Blood Brain Barrier Function and Components

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What is the main structural component of the Blood Brain Barrier (BBB)?

Schwann cells

Perivascular astrocytes feet

Basement membrane

Capillary endothelium with occluding junctions (correct)

Which of the following is NOT a function of the Blood Brain Barrier (BBB)?

Protect neurons and glia from exogenous substances

Regulate passage of molecules and ions from blood to the brain

Maintain stable composition of ions in the interstitial fluid

Monitor plasma components in the hypothalamus (correct)

Which region of the brain does not have the Blood Brain Barrier (BBB)?

Cerebellum

Choroid plexus (correct)

Hypothalamus

Posterior pituitary

What envelops the basement membrane of capillaries in most Central Nervous System (CNS) regions?

Perivascular astrocytes feet Signup and view all the answers

What is the main component of the Peripheral Nervous System (PNS) in terms of nerve structure?

Nerve fibers (axons) Signup and view all the answers

What surrounds axons in the peripheral nerves of the Peripheral Nervous System (PNS)?

Schwann cells Signup and view all the answers

What is the main function of microglia in the CNS?

Acting as the major immune defense mechanism Signup and view all the answers

Which of the following cells do microglia originate from?

Circulating blood monocytes Signup and view all the answers

What is the main component of white matter in the central nervous system?

Myelinated axons Signup and view all the answers

Where are most synapses found in the central nervous system?

Gray matter Signup and view all the answers

Which layer of the cerebellar cortex consists of large neurons called Purkinje cells?

Outer molecular layer Signup and view all the answers

What is the primary role of oligodendrocytes in the central nervous system?

Producing myelin around axons Signup and view all the answers

What is the functional division of the nervous system responsible for sensory input perceived consciously?

Somatic sensory division Signup and view all the answers

Which layer of the embryonic development does the nervous tissue originate from?

Ectoderm Signup and view all the answers

Which type of neuron circuit involves two neurons to transmit information?

Mono-synaptic circuit Signup and view all the answers

What is the primary function of the motor division of the nervous system?

Controlling voluntary muscle movements Signup and view all the answers

Which type of nerve fibers transmit information between the central nervous system and internal organs?

Efferent fibers Signup and view all the answers

What is the main role of glial cells in the nervous system?

Supporting and protecting neurons Signup and view all the answers