Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.
Control and coordination in animals are carried out by two different systems working together. These are the nervous system and the hormonal system. Both systems ensure that the body responds appropriately to changes in the environment.
The nervous system uses electrical impulses to transmit messages. It gets information from our sense organs and acts through our muscles. The responses of the nervous system can be classified as reflex action, voluntary action, or involuntary action.
On the other hand, hormones provide chemical coordination in animals. Hormones are produced in one part of an organism and move to another part to achieve the desired effect. This system involves many different tissue types and integrates their activities together. A feedback mechanism regulates the action of the hormones.
The key difference between the two mechanisms lies in the nature of message transmission. While the nervous system uses electrical impulses, the hormonal system uses chemical substances called hormones. The nervous system works through sense organs and muscles, whereas hormones travel from one part to another.
Both nervous and hormonal mechanisms work together to provide effective control and coordination in animals.
Explanation
This answer compares and contrasts the two mechanisms as required by the question. The comparison includes: (1) Nature of transmission - electrical impulses vs chemical substances; (2) Pathway - sense organs and muscles vs movement from one body part to another; (3) Types of responses - reflex, voluntary, involuntary actions vs feedback-regulated hormonal action. The contrast highlights that both systems work together for effective control and coordination. The answer uses only facts from the provided context including the 'What you have learnt' section and the chapter content.