Why Can't Tetany of the Heart Occur

question 48

Multiple Choice

Why can't tetany of the heart occur?

• A) there are no distinct motor units in the heart.
• B) there is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction.
• C) the refractory period in cardiac muscle lasts almost as long as the duration of the resultant contraction.
• D) the heart contracts with maximal force every beat so it is impossible to increase the strength of cardiac contraction.
• E) vagal stimulation slows down the heart rate to prevent summation of contractions.

---

Definitions:

Coaxial

A type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield, often used for transmitting television signals and internet connections.

Coaxial

A type of cable with an inner conductor surrounded by a tubular insulating layer, used widely for transmitting television signals and internet connectivity.

Cable Medium

A type of physical transmission medium that uses cables, such as coaxial or fiber optics, to transmit data.

Broadcast Medium

Any medium used to transmit information, entertainment, or other messages to a wide audience, typically involving radio, television, or the internet.