Answer
Both the nervous system and the endocrine system act to maintain homeostasis of other body systems. These two systems are similar in some ways ; they influence each other, and corporate in the regulation of other systems .
Hormone secretion is regulated partly by signals from neurons, and partly by chemical signals. Hormones influence growth and development of neurons--thyroxin, GH, and insulin. Also, parathyroid hormones maintain proper levels of Ca++ necessary for generation and propagation of nerve impulses. Some structures can be considered as belonging
to both the nervous and the endocrine systems. For example, the , the neurons of the paraventricular, and the supraoptic nuclei of the hypothalamohypophyseal tract secrete the hormones
oxytocin, and antidiuretic hormones (ADH) respectively. Some people consider the pineal gland part of the diencephalon of the nervous system; it secretes the hormone melatonin. In spite of all these similarities , in their control of systems homeostasis, the endocrine and the nervous systems employ methodologies that are typically and qualitatively different in several respects.
Work Step by Step
The response of nervous system is very fast-- milliseconds. The response of endocrine system is slower --seconds-days. Nervous systems act through nerve impulses, and neurotransmitters; they usually have specific local targets --neurons, muscles, and glands. Endocrine systems act on distant targets through hormones which are released into the blood. The targets of the endocrine system are all body cells ( virtually).
