1.1. Cardiac muscle cells are said to be myogenic.

Define myogenic.

1.2. Use Figure 1 to describe the path of electrical activity through the cardiac muscle that leads to the smooth contraction of the heart.

Figure 1

1.3. Identify the receptors that are involved in controlling heart rate.

1.4. When stimulated, sympathetic and parasympathetic nerves have different effects on an individual's heart rate.

State the effect of each.