A cell can only respond to signals from other cells, not from the physical environment. receptor activation. The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on: the presence of the appropriate receptors on the cells of the target tissue or organ.
Answer:
Functions of the circulatory, respiratory, and nervous system in gas exchange are interconnected with each other in the following manner:
The circulatory system is responsible to pumps blood around the body. The circulation system allows the absorption of oxygen and releases carbon dioxide in the lungs and the Respiratory system also take oxygen in and releases carbon dioxide. The circulatory system and respiratory system work hand in hand. The brain or nervous system monitors gas or oxygen level in blood and regulates respiratory rate.
A protein may consist of as many as 5,000 a.a.ms.
