How many lobes does the surface of the cerebral hemisphere possess?

Which of the following is not an involuntary action?

What constitutes the central and peripheral nervous systems? How are the components of the central nervous system protected?

Which of the following statements are true?
$(i)$ Sudden action in response to something in the environment is called reflex action.
$(ii)$ Sensory neurons carry signals from the spinal cord to muscles.
$(iii)$ Motor neurons carry signals from receptors to the spinal cord.
$(iv)$ The path through which signals are transmitted from a receptor to a muscle or a gland is called a reflex arc.

Which part of the brain is responsible for the coordination of physical movements like dancing, cycling, and walking?

Which signals will get disrupted in case of a spinal cord injury?