Question 1

The motor division of the nervous system carries nerve impulses from
A)the CNS to the effectors.
B)the CNS to the sensory receptors.
C)the effectors to the CNS.
D)the sensory receptors.to the CNS.

Accepted Answer

The motor division of the nervous system is responsible for carrying nerve impulses from the central nervous system (CNS) to the effectors, such as muscles or glands, causing them to respond. Therefore, choice A is the correct answer. Choice B is incorrect as the sensory division of the nervous system carries impulses from sensory receptors to the CNS. Choice C is also incorrect as it suggests that effectors send nerve impulses to the CNS, which is not the case. Choice D is also incorrect for the same reason as choice B.

Question 2

Bipolar neurons are
A)always interneurons.
B)sensory neurons other than the ones for the senses of hearing, equilibrium, vision, and smell.
C)always motor neurons.
D)sensory neurons for the senses of hearing, equilibrium, vision, and smell.
E)either motor neurons or interneurons.

Accepted Answer

Bipolar neurons are specialized sensory neurons for the senses of hearing, equilibrium, vision, and smell. They have a single axon and a single dendrite extending from two sides of the cell body, making them distinctively suited for transmitting sensory information from these specific senses.

Question 3

____________ are involved in the production of cerebrospinal fluid.
A)Microglial cells
B)Ependymal cells
C)Oligodendrocytes
D)Astrocytes
E)Schwann cells

Accepted Answer

Ependymal cells are involved in the production and regulation of cerebrospinal fluid, which is important for the protection and nourishment of the brain and spinal cord. Microglial cells are involved in immune defense in the central nervous system, oligodendrocytes provide myelination for axons in the central nervous system, astrocytes provide support and maintenance for neurons, and Schwann cells provide myelination for axons in the peripheral nervous system.

Question 4

The peripheral nervous system (PNS) consists of
A)cranial nerves, spinal nerves, and ganglia.
B)cranial nerves, spinal nerves, ganglia, and sensory receptors.
C)cranial nerves and spinal nerves.
D)cranial nerves, spinal nerves, ganglia, and neuroglia.

Accepted Answer

The PNS consists of cranial nerves, spinal nerves, ganglia, and sensory receptors. Choice A is incorrect as it omits sensory receptors which play a crucial role in carrying signals from the environment to the central nervous system. Choice C is incorrect as it omits ganglia which are clusters of nerve cell bodies outside the central nervous system. Choice D is incorrect as it includes neuroglia which are actually a part of the central nervous system.

Question 5

The central nervous system consists of
A)brain and spinal cord.
B)brain, spinal cord, and ganglia.
C)cranial nerves, spinal nerves, ganglia, and neuroglia.
D)brain and cranial nerves.

Accepted Answer

The central nervous system includes the brain and the spinal cord. While ganglia are sometimes considered part of the central nervous system, they are more commonly associated with the peripheral nervous system. Similarly, while cranial nerves do originate from the brain, they extend outward to interact with various parts of the body, making them part of the peripheral nervous system as well.

Question 6

____________ form the myelin sheath around axons in PNS.
A)Oligodendrocytes
B)Microglial cells
C)Ependymal cells
D)Astrocytes
E)Schwann cells

Accepted Answer

Schwann cells are responsible for forming the myelin sheath around axons in the peripheral nervous system. Oligodendrocytes form the myelin sheath in the central nervous system, while microglial cells are immune cells that remove damaged or dead cells. Ependymal cells line the ventricles of the brain and help produce cerebrospinal fluid. Astrocytes have many functions, including maintaining the blood-brain barrier and regulating neurotransmitter levels.

Question 7

The somatic nervous system is involved in controlling
A)skeletal muscle, cardiac muscle, and smooth muscle.
B)cardiac muscle, glands, and adipose tissue.
C)skeletal muscle, skin, joints, and bones.
D)skeletal muscle only.

Accepted Answer

The answer of The somatic nervous system is involved in...

Question 8

Which statement is true?
A)All axons, dendrites, and cell bodies are myelinated.
B)Some axons, dendrites, and cell bodies are myelinated.
C)Some axons are myelinated; all dendrites and cell bodies are unmylinated
D)All axons and dendrites are myelinated; cell bodies are unmyelinated.

Accepted Answer

Myelination occurs in some axons to increase the speed of electrical transmission. However, dendrites and cell bodies are not myelinated. This structural feature is crucial for the proper functioning of the nervous system.

Question 9

The sensory division of the nervous system carries nerve impulses from
A)the CNS to the sensory receptors.
B)the effectors to the CNS.
C)the CNS to the effectors.
D)the sensory receptors.to the CNS.

Accepted Answer

The sensory division of the nervous system is responsible for carrying nerve impulses from the sensory receptors to the CNS. This allows for the brain to receive information about the external and internal environment of the body, which is necessary for coordinating appropriate responses to changes in those environments. Therefore, the correct answer is D, as it correctly identifies that the sensory division carries nerve impulses from the sensory receptors to the CNS.

Question 10

____________ join with the epithelium of blood vessels to form blood-brain barrier in the brain.
A)Schwann cells
B)Microglial cells
C)Ependymal cells
D)Oligodendrocytes
E)Astrocytes

Accepted Answer

Astrocytes join with the epithelium of blood vessels to form the blood-brain barrier in the brain.

Question 11

Unipolar neurons are
A)either motor neurons or interneurons.
B)sensory neurons other than the ones for the senses of hearing, equilibrium, vision, and smell.
C)always interneurons.
D)always motor neurons.
E)sensory neurons for the senses of hearing, equilibrium, vision, and smell.

Accepted Answer

Unipolar neurons are a type of sensory neuron that have a single process that extends from the cell body and branches into two directions, one towards the peripheral ending and other towards the central nervous system. They transmit sensory information from sensory receptors in the skin, muscles, and organs to the spinal cord and brain. However, the unipolar neurons for the senses of hearing, equilibrium, vision, and smell are bipolar neurons.

Question 12

The autonomic nervous system is involved in controlling
A)cardiac muscle, glands, and adipose tissue.
B)skeletal muscle only.
C)skeletal muscle, skin, joints, and bones.
D)skeletal muscle, cardiac muscle, and smooth muscle.

Accepted Answer

The autonomic nervous system is responsible for controlling involuntary functions such as cardiac muscle, glands, and adipose tissue. It does not control voluntary functions like skeletal muscle, skin, joints, and bones. The autonomic nervous system also controls smooth muscle, in addition to cardiac muscle and glandular tissue.

Question 13

Multipolar neurons are
A)always interneurons.
B)always motor neurons.
C)either motor neurons or interneurons.
D)sensory neurons for the senses of hearing, equilibrium, vision, and smell.
E)sensory neurons other than the ones for the senses of hearing, equilibrium, vision, and smell.

Accepted Answer

Multipolar neurons can be either motor neurons or interneurons. They have multiple dendrites and a single axon, and are found in both the central and peripheral nervous systems. They are not specific to any particular sensory modality.

Question 14

If a neuron's cell body and dendrites are located in the CNS while its axon is located in PNS, this neuron is a(n)
A)sensory neuron.
B)interneuron.
C)sensory or motor neuron.
D)motor neuron.

Accepted Answer

The answer of If a neuron's cell body and dendrites...

Question 15

The _________ increases the speed of nerve impulse transmission.
A)myelin sheath
B)terminal bouton
C)cell body
D)axon

Accepted Answer

The myelin sheath increases the speed of nerve impulse transmission by insulating and preventing the dispersion of electric current along the axon.

Question 16

The dendrites of a neuron
A)carry impulses away from the cell body.
B)carry impulses toward the cell body.
C)nourish and protect the neuron.
D)carry impulses toward the sensory receptors.

Accepted Answer

Dendrites are branching extensions of a neuron that receive information and impulses from other neurons or sensory receptors and transmit them toward the cell body.

Question 17

The somatic sensory information is collected by sensory receptors in the
A)skeletal muscle, skin, joints, and bones.
B)skeletal muscle only.
C)skeletal muscle, cardiac muscle, and smooth muscle.
D)cardiac muscle, glands, and adipose tissue.

Accepted Answer

Somatic sensory information is collected by sensory receptors in skeletal muscles, skin, joints, and bones. These receptors detect stimuli such as pressure, temperature, and pain, and send signals to the nervous system for processing and interpretation.

Question 18

If a neuron is located entirely in the CNS, this neuron is a(n)
A)sensory or motor neuron.
B)interneuron.
C)motor neuron.
D)sensory neuron.

Accepted Answer

Interneurons are located entirely within the CNS and connect sensory and motor neurons. Therefore, if a neuron is located entirely in the CNS, it is most likely an interneuron.

Question 19

The axon
A)carries impulses toward the sensory receptors.
B)carries impulses toward the cell body.
C)carries impulses away from the cell body.
D)nourishes and protects the neuron.

Accepted Answer

The axon is a long, thin extension of a neuron that carries impulses away from the cell body and toward other neurons, muscles or glands. It is responsible for transmitting electrical signals (nerve impulses) between the cell body and other parts of the body.

Question 20

____________ is the portion of a neuron that contains the nucleus and the other usual cytoplasmic organelles.
A)Terminal bouton
B)Axon
C)Myelin sheath
D)Cell body

Accepted Answer

The cell body, or soma, is the portion of the neuron that contains the nucleus and other usual cytoplasmic organelles, such as mitochondria and ribosomes, necessary for cellular processes. A) Terminal bouton is the end of the axon where neurotransmitters are released. B) Axon is the long, slender projection of a neuron that transmits nerve impulses. C) Myelin sheath is a fatty substance that covers and insulates the axon in some neurons.

Quiz 8: Nervous System

The motor division of the nervous system carries nerve impulses from

Bipolar neurons are

____________ are involved in the production of cerebrospinal fluid.

The peripheral nervous system (PNS) consists of

The central nervous system consists of

____________ form the myelin sheath around axons in PNS.

The somatic nervous system is involved in controlling

Which statement is true?

The sensory division of the nervous system carries nerve impulses from

____________ join with the epithelium of blood vessels to form blood-brain barrier in the brain.

Unipolar neurons are

The autonomic nervous system is involved in controlling

Multipolar neurons are

If a neuron's cell body and dendrites are located in the CNS while its axon is located in PNS, this neuron is a(n)

The _________ increases the speed of nerve impulse transmission.

The dendrites of a neuron

The somatic sensory information is collected by sensory receptors in the

If a neuron is located entirely in the CNS, this neuron is a(n)

The axon

____________ is the portion of a neuron that contains the nucleus and the other usual cytoplasmic organelles.