There are how many pairs of cranial nerves in human?
Correct Answer:
(B) 12
Nerves that exit from the cranium are called cranial nerves. There are 12 pairs of cranial nerves which are found on the ventral (bottom) surface of the brain.
Ques: 2
How many pairs of nerves arise from the spinal cord?
Correct Answer:
(B) 31
Nerves that arise from the spinal cord are called spinal nerves. A spinal nerve is a mixed nerve, which carries motor, sensory and autonomic signals between the spinal cord and the body. In human there are 31 pairs of spinal nerves, one on each side of the vertebral column. These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccygeal regions of the spine. There are eight pairs of cervical nerves, twelve pairs of thoracic nerves, five pairs of lumbar nerves, five pairs of sacral nerves and one pair of coccygeal nerves. The spinal nerves are part of the peripheral nervous system.
Ques: 3
The brain is responsible for:
Correct Answer:
(D)
All of the above three
The brain is composed of the cerebrum, cerebellum, and brainstem. The cerebrum is the largest part of the brain and it performs higher functions like interpreting touch, vision and hearing as well as speech, reasoning, learning and fine control of movement. The function of the cerebellum is to coordinate muscle movements, maintain posture and balance. The brainstem performs many automatic functions such as breathing, heart rate, body temperature, woke and sleep cycles, digestion, etc. Hence, option (d) is the correct answer.