Biology Forums - Study Force

The choroid plexus is composed of
 A) lymphatic vessels.
  B) blood vessels.
  C) nerve fibers.
  D) ganglia.
  E) subarachnoid granulations.

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(Question 2) Which statement is true regarding the meninges and cerebrospinal fluid of the spinal cord and brain?
 A) Spinal fluid is secreted both in the brain and in the spinal cord areas.
  B) There is an epidural space associated with the spinal meninges, but not with the cranial meninges.
  C) The meninges around the brain are not the same as those around the spinal cord.
  D) There is a subarachnoid space within the spinal meninges but not the cranial meninges.
  E) The choroid plexuses are located only within the brain, not within the spinal cord.

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(Question 3) Cerebrospinal fluid
 A) is secreted by ependymal cells.
  B) is formed by a passive process.
  C) is normally produced twice as fast as it is removed.
  D) has almost the same composition as blood plasma.
  E) contains blood cells and blood plasma.

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(Question 4) The dural fold that projects into the longitudinal fissure between cerebral hemispheres is called the
 A) dural sinus.
  B) falx cerebri.
  C) tentorium cerebelli.
  D) falx cerebelli.
  E) choroid plexus.

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(Question 5) Which of the following is not a property of the blood-brain barrier?
 A) The capillary endothelial cells are interconnected by tight junctions.
  B) It is very permeable to many water and lipid-soluble compounds.
  C) Astrocytes surround the CNS capillaries.
  D) It is absent in portions of the hypothalamus.
  E) It is intact except in areas known as circumventricular organs.

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(Question 6) The brain requires a substantial blood supply. The vessels that deliver blood to the brain are the
 A) external carotid arteries.
  B) facial arteries.
  C) jugular veins.
  D) internal carotid and vertebral arteries.
  E) dural sinuses.

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(Question 7) What structure is covered by many blood vessels and adheres tightly to the surface of the brain?
 A) pia mater
  B) arachnoid mater
  C) dura mater
  D) cranial plexus
  E) choroid plexus

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(Question 8) The dural venous sinuses are located in the
 A) paranasal cavity.
  B) arachnoid folds.
  C) pia mater.
  D) dural folds.
  E) tentorium cerebelli.

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(Question 9) Specialized ________ form the secretory component of the choroid plexus.
 A) epididymal cells
  B) ependymal cells
  C) arachnoid cells
  D) astrocyte
  E) blood cells

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(Question 10) The passageway between the lateral ventricles and the third ventricle is the
 A) posterior foramen.
  B) interventricular foramen.
  C) cerebral aqueduct.
  D) lateral foramen.
  E) central canal.

1) B

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2) E

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3) A

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4) B

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5) B

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6) D

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7) A

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8) D

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9) B

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10) B

Good timing, thanks!