Nervous System Quiz

What is the main function of the nervous system?

• To repair damage and fight infections

• To maintain balance in the body

• To send signals all over the body

• To help us balance and coordinate our movements

Answer explanation

The main function of the nervous system is to send signals all over the body, allowing for communication and coordination of bodily functions.

What is the role of the peripheral nervous system?

• To maintain balance in the body

• To connect us to our external and internal environments

• To govern voluntary movements

• To send signals to and from the brain

Answer explanation

The role of the peripheral nervous system is to connect us to our external and internal environments.

What is the function of the myelin sheath?

• To prevent short circuits in the nervous system

• To repair damaged neurons and nerves

• To carry signals between neurons

• To convert electrical signals into chemical signals

Answer explanation

The function of the myelin sheath is to prevent short circuits in the nervous system.

Which part of the nervous system acts as the main command center?

• Spinal cord

• Peripheral nervous system

• Axon terminal

• Brain

Answer explanation

The main command center of the nervous system is the brain. It controls and coordinates all body functions.

What is the purpose of neurotransmitters?

• To carry signals between neurons

• To repair damaged neurons and nerves

• To prevent short circuits in the nervous system

• To convert electrical signals into chemical signals

Answer explanation

Neurotransmitters carry signals between neurons.

What can happen if the nerves are damaged?

• Difficulty walking or speaking

• Numbness and pins and needle sensations

• All of the above

• Paralysis

Answer explanation

If the nerves are damaged, it can lead to difficulty walking or speaking, numbness and pins and needle sensations, and even paralysis. In this case, all of the above options are correct.

Which of the following diseases affects the nervous system?

• Multiple sclerosis

• None of the above

• Parkinson's disease

• Both A and B

Answer explanation

Both multiple sclerosis and Parkinson's disease affect the nervous system.

What is the approximate number of neurons in the human brain?

• 86 billion

• 860 billion

• 86 million

• 860 million

Answer explanation

The approximate number of neurons in the human brain is 86 billion, making it the correct choice.

What is the size of the human brain compared to two fists laid out?

• The size of a basketball

• The size of two pages of a newspaper

• The size of a watermelon

• The size of a small ball

Answer explanation

The size of the human brain is comparable to two pages of a newspaper, which is the correct choice.

Which nutrients are important for the nervous system to work properly?

• Potassium and vitamin B

• Vitamin B and calcium

• Vitamin B and magnesium

• Potassium and calcium

Answer explanation

The correct choice for nutrients important for the nervous system to work properly is potassium and vitamin B.