Podcast
Questions and Answers
Which part of a neuron is primarily responsible for receiving information?
Which part of a neuron is primarily responsible for receiving information?
What is the structural composition of the central nervous system (CNS)?
What is the structural composition of the central nervous system (CNS)?
Which type of nerve is entirely sensory?
Which type of nerve is entirely sensory?
What distinguishes the peripheral nervous system (PNS) from the central nervous system?
What distinguishes the peripheral nervous system (PNS) from the central nervous system?
Signup and view all the answers
Which cranial nerve is responsible for motor control of the sternocleidomastoid and trapezius muscles?
Which cranial nerve is responsible for motor control of the sternocleidomastoid and trapezius muscles?
Signup and view all the answers
Which division of the nervous system is responsible for voluntary movements?
Which division of the nervous system is responsible for voluntary movements?
Signup and view all the answers
Which of the following statements about mature neurons is correct?
Which of the following statements about mature neurons is correct?
Signup and view all the answers
What structural feature differentiates the axon from dendrites?
What structural feature differentiates the axon from dendrites?
Signup and view all the answers
Which cranial nerve does not primarily serve the head and neck?
Which cranial nerve does not primarily serve the head and neck?
Signup and view all the answers
What are the primary functions of neurons?
What are the primary functions of neurons?
Signup and view all the answers
Which characteristic is NOT typically associated with neurons?
Which characteristic is NOT typically associated with neurons?
Signup and view all the answers
What term describes the long tubular neurite that conducts impulses away from the cell body?
What term describes the long tubular neurite that conducts impulses away from the cell body?
Signup and view all the answers
Which division of the nervous system includes the spinal and cranial nerves?
Which division of the nervous system includes the spinal and cranial nerves?
Signup and view all the answers
Which cranial nerves function exclusively in sensory capacities?
Which cranial nerves function exclusively in sensory capacities?
Signup and view all the answers
Which of the following is NOT a component of the Peripheral Nervous System?
Which of the following is NOT a component of the Peripheral Nervous System?
Signup and view all the answers
Which statement is NOT true regarding the organization of cranial nerves?
Which statement is NOT true regarding the organization of cranial nerves?
Signup and view all the answers
Which part of the nervous system is responsible for involuntary control?
Which part of the nervous system is responsible for involuntary control?
Signup and view all the answers
How many pairs of cranial nerves are classified as entirely motor?
How many pairs of cranial nerves are classified as entirely motor?
Signup and view all the answers
Which structure facilitates communication between the brain and the body's organs?
Which structure facilitates communication between the brain and the body's organs?
Signup and view all the answers
Neurons are primarily found in which three locations?
Neurons are primarily found in which three locations?
Signup and view all the answers
Study Notes
Nervous System Overview
- A neuron is a nerve cell and all its processes
- Neurons are excitable cells specialized for receiving stimuli and conducting nerve impulses
- Neurons vary in size and shape, but each has a cell body with branching neurites
- The neurites responsible for receiving information and conducting it towards the cell body are called dendrites
- The single long tubular neurite that transmits impulses away from the cell body is called the axon
- Dendrites and axons are often referred to as nerve fibers
- Neurons are found in the brain, spinal cord, and ganglia
- Unlike most other body cells, mature neurons do not divide or replicate
- The nervous system can be separated into parts based on structure and function
- Structurally, it's divided into the central nervous system (CNS) and the peripheral nervous system (PNS)
- The CNS is composed of the brain and spinal cord
- The PNS is composed of all nervous structures outside the CNS that connect it to the body
- The PNS consists of spinal and cranial nerves, visceral nerves and plexuses, and the enteric system
- Cranial nerves—12 pairs
- Spinal nerves—31 pairs
- The 12 cranial nerves exit the brain through foramina and fissures in the skull
- All nerves are distributed in the head and neck, except cranial nerve X, which also supplies structures in the thorax and abdomen
- Cranial nerves are named as follows: olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, and hypoglossal
- Olfactory, optic, and vestibulocochlear nerves are entirely sensory
- Oculomotor, trochlear, abducens, accessory, and hypoglossal nerves are entirely motor
- Trigeminal, facial, glossopharyngeal, and vagus nerves are both sensory and motor
- Spinal nerves exit the vertebral column through intervertebral foramina
- 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal
- Each spinal nerve is connected to the spinal cord by two roots: the anterior root and the posterior root
- The anterior root consists of efferent (motor) fibers, carrying nerve impulses away from the CNS
- The posterior root consists of afferent (sensory) fibers, carrying nerve impulses to the CNS
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the structure and function of the nervous system, including the role of neurons, dendrites, and axons. Understand the distinction between the central nervous system and the peripheral nervous system. This quiz will help solidify your knowledge of the basic elements that make up the nervous system.
