Although it is not a member of the parasympathetic nervous system, the adrenal medulla reacts to stress. As mentioned above, the adrenal medulla is a part of the sympathetic branch of the autonomic nervous system but not the parasympathetic branch, and it secretes hormones in reaction to stress.
What is nervous system?
- According to biology's classical idea of the nervous system, an animal's nervous system is a highly sophisticated component that coordinates its movements and sensory data by sending and receiving signals to and from various regions of the body.
- Around 550–600 million years ago, worm-like invertebrates were the first to develop nervous tissue.
- The discovery of electrical signals in plants and their utilization in recent decades, however, has called into question this conventional wisdom.
What constitutes the nervous system's primary organs?
- The brain and spinal cord make up the central nervous system, one of the two major components of the nervous system.
- All of the body's parts are connected by nerves that emerge from the spinal cord and make up the peripheral nervous system.
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