This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Receptors that are stimulated by a change in the chemical composition of the environment are: 
Select and explain. 
A. Mechanoreceptors, B. Chemoreceptors, C. Nocireceptors, D. None of the above
B: Chemoreceptors
Answer: B: Chemoreceptors 
Explanation: Chemoreceptors are those receptors that are stimulated by a change in the chemical composition of the environment. They include receptors for taste and smell and visceral receptors that are sensitive to change in plasma O2, pH and osmolality.