Which is not a general function of the nervous system? A. Transporting materials throughout the body B. Collecting information C. Processing and evaluating information D. Responding to information E. No exceptions; all are general functions of the nervous system
The correct answer and explanation is:
Correct Answer: A. Transporting materials throughout the body
The nervous system plays a critical role in maintaining homeostasis and coordinating body activities. However, its general functions do not include transporting materials throughout the body. This task is primarily carried out by the circulatory system, which includes the heart, blood vessels, and blood. The circulatory system delivers oxygen, nutrients, hormones, and other essential substances to tissues and removes waste products like carbon dioxide.
The general functions of the nervous system include the following:
- Collecting Information: The nervous system gathers sensory input from internal and external environments through sensory receptors. This information allows the body to detect changes and stimuli, such as temperature, light, or pain.
- Processing and Evaluating Information: Once sensory input is collected, the central nervous system (CNS), composed of the brain and spinal cord, processes and integrates the information. This step involves interpreting the data and deciding on an appropriate response.
- Responding to Information: Based on the processed data, the nervous system sends signals to effectors (muscles or glands) to generate a response. This could involve moving a muscle, secreting a hormone, or altering physiological states.
The nervous system’s functions are facilitated by its two main divisions: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS processes and integrates data, while the PNS transmits signals between the CNS and the rest of the body.
In contrast, transporting materials like oxygen, nutrients, and waste removal is beyond the nervous system’s domain. These processes are essential for supporting nervous tissue but are distinct functions of other systems, such as the circulatory and lymphatic systems.