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
Activation of which of the following receptors would be expected to decrease anxiety? 
Select and explain. 
A. nicotinic cholinergic receptors, B. glutamate receptors, C. GABA A  receptors, D. glucocorticoid receptors
C: GABA A  receptors
Answer: C: GABA A  receptors 
Explanation: Meissner and Pacinian corpuscles are examples of rapidly adapting receptors, and Merkel cells and Ruffini endings are examples of slowly adapting receptors.
Ganong 23 rd ed, pg 153