Q1. A subject extends his arm palm up to catch a falling object. The contact of object with the hand triggers a reflexive response in the biceps muscle. But this response is different and opposite if the object is a raw egg instead of a ball. Explain why with reason?

Q2. Many physiological changes occur during exercise.

a. plan a controlled experiment to test the hypothesis that an exercise session causes short-term increases in heart rate and breathing rate in human.

b. Explain how at least three organ systems are affected by this increased physical activity and examine interactions among these systems.