A client asks the nurse to explain the digestive tract layers because the client is experiencing upper GI problems. When talking about the mucosa layer, the nurse will emphasize that the roles/functions of this layer consist of: Select all that apply

Question

A) Production of mucus to protect and lubricate the inner lining
B) Beginning of the digestive process by secreting enzymes to break food down
C) Contracting of smooth muscles to propel food forward
D) Supporting the abdominal viscera with its connective tissue

Answer 1

Ans: A, B
Feedback:
The inner layer is the mucosal layer that produces mucus. This mucus protects and lubricates the inner lining of the GI tract lumen. Secretion of digestive enzymes and substances that break food down, absorption of the breakdown products of digestion, and maintenance of a barrier to prevent the entry of noxious substances and pathogenic organisms also occur in the mucosal layer. Contracting of smooth muscles to propel food forward occurs in the muscularis externa layer. Supporting the abdominal viscera with its connective tissue is the role of the serous layer.