A man has lost blood as a result of a gunshot wound. Even though the bleeding has been stopped, his blood pressure is low and dropping and his heart rate is elevated. Following a blood transfusion, his blood pressure increases and his heart rate decreases. Describe the feedback mechanism(s) by which these physiological changes occur.
A variety of chemical messengers, which normally regulate acid secretion in the stomach, bind to proteins in the plasma membranes of the acid secreting cells. Some of these binding reactions lead to increased acid secretion, and others to decreased secretion. In what ways might a drug that causes decreased acid secretion be acting on these cells?
Describe in as many directional terms as you can the relationship between your thumb and your elbow.
On her first anatomy and physiology exam, Heather defined homeostasis as "the condition in which the body approaches room temperature and stays there." Do you agree with Heather's definition?
Marathon runners can become dehydrated due to the extreme physical activity. What types of fluids should they consume in order to rehydrate their cells?