What are some issues or diseases that affect lymphocytes?

150 words minimum for each question. Reference must be in APA format. Must be searchable. Correct English grammar and punctuation.
1.Describe how the endocrine system responds when it is under stress. Describe how the endocrine system responds when it is at rest. What are some similarities in both of the responses?
2. Discuss the importance of lymphocytes and describe where they are found in the body. What are some issues or diseases that affect lymphocytes?
3. What are the roles of the various components of the digestive system. How are ingested materials moved through the digestive tract?
4. Based on studies what constitutes a balanced diet, and why this is important. Provide a small example pf a vegetarian lunch menu that includes all the amino acids necessary for a vegetarian diet.