A& P CH 11 Sections 11.1-11.2
Which of the following neuroglia is most responsible for helping determine capillary permeability in nervous tissue?
Astrocytes
Which of the following types of glial cells are the most abundant and versatile and aid in making exchanges between capillaries and neurons?
Astrocytes
Somatic motor fibers carry information from the _______.
CNS to skeletal muscles.
Which of the following neuroglia line the central cavities of the brain and spinal cord and provide a fairly permeable barrier between the CSF and nervous tissue?
Ependymal cells
Which of the following types of glial cells line the central cavities of the brain and spinal cord, where they help to circulate the cerebrospinal fluid?
Ependymal cells
Microglial cells
Small, ovoid cells with thorny processes that touch and monitor neurons Migrate toward injured neurons Can transform to phagocytize microorganisms and neuronal debris
Which of the following divisions of the nervous system is also known as the involuntary nervous system?
The autonomic nervous system
What is the primary difference between the somatic nervous system and the autonomic nervous system?
The somatic nervous system allows us to consciously control our skeletal muscles, and the autonomic nervous system controls activities that humans cannot consciously control, such as the pumping of the heart and the movement of food through the digestive tract.
The somatic nervous system __________.
conduct impulses from the CNS to skeletal muscles
The peripheral nervous system __________.
consists of cranial and spinal nerves carrying impulses to and from the brain and spinal cord.
The central nervous system __________.
consists of the brain and spinal cord
The nervous system processes and interprets sensory input and decides what should be done at each moment—a process called
integration
oligodendrocytes
line up along the thicker nerve fibers in the CNS and wrap their processes tightly around the fibers, producing an insulating covering called a myelin sheath.
Schwann cells
myelinate axons in the peripheral nervous system
Visceral sensory (afferent) fibers carry information from the _______.
organs in the ventral body cavity to the CNS.
a neuron carrying information from the eye to the brain. This neuron is best described as a
sensory nerve fiber within a cranial nerve.
The somatic sensory (afferent) fibers of the peripheral nervous system transmit information from the __________ to the CNS.
skin
Somatic sensory (afferent) fibers carry information from the _______.
skin, skeletal, muscles, and joints to the CNS.
Bodily functions that follow "a law unto itself" are controlled by the involuntary nervous system. This system is also termed __________ and functions to __________.
the autonomic nervous system (ANS); conduct impulses from the CNS to cardiac muscle, smooth muscle, and glands
Peripheral Nervous System (PNS)
the sensory and motor neurons that connect the central nervous system (CNS) to the rest of the body.
The voluntary nervous system is to the involuntary nervous system as ________.
the somatic nervous system is to the autonomic nervous system.
Microglial cell processes
touch nearby neurons, monitoring their health, and when they sense that certain neurons are injured or in other trouble, the microglial cells migrate toward them.
