Briefly describe the pathway of electrical activity in the heart including each structure.

The sympathetic branch of the autonomic nervous system is known as the ___________ and innervates the heart via the ____________ nerve

In response to a chronic exercise intensity the human body can convert muscle fiber types to increase skeletal muscle efficiency. For long distance or aerobic events, what type of skeletal muscle fiber would be most abundant and how would you describe the make up of this fiber type? (capillary density, mitochondrial density, contractile speed, etc.)

In five sentences, discuss dual innervation as it relates to the autonomic nervous system. In your response give a physiological example of this fine tuned control system. (i.e. how does this system increase and decrease physiological outcomes in response to an exercise intensity)

When myosin binds to actin, it forms a ____________?

The autonomic nervous is responsible for maintenance of blood pressure, heart rate, blood redistribution, and respiration changes during the rest to exercise transition. We discussed two branches of that system. What is the main job of the parasympathetic branch of the autonomic nervous system?

Cardiac muscle cells are connected via this structure, which allows for the uniform delivery of an electrical impulse across the entire heart. That is known as a functional syncytium.

What occurs at the beginning of exercise to the distribution of blood flow? Which branch of the autonomic nervous system is responsible for this shift in blood flow distribution?

List each component of the conductive and respiratory zone. What is the job of each zone?

                                 #3 A. ID the organ indicated by black arrow  = [A]B. ID the organ indicated by green arrow  = [B]