Question 1:

Which of the following is the primary function of the nervous system?

Explanation: The primary function of the nervous system is the facilitation of communication and coordination throughout the body. It consists of the brain, spinal cord, and peripheral nerves, which transmit electrical signals to control various bodily functions and respond to stimuli. Therefore, option C is correct.

Question 2:

Which of the following is the functional unit of the nervous system?

Explanation: The functional unit of the nervous system is the neuron. Neurons are specialized cells that transmit electrical impulses, allowing for the transmission of information throughout the nervous system. Therefore, option A is correct.

Question 3:

Which of the following is responsible for transmitting electrical signals away from the neuron's cell body?

Explanation: The axon is responsible for transmitting electrical signals away from the neuron's cell body. It is a long, slender extension of the neuron that carries the nerve impulses to other neurons, muscles, or glands. Therefore, option B is correct.

Question 4:

Which part of the brain is responsible for regulating vital functions such as breathing and heart rate?

Explanation: The medulla oblongata, located at the base of the brainstem, is responsible for regulating vital functions such as breathing and heart rate. It controls involuntary actions and helps maintain homeostasis. Therefore, option C is correct.

Question 5:

Which of the following is a neurotransmitter associated with pleasure and reward?

Explanation: Dopamine is a neurotransmitter associated with pleasure and reward. It plays a role in motivation, reinforcement, and the experience of pleasure. Imbalances in dopamine levels are associated with various neurological and psychiatric disorders. Therefore, option B is correct.