Hemostasis and the Endocrine System

How does the pancreatic endocrine hormones {glucagon and insulin} work antagonistically to maintain homeostasis in the body, during times of feast and times of famine? How is this process related to negative feedback?

Nervous & Musculoskeletal Sytem

Why is the term "action potential" used to describe a nerve impulse? What is the role of sodium ions (Na+) and potassium ions (K+) in generating an action potential. What is a "threshold"?

The sympathetic and parasympathetic nervous systems

What is the body's need for both a sympathetic and a parasympathetic nervous system in relation to homeostasis?

The Digestion System

How is the villus the functional unit of the small intestine? What is the structure and function and the enzymes found there. What is the importance of the surface area to the functioning villi? What an approiate way to counsel a friend who is overweight and blames herself for a lack of self-control?

The body Metabolism

Involving the glycolysis, what is the net gain of ATP? What does "net" mean? For each turn of the Kreb's cycle, how much ATP is produced? How many molecules of CO2 are produced? What is the significance of stripping off high-energy electrons from the pyruvate?