Question

Most CSF is produced by the _?_.

(a) arachnoid villi

(b) pineal body

(c) choroid plexuses

(d) cisternae

(e) hypophysis.

Answer 1

option C is correct. choroid plexus is produce 80% of the cerebrospinal fluid ( CSF) .

the choroid plexus is network of blood vessels present with in the sections of the 4 th ventricles of the brain.

CSF functions is :

• it protects the brain and spinal cord from trauma
• it supplies nutrients to nervous system tissues.
• it removes waste products from cerebral metabolism.

a) archnoid villi : this is second layer covering the brain. this function is reduce pressure on the central nervous system, partially in the areas of the upper spine ,brain stem.

b) pineal body : it produces melatonin ,it plays important role in sleep pattern.

d) cisternae : it is found in endoplasmic reticulum and golgi apparatus. it is a polysaccharide.

e) hypophysis : another name is pituitary gland. it is duct less gland of endocrine system. this secretes hormones like

• adenocorticotropic hormone ( ACTH)
• thyroid stimulating hormone ( TSH)
• luteinizing hormone (LH)
• follicle stimulating hormone ( FSH)
• prolactin ( PRL)
• growth hormone ( GH)
• melanocyte stimulating hormone ( MSH)