I believe the answer is: Eat a well-balanced diet to increase energy and immunity
Even though physical activities improve both our energy and immunity in the long run, they are not as significant as maintaining well balanced diet in your life.
You need to make sure that you get your nutrients from various source of non-processed food in order to fulfill both your macronutrients and micronutrients.
The inner wall of the esophagus is lined with stratified squamous epithelium. It shows up as large purple on your slide. Notice that the cells at the base of this epithelial layer are cuboidal. This is the region where mitosis occurs.
;)
I believe the answer to your question will be that it responds appropriately to the stress.
That would be called a lobotomy.
I hope this helped :)
It usually depends on your schedule if your busy and work late I'd say 7-10 hrs but if you are a normal average person 8 hrs will do the trick