Endurance trained athletes often have a decreased heart rate compared to that of a non-athlete when both are resting.Explain why an endurance trained athlete’s heart rate decreases rather than increases.Use the terms stroke volume& cardiac output, in your answer.

 
 
 
 

Harry met Sally in a biology class.During a lab exercise, they determined that Harry’s blood is type AB+, and Sally’s is O-.Their relationship has grown & they are now planning to marry & have children. What are the circulatory consequences of their union? Explain your answer.

2A. Can they donate blood to each other?

2B. Might children be at risk?


 
 

Coronary bypass surgery is often performed when a region of a coronary artery is blocked.A section of vein from the patient’s leg is then removed and sutured so that it makes a connection between the aorta and the coronary artery, past the region that is blocked.Why is it important for the surgeon to suture the vein in place in the correct orientation?What would happen if the piece of vein were sutured in backwards?


 
 

Explain what the two numbers of the blood pressure represent. be sure to include their ‘official’ name, and what information they give to the clinician. Identify 3 factors that affect blood pressure, and indicate how they affect it. 
 
 
 

 
High blood pressure (hypertension) can signal abnormal aldosterone secretion.Would high blood pressure be associated with hypo secretion or hyper secretion of aldosterone?