The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
What makes up the peripheral nervous system?
The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions .
What are the type of peripheral nervous system?
There are three types of peripheral nerves: motor, sensory and autonomic . Some neuropathies affect all three types of nerves, while others involve only one or two.
What does the peripheral nervous system consist of quizlet?
The peripheral nervous system includes the cranial nerves (connected to brain innervate the head), spinal nerves (connected to spinal cord innervates the rest of the body), and ganglia (collections of neuron cell bodies in the PNS).
What are the four main divisions of the peripheral nervous system?
The peripheral nervous system is subdivided into nerves, the autonomic system, and the somatic system . The autonomic nervous system is further subdivided into the parasympathetic and sympathetic nervous systems. The enteric nervous system is an independent subsystem of the peripheral nervous system.
What are Schwann cells made of?
A well-developed Schwann cell is shaped like a rolled-up sheet of paper, with layers of myelin between each coil . The inner layers of the wrapping, which are predominantly membrane material, form the myelin sheath, while the outermost layer of nucleated cytoplasm forms the neurilemma.
What are the three types of peripheral nerves?
There are three types of peripheral nerves in the peripheral nervous system. They are your motor nerves, sensory nerves, and atomic nerves . If you have peripheral neuropathy that we will discuss later, that could affect all three types of peripheral nerves, or just one or two.
Which parts make up the major components of the peripheral nervous system quizlet?
consists of afferent nerves, sensory cranial and spinal nerves that connect somatic receptors to the central nervous system (CNS), and efferent nerves, motor cranial and spinal nerves that connect the CNS to skeletal muscles.
Which of the following make up the peripheral nervous system PNS?
The PNS can be divided into two components: the somatic nervous system and the autonomic nervous system . The somatic nervous system (SNS) and the autonomic nervous system (ANS) are both part of the peripheral nervous system.
Which branches make up the peripheral nervous system quizlet?
What branches make up the peripheral nervous system? The somatic, parasympathetic, and sympathetic nervous systems all lie outside the central nervous system. You just studied 10 terms!
What is the role of the PNS?
The PNS has three basic functions: (1) conveying motor commands to all voluntary striated muscles in the body ; (2) carrying sensory information about the external world and the body to the brain and spinal cord (except visual information: the optic nerves, which convey information from the retina to the brain, are in ...
What is CNS and PNS?
Our nervous system is divided in two components: the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS) , which encompasses nerves outside the brain and spinal cord.
What are the components of peripheral nervous system class 10?
- Somatic Nervous System.
- Autonomic Nervous System.
What do glia cells do?
Primarily, glial cells provide support and protection to the neurons (nerve cells), maintain homeostasis, cleaning up debris, and forming myelin. They essentially work to care for the neurons and the environment they are in.
Is the myelin sheath made up of Schwann cells?
Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath (Figure 1A).
How is myelin sheath formed in PNS?
Myelin is formed by Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS). Each Schwann cell forms a single myelin sheath around an axon. ... Myelin itself forms by the spiral wrapping around an axon of an enormously expanded glial plasma membrane that then compacts.
What are the main components of the central nervous system?
- The central nervous system is made up of the brain and spinal cord.
- The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
What are the 6 main components of the peripheral nervous system?
| Components Functions | *All the nerves in the body outside of the spinal cord and brain *Includes sensory cells, motor nerve cells, and somatic cells *Connects the central nervous system to the parts of the body *Relays information and responses *Controls body functions |
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What are the two major components of the peripheral nervous system quizlet?
PNS has two major subdivisions – Somatic Nervous system and the Autonomic nervous system . Define the functions of the autonomic nervous system and explain its role in behavior.
What are the major components of the central nervous system and the peripheral nervous system quizlet?
The Central nervous system is made up of the brain and spinal cord , while the cranial nerves and spinal nerves constitute the peripheral nervous system.
Which of the following structures make up the CNS and which make up the PNS?
The Brain and Spinal Cord Are the Central Nervous System. Nerves and Sensory Organs Make Up the Peripheral Nervous System.
Which of the following is not the component of the PNS?
brain is NOT a part of the peripheral nervous system. The brain, brain stem and spinal cord are all components of the central nervous system...
What two divisions of nerve cells make up the peripheral nervous system?
Ganglia are collections, or small knots, of nerve cell bodies outside the CNS. The peripheral nervous system is further subdivided into an afferent (sensory) division and an efferent (motor) division . The afferent or sensory division transmits impulses from peripheral organs to the CNS.
How does CNS and PNS work together?
The PNS and CNS work together to send information between the brain and the rest of the body . Nerves emerge from the CNS through the skull and vertebral column, using the PNS to carry information to the rest of the body. The PNS is made up of two divisions – sensory and motor.
What is the main role of the peripheral nervous system quizlet?
The peripheral nervous system, or PNS, consists of the nerves and ganglia outside of the brain and the spinal cord. The main function of the PNS is to connect the central nervous system (CNS) to the limbs and organs .
Do glial cells make up the myelin sheath?
Oligodendrocytes form the myelin sheath around axons. ... Glial cells of the (b) peripheral nervous system include Schwann cells , which form the myelin sheath, and satellite cells, which provide nutrients and structural support to neurons.
What do satellite cells do in PNS?
glial cells that surround some neurons in the peripheral nervous system. Their role is not fully understood, but it is thought they provide nutrient support and protection . They may also help to regulate the neuronal environment and be involved in neurotransmission.
Is Neuroglia a connective tissue?
The concept of neuroglia as a connective tissue of the central nervous system (CNS) within “which the nervous system elements are embedded” 1 was introduced by Rudolf Virchow.
