Question

1) Check all that are components of the sympathetic innervation of the heart.

Check All That Apply

Cervical sympathetic ganglion

Spinal cord Spinal cord

Vagus nerve (CN X)

Cardiac nerve

Sympathetic postganglionic axon

2) Check all that occur during ventricular contraction.

Check All That Apply

The AV valves open to allow blood to enter the ventricles from the atria.

The semilunar valves remain closed to prevent backflow of blood into the ventricles.

The semilunar valves open to allow blood to flow into the large arteries.

The AV valves close to prevent backflow of blood into the atria.

3) Put the pattern of circulation into the correct order, beginning with the pulmonary circulation.

Blood enters the plumonary arteries and travels to the lungs.

Blood leaves the right side of the heart.

Blood enters the plmonary veins.

Blood enters the system arteries.

Blood delivers oxygen to the tissues, and then enters systematic veins.

Blood enters the left side of the heart.

4)Check all that are characteristics of cardiac muscle.

Check All That Apply

Cells are long and cylindrical.

Cells are short and branching.

Cells have multiple nuclei at the periphery of the cell.

Cells have one or two nuclei in the center of the cell.

They are composed of thick and thin filaments.

The functional contractile unit is the sarcomere.

Answer 1

1. Option 2nd, 4th and 5th are correct. Vafus nerve is parasympatheic and cervical sympathetic ganglion innervates cervical region.

2. Option 3rd and 4th are correct. During contraction blood leaves the ventricle and enter to the pulomonary and systemic circulation. AV node prevents back flow the atrium while semilunar valve remains open to allow to enter the blood into pulmonary and systemic arteries.

3. the correct order is: 2nd, 1st, 3rd, 6th, 4th, 5th.

4. Option 2nd, 4th, 5th and 6th are correct.