Anatomy of the Nervous System Quiz

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Questions and Answers

What is the function of the spinal cord?

The spinal cord is responsible for transmitting nerve signals to and from the brain.

Where is the spinal cord located?

The spinal cord lies in the vertebral canal, which is protected by the bony structures of the vertebral column.

What is the main function of the autonomic nervous system?

  • Regulating the external environment
  • Processing sensory information
  • Controlling voluntary muscle movements
  • Regulating the internal environment (correct)

Which of these are divisions of the autonomic nervous system?

<p>Sympathetic and parasympathetic (A)</p> Signup and view all the answers

What does a dermatome refer to?

<p>A dermatome is the area of skin supplied by the afferent (sensory) fibers of a single spinal nerve.</p> Signup and view all the answers

Which of the following is NOT a plexus formed by spinal nerves?

<p>Thoracic plexus (C)</p> Signup and view all the answers

What is the root value of a peripheral nerve?

<p>The root value of a peripheral nerve indicates which spinal nerve roots have contributed to that nerve.</p> Signup and view all the answers

What are the 3 layers that surround a peripheral nerve?

<p>The three layers surrounding a peripheral nerve are the epineurium, perineurium, and endoneurium.</p> Signup and view all the answers

The sympathetic division of the autonomic nervous system prepares the body for emergencies.

<p>True (A)</p> Signup and view all the answers

The parasympathetic division of the autonomic nervous system is responsible for regulating the body during emergencies.

<p>False (B)</p> Signup and view all the answers

Somatic motor neurons control involuntary muscle movements.

<p>False (B)</p> Signup and view all the answers

Autonomic motor neurons control voluntary muscle movements.

<p>False (B)</p> Signup and view all the answers

The central nervous system is made up of the brain and spinal cord.

<p>True (A)</p> Signup and view all the answers

The peripheral nervous system is made up of the brain and spinal cord.

<p>False (B)</p> Signup and view all the answers

The spinal nerves are part of the central nervous system.

<p>False (B)</p> Signup and view all the answers

The dorsal root ganglion contains the cell bodies of sensory neurons.

<p>True (A)</p> Signup and view all the answers

The ventral root carries sensory fibers.

<p>False (B)</p> Signup and view all the answers

The dorsal root carries motor fibers.

<p>False (B)</p> Signup and view all the answers

The phrenic nerve is involved in the control of breathing.

<p>True (A)</p> Signup and view all the answers

The sciatic nerve is the largest nerve in the human body.

<p>True (A)</p> Signup and view all the answers

The femoral nerve innervates the front of the thigh.

<p>True (A)</p> Signup and view all the answers

The radial nerve innervates the muscles of the forearm, including the biceps brachii.

<p>False (B)</p> Signup and view all the answers

The median nerve innervates the thumb and index finger.

<p>True (A)</p> Signup and view all the answers

Flashcards

Somatic Nervous System

The portion of the nervous system that controls voluntary movement and receives sensory information from the external environment.

Autonomic Nervous System

The portion of the nervous system that controls involuntary functions like heart rate, digestion, and breathing.

Afferent Nerves

Nerves that carry signals from the sensory organs to the central nervous system.

Efferent Nerves

Nerves that carry signals from the central nervous system to muscles and glands.

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Spinal Nerve

A bundle of nerve fibers that transmits signals to and from the brain.

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Dermatome

The area of skin innervated by a single spinal nerve.

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Myotome

A group of muscles innervated by a single spinal nerve root.

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Ganglion

A cluster of nerve cell bodies in the peripheral nervous system.

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Dorsal Root

The region of the spinal cord responsible for relaying sensory information to the brain.

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Ventral Root

The region of the spinal cord responsible for transmitting motor signals to the muscles.

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Epineurium

The outer layer of connective tissue surrounding a peripheral nerve.

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Perineurium

The layer of connective tissue surrounding a fascicle within a peripheral nerve.

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Endoneurium

The layer of connective tissue surrounding individual nerve fibers within a fascicle.

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Fascicle

A bundle of nerve fibers within a peripheral nerve.

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Nerve Plexus

A network of interconnected nerves that transmit signals to and from the brain.

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Mixed Spinal Nerve

A spinal nerve that carries both sensory and motor fibers.

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Ramus

One of two branches of a spinal nerve, responsible for innervating specific regions of the body.

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Sympathetic Nervous System

The division of the autonomic nervous system responsible for preparing the body for emergencies.

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Parasympathetic Nervous System

The division of the autonomic nervous system responsible for regulating the body during non-emergency situations.

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Root Value

The number of spinal nerve roots that contribute to a particular peripheral nerve.

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Brain

The central processing unit of the nervous system, responsible for integrating and coordinating all brain function.

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Spinal Cord

The central pathway of the nervous system, connecting the brain to the rest of the body.

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Grey Matter

The dark, central region of the spinal cord, containing nerve cell bodies.

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White Matter

The white, outer region of the spinal cord, containing myelinated nerve fibers.

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Cervical Plexus

A group of nerves that innervate the neck and shoulder region.

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Brachial Plexus

A group of nerves that innervate the arm and hand region.

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Lumbar Plexus

A group of nerves that innervate the thigh region.

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Sacral Plexus

A group of nerves that innervate the leg and foot region.

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Phrenic Nerve

A specific peripheral nerve that controls the diaphragm muscle.

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Intercostal Nerves

A group of nerves that innervate the skin of the back, chest, and abdomen.

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Related Documents

PHTY 140 Peripheral Nerves PDF

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