Question 1 (5 points)
Briefly describe the journey that a bite of food takes through the digestive system, starting at the mouth an ending at the anus. Include the structures through which the food passes, and what is happening in each location as the food moves through.
Question 2 (5 points)
Many pathogens evade the immune system by altering their outer surface in some way. Based on what you know about the functioning of the immune system, why is this often a successful approach?
Question 3 (5 points)
What is an opportunistic infection? Name two diseases or conditions that could result in opportunistic infections. Explain your answer.
Question 4 (5 points)
Briefly describe how the hormones FSH and LH are involved in regulating the female reproductive system. Do they have any role in the male reproductive system? Explain.