Spinal Cord Quiz

What is the primary function of the spinal cord?

• To produce red blood cells

• To serve as the main pathway for information connecting the brain and peripheral nervous system

• To filter blood impurities

• To synthesize vitamin D

How many pairs of spinal nerves are there in the human body?

• 12

• 24

• 31

• 36

Which type of somatic reflex involves a single synapse between the sensory neuron and the motor neuron?

• Polysynaptic reflex

• Monosynaptic reflex

• Stretch reflex

• Withdrawal reflex

What is the primary role of gray matter in the spinal cord?

• To insulate the spinal cord

• To serve as the main conduit for electrical signals

• To process and integrate information

• To protect the spinal cord from injury

Through which part of the spinal cord do sensory signals enter?

• Ventral root

• Dorsal root

• Lateral column

• Central canal

What is the role of motor neurons in the reflex arc?

• To receive sensory input directly from the environment

• To transmit sensory information to the brain

• To carry impulses from the spinal cord to effectors

• To insulate and protect nerve fibers

Which of the following is NOT a function of the spinal nerves?

• Transmitting sensory information to the spinal cord

• Conducting motor commands from the brain to the muscles

• Synthesizing neurotransmitters

• Providing a pathway for reflexes

What is the significance of the stretch reflex?

• It helps in the withdrawal of a limb from a painful stimulus

• It prevents muscle overstretching and injury

• It aids in the relaxation of muscles

• It facilitates voluntary movements

In which part of the spinal cord is the white matter primarily located?

• In the outer layer

• In the inner layer

• In the dorsal root

• In the ventral root

What is the main difference between a monosynaptic reflex and a polysynaptic reflex?

• The number of neurons involved

• The speed of the response

• The location in the body

• The type of stimulus required