been pumped...

________ is an indolamine.

________ is an indolamine.  A) Dopamine B) Epinephrine C) Serotonin D) Tyrosine Answer: C) Seroton...

Which of the following is true about the movement of ions across excitable living membranes?

Which of the following is true about the movement of ions across excitable living membranes?  A) Ions always move actively across membranes through...

All of the following are true of graded potentials except that they ________.

All of the following are true of graded potentials except that they ________.  A) are short-lived B) can form on receptor endings C) increase...

When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________.

When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________.  A) postsynaptic potential B)...

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?  A) Specific...

An inhibitory postsynaptic potential (IPSP) is associated with ________.

An inhibitory postsynaptic potential (IPSP) is associated with ________.  A) a change in sodium ion permeability B) hyperpolarization C) opening...

Nerve cell adhesion molecules (N-CAMs) ________.

Nerve cell adhesion molecules (N-CAMs) ________.  A) release nerve growth factor B) are found on "pathfinder" neurons C) are crucial in the production...

Immediately after an action potential has peaked, which cellular gates open?

Immediately after an action potential has peaked, which cellular gates open?  A) sodium B) chloride C) calcium D) potassium Answer: D)...

Schwann cells are functionally similar to ________.

Schwann cells are functionally similar to ________.  A) ependymal cells B) microglia C) oligodendrocytes D) astrocytes Answer: C) ol...

Neuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________.

Neuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________.  A) astrocytes B)...

Ependymal cells ________.

Ependymal cells ________.  A) are a type of neuron B) are a type of macrophage C) are the most numerous of the neuroglia D) help to circulate...

The sympathetic and parasympathetic are subdivisions of the ________.

The sympathetic and parasympathetic are subdivisions of the ________.  A) central nervous system B) voluntary nervous system C) autonomic nervous...

Which group of fibers spreads impulses at up to 1 meter per second?

Which group of fibers spreads impulses at up to 1 meter per second?  A) group A fibers B) group B fibers C) group C fibers D) group D fibers Answer: C)...

Which of the following is a good example of a neuromodulator?

Which of the following is a good example of a neuromodulator?  A) acetylcholine B) any protein C) any carbohydrate D) nitric oxide Answer: D)...

Select the correct statement about synapses.

Select the correct statement about synapses.  A) Cells with interconnected cytoplasm are chemically coupled. B) The release of neurotransmitter...

An action potential ________.

An action potential ________.  A) is essential for impulse propagation B) involves the influx of negative ions to depolarize the membrane C)...

The sodium-potassium pump ________.

The sodium-potassium pump ________.  A) pumps three sodium ions outside the cell and two potassium ions inside B) pumps two sodium ions outside...

Choose the statement that is most correct about membrane potential.

Choose the statement that is most correct about membrane potential.  A) Voltage would be measured by placing two electrodes on the exterior of...

The part of the neuron that normally receives stimuli is called ________.

The part of the neuron that normally receives stimuli is called ________.  A) an axon B) a dendrite C) a neurolemma D) a Schwann cell Answer: B)...

Which of these ions is actively transported through the cell membrane to establish a resting potential?

Which of these ions is actively transported through the cell membrane to establish a resting potential?  A) Na B) Cl C) Mg D) Ca Answer: A)...

Saltatory conduction is made possible by ________.

Saltatory conduction is made possible by ________.  A) the myelin sheath B) large nerve fibers C) diphasic impulses D) erratic transmission of...

A neuron that has as its primary function the job of connecting other neurons is called a(n) ________.

A neuron that has as its primary function the job of connecting other neurons is called a(n) ________.  A) efferent neuron B) afferent neuron C)...

The substance released at axon terminals to propagate a nervous impulse is called a(n) ________.

The substance released at axon terminals to propagate a nervous impulse is called a(n) ________.  A) ion B) cholinesterase C) neurotransmitter D)...

The term central nervous system refers to the ________.

The term central nervous system refers to the ________.  A) autonomic nervous system B) brain, spinal cord, and peripheral nerves C) brain and...

Collections of nerve cell bodies outside the central nervous system are called ________.

Collections of nerve cell bodies outside the central nervous system are called ________.  A) nuclei B) nerves C) ganglia D) tracts Answer: C)...

Which of the following is not a function of the autonomic nervous system?

Which of the following is not a function of the autonomic nervous system?  A) innervation of smooth muscle of the digestive tract B) innervation...

The role of acetylcholinesterase is to ________.

The role of acetylcholinesterase is to ________.  A) act as a transmitting agent B) amplify or enhance the effect of ACh C) destroy ACh a brief...

The point at which an impulse from one nerve cell is communicated to another nerve cell is the ________.

The point at which an impulse from one nerve cell is communicated to another nerve cell is the ________.  A) cell body B) synapse C) receptor D)...

The chemically gated channel, NMDA, allows ________ ions entry into the nerve cell.

The chemically gated channel, NMDA, allows ________ ions entry into the nerve cell.  A) Na+ B) K+ C) Ca2+ D) Cl- Answer: C) Ca...

The part of a neuron that conducts impulses away from its cell body is called a(n) ________.

The part of a neuron that conducts impulses away from its cell body is called a(n) ________.  A) axon B) dendrite C) neurolemma D) Schwann cell Answer: A)...

Which of the following is not a structural feature of a neuron?

Which of the following is not a structural feature of a neuron?  A) synaptic cleft B) Nissl bodies C) dendrites D) axon Answer: A) synaptic...

A neuronal circuit that concentrates or directs a large number of incoming impulses to a rather small number of neurons is called a(n) ________.

A neuronal circuit that concentrates or directs a large number of incoming impulses to a rather small number of neurons is called a(n) ________.  A)...

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________.

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________.  A) resting period B) repolarization C)...

A neural circuit in which a single impulse is transmitted over and over is a ________.

A neural circuit in which a single impulse is transmitted over and over is a ________.  A) diverging circuit B) converging circuit C) reverberating...

An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is ________.

An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is ________.  A) cholinesterase B) norepinephrine C) acetylcholine D)...

Bipolar neurons are commonly ________.

Bipolar neurons are commonly ________.  A) motor neurons B) called neuroglial cells C) found in ganglia D) found in the retina of the eye Answer: D)...

The sheath of Schwann is also called the ________.

The sheath of Schwann is also called the ________.  A) myelin sheath B) axolemma C) neurilemma D) white matter Answer: C) neurilem...

Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are called ________.

Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are called ________.  A) ependymal cells B) Schwann cells C)...

Which of the following is correct relative to Ohm's law?

Which of the following is correct relative to Ohm's law?  A) I = R / V B) Current is directly proportional to the voltage. C) R = V + I D) The...

Direct-acting neurotransmitters ________.

Direct-acting neurotransmitters ________.  A) require cyclic AMP B) mediate very slow responses C) open ion channels to provoke rapid responses D)...