Question

1. Bundles of nerve fibers traveling up or down the white matter of the spinal cord are called 2. Fibrous sheath enclosing a nerve is known as 3. Nerve fibers that conduct sensory signals to the central nervous system is known as 4. Paralysis of only one side of the body is known as 5·The ventricles of the brain are filled with a liquid calledーーーーーーーーーーーーー 6. The cerebral cortex consists of folds of tissue called separated by grooves called , the "gateway 7. The largest part of the diencephalon is the to the cerebral cortex." 8. The 10. Deep pressure and vibration are detected by cutaneous sense organs called around a central sensory dendrite. division has ganglia on or near target organs. which have onionlike layers of connective tissue 11. The sharpest or most detailed daytime vision occurs in a region of the retina called the 12. Function of the semicircular ducts. and 13. The posterior pituitary gland secretes 14. Source of hormones that stimulate lymphocyte activity. 15. The celiac ganglion is part of the division.

Answer 1

Q-1

Bundles of nerve fibres traveling up or down the white matter of spinal cord are called tracts.

EXPLANATION-

Spinal cord contains so many different types of nerve fibres which runs up and down carrying different informations.

These fibres are collectively called ascending tract and descending tract.

They carry sensory and motor stimulus from and to the PNS.

Q-2

Fibrous sheath enclosing a nerve is known as epineurium.

EXPLANATION

Epineurium is the outermost layer of the nerve.

A nerve fiber contains 3 layers - epineurium, mesoneurium, endoneurium.

Epineurium is made up of dense connective tissue.

Endoneurium is the innermost layer of nerve.

Epineurium carries information from nerve surface to the PNS.

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