What is the function of ependymal cells quizlet?

protects brain and spinal cord from trauma, supplies nutrients to nervous system tissue, and removes waste products from cerebral metabolism.

What do ependymal cells secrete?

cerebrospinal fluid (CSF)
In the adult central nervous system (CNS), the ependymoglial cells contribute to the secretion of the cerebrospinal fluid (CSF) and are an essential component of an important biological barrier system segregating different compartments such as blood, CSF, and CNS interstitial space (blood–brain and blood–CSF barriers; …

What is the function of the ependymal cells of the choroid plexus?

One of the primary functions is to produce cerebrospinal fluid (CSF) via the ependymal cells that line the ventricles of the brain. Secondly, the choroid plexus serves as a barrier in the brain separating the blood from the CSF, known as the blood-CSF barrier.

What is the function of Schwann cells quizlet?

What do Schwann cells do? These glial cells wrap around PNS axons to form a myelin sheath. Each Schwann cell only myelinates one axon (contrast to oligodendrocytes). Schwann cells also help an axon regenerate if it is damaged.

What is the function of these glial cells?

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.

What is the function of the choroid plexus quizlet?

What is the function of the choroid plexus? The choroid plexus produces cerebrospinal fluid.

What is the main function of oligodendrocytes?

In the central nervous system (CNS), oligodendrocytes assemble myelin, a multilayered sheath of membrane, spirally wrapped around axonal segments and best known for its role in enabling fast saltatory impulse propagation1,2.

What is a neurons function?

Neurons (also called neurones or nerve cells) are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.

What is the function of arachnoid granulations quizlet?

Arachnoid granulations act as one-way valves. Normally the pressure of the CSF is higher than that of the venous system, so CSF flows through the villi and granulations into the blood. If the pressure is reversed for some reason, fluid will pass back into the subarachnoid space (of the brain).

What forms the choroid plexus?

Choroid plexus is composed of cuboidal epithelial cells resting on a basal lamina which are adjacent to highly fenestrated blood vessels separated by the stroma. The tight junctions located between the apical parts of the choroid plexus epithelial cells form the blood–cerebrospinal fluid barrier (Kaur et al., 2016).

What is the function of arachnoid villi quizlet?

What is the function of arachnoid villi? knoblike projections of arachnoid that protrude superiorly through the dura mater and into the superior sagital sinus. What is the function of the optic nerve? to carry afferent impulses associated with vision.

What is the function of arachnoid granulations?

Arachnoid granulations are structures filled with cerebrospinal fluid (CSF) that extend into the venous sinuses through openings in the dura mater and allow the drainage of CSF from subarachnoid space into venous system.

Which limbic system structure is one of the memory processing centers of the cerebrum?

Hippocampus. There are two hippocampi, located in each hemisphere of the brain. They are seahorse-shaped and are structures mainly associated as being the memory centres of our brains.

Which sensory area exhibits the dorsal stream pathway of processing?

Which sensory area exhibits the dorsal stream pathway of processing? The primary visual cortex exhibits the dorsal stream pathway of processing.

Where is CSF absorbed?

According to the traditional understanding of cerebrospinal fluid (CSF) physiology, the majority of CSF is produced by the choroid plexus, circulates through the ventricles, the cisterns, and the subarachnoid space to be absorbed into the blood by the arachnoid villi.

What is the difference between arachnoid villi and arachnoid granulations?

Arachnoid granulations or villi are growths of arachnoid membrane into the dural sinuses, through which the CSF enters the venous system from the subarachnoid space. Arachnoid villi are microscopic, whereas arachnoid granulations represent distended villi and are visible to the naked eye.

What is CSF flow?

Cerebrospinal Fluid (CSF) flows through the four ventricles and then flows between the meninges in an area called the subarachnoid space. CSF cushions the brain and spinal cord against forceful blows distributes important substances and carries away waste products.

How does CSF enter the subarachnoid space?

CSF flows from the lateral ventricle to the third ventricle through the interventricular foramen (also called the foramen of Monro). … CSF then flows into the subarachnoid space through the foramina of Luschka (there are two of these) and the foramen of Magendie (only one of these).

What cell makes CSF?

choroid plexus
The epithelial cells of the choroid plexus secrete cerebrospinal fluid (CSF), by a process that involves the movement of Na(+), Cl(-) and HCO(3)(-) from the blood to the ventricles of the brain.

Does CSF go to the heart?

Normal route of CSF from production to clearance is the following: From the choroid plexus, the CSF flows to the lateral ventricle, then to the interventricular foramen of Monro, the third ventricle, the cerebral aqueduct of Sylvius, the fourth ventricle, the two lateral foramina of Luschka and one medial foramen of …

How does CSF protect the brain?

CSF provides hydromechanical protection of the neuroaxis through two mechanisms. First, CSF acts as a shock absorber, cushioning the brain against the skull. Second, CSF allows the brain and spinal cord to become buoyant, reducing the effective weight of the brain from its normal 1,500 grams to a much lesser 50 grams.