Anxious cricket fans may feel their hearts racing during tense moments—this is due to faster electrical activity in the heart.
Refer to the diagram below:
The bottom graph shows the cardiac action potential of a contractile cell.
Image B shows the conduction of electrical signals from the SA node through the cardiac muscle.
However, one of the features depicted in Image B is inaccurate. Identify the best option:

Question

Anxious cricket fans may feel their hearts racing during tense moments—this is due to faster electrical activity in the heart.

Refer to the diagram below:

The bottom graph shows the cardiac action potential of a contractile cell.
Image B shows the conduction of electrical signals from the SA node through the cardiac muscle.

However, one of the features depicted in Image B is inaccurate. Identify the best option:

Answer

The
intercalated disks do not exist between the gap junctions of the cardiac muscle cells.

Answer

Unlike skeletal muscles, the
cardiac muscle cells should not be branched

Answer

The
membrane potential graph of the contractile cells is not correctly depicted in the given image

Answer

The
membrane potential graph of the autorhythmic cells should be similar
to the
membrane potential graph of the contractile cells

Answer

The electrical current should be depicted as traveling from the contractile cells back to the SA node, as the increased workload of the heart under anxiety requires a feedback mechanism.

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Anxious cricket fans may feel their hearts racing during tense moments—this ...

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