Fill in the blanks: The spinal cord extends from the of the occipital bone to th

Question

Fill in the blanks: The spinal cord extends from the of the occipital bone to the vertebra. It terminates as the and gives off a bundle of nerve roots called the. Matching: March the cranial nerve with its main functions. A. Sensory to the face, motor to the muscles of mastication B. Motor to the trapezius and sternocleidomastoid muscles C. Hearing and equilibrium D. Olfaction (smell) E. Motor to the muscles of swallowing; taste to the posterior one-third of the tongue F. Motor to one-sixth of the extraocular muscles (superior oblique muscle) G. Motor to the tongue H. Vision I. Motor to the muscles of facial expression, taste to the anterior two-thirds of the tongue J. Motor to four-sixths of the extraocular muscles, dilates the pupil, opens the eve, change the shape of the lens K. Motor to the muscles of swallowing and speaking, motor to the thoracic and abdominal visccra L. Motor to one-sixth of the extraocular muscles (lateral rectus muscle) The receptor that detects the stretch in a stretch reflex is called a(an)

Explanation / Answer

The cranial nerves are the nerves that emerge directly from the brain.

1. The Cranial nerve I (Olfactory) functions in olfaction (smell). Option D

2. The Cranial Nerve II (Optic)functions in vision. option H

3. The cranial nerve III(oculomotor) functions in Motor to four-sixths of the extraocular muscles, dilates pupil, opens eye, changes the shape of the lens. Option J.

4.The cranial nerve IV (trochlear) moves th eyeballs by sending signals though the superior oblique muscles. Option F

5. The cranial nerve V (trigeminal) functions in providing sensation to the face and also controls the muscles of mastication.Option A.

6. The cranial nerve VI( abducens)moves the eye balls outwards by sending signals to lateral rectus muscles. Option L

7. The cranial nerve VII (facial) motor to the muscles of facial expression, taste to the anterior two-third of the tongue. Option I

8. The cranial nerve VIII( vestibulocochlear) functions in hearing and equilibrium.. Option C

9. The Cranial nerve IX (glossopharyngeal) functions in motor to the muscles of swallowing: taste to the posterior one-third of the tongue. Option E

10.The Cranial nerve X (vagus) is motor to the muscles of swallowing and speaking, motor to the thoracic and abdominal viscera. Option K

11. The cranial nerve XI (accessory) functions in motor to trapezius and sternocleidomastoid muscles. Option B

12. The cranial nerve XII (hypoglossal) functions in motor to tongue. Option G

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