GENERAL HISTOLOGY

Detailed explanation-1: -The signal transmission of the nervous system is fast because neurons are interconnected, but the functions are more short-lived. Signal transmission in the endocrine system is slow, since hormones must travel through the bloodstream, but the responses tend to last longer.

Detailed explanation-2: -The sympathetic nervous system is a faster system as it moves along very short neurons. When the system is activated, it activates the adrenal medulla to release hormones and chemical receptors into the bloodstreams. The target glands and muscles get activated.

Detailed explanation-3: -In general, the nervous system involves quick responses to rapid changes in the external environment, and the endocrine system is usually slower acting-taking care of the internal environment of the body, maintaining homeostasis, and controlling reproduction (Table 14.1. 1).

Detailed explanation-4: -Hormones can control the body, and the effects are much slower than the nervous system, but they last for longer.

Detailed explanation-5: -The endocrine and nervous systems are similar in that both involve the transmission of a message that is triggered by a stimulus and produces a response. But because nerve impulses can travel much faster than blood-borne substances, nervous system responses are more rapid.