Which of the following is the primary function of the nervous system?
Explanation: The correct answer is D) Transmit and process information. The primary function of the nervous system is to transmit and process information throughout the body. It receives sensory input from the environment, processes the information, and generates appropriate responses, such as muscle contractions or glandular secretions.
Which of the following is the main component of the central nervous system?
Explanation: The correct answer is A) Brain. The brain is the main component of the central nervous system. It is responsible for processing and integrating information, coordinating bodily functions, and controlling behavior. The brain is protected by the skull and is connected to the rest of the body through the spinal cord.
Which of the following is responsible for transmitting electrical signals in the nervous system?
Explanation: The correct answer is A) Neurons. Neurons are specialized cells that transmit electrical signals, called action potentials, in the nervous system. These signals allow for communication and coordination between different parts of the body. Glial cells, on the other hand, support and protect neurons but do not transmit electrical signals.
Which division of the nervous system controls voluntary movements?
Explanation: The correct answer is C) Somatic nervous system. The somatic nervous system is responsible for controlling voluntary movements. It consists of motor neurons that send signals from the central nervous system to skeletal muscles, allowing for conscious control of movement. The autonomic nervous system, on the other hand, controls involuntary functions such as heart rate and digestion.
Which part of the nervous system is responsible for coordinating rapid, involuntary responses to stimuli?
Explanation: The correct answer is D) Reflex arc. A reflex arc is a rapid, involuntary response to a stimulus that is coordinated by the spinal cord without involvement of the brain. Examples of reflexes include pulling your hand away from a hot surface or blinking in response to a sudden bright light. The sympathetic and parasympathetic nervous systems are divisions of the autonomic nervous system responsible for regulating involuntary bodily functions, while the enteric nervous system controls digestion.