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Cardiac muscle has what identifying characteristic? Striations Intercalated discs Multi-nucleated cells The colour A single nucleus per cell

Question

Cardiac muscle has what identifying characteristic?

  • Striations
  • Intercalated discs
  • Multi-nucleated cells
  • The colour
  • A single nucleus per cell
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Solution

Cardiac muscle, also known as myocardium, has several identifying characteristics:

  1. Striations: Like skeletal muscle, cardiac muscle is striated. This is due to the arrangement of the contractile proteins actin and myosin within the muscle cells.

  2. Intercalated discs: These are unique to cardiac muscle. They are specialized structures that allow for the rapid spread of electrical signals between cells, enabling the heart to contract as a unit.

  3. Single nucleus per cell: Unlike skeletal muscle, which is multi-nucleated, cardiac muscle cells typically have a single nucleus.

  4. The color of cardiac muscle is typically described as being a dark red color. This is due to the high levels of myoglobin, a protein that binds oxygen, in the cells.

So, the identifying characteristics of cardiac muscle are striations, intercalated discs, a single nucleus per cell, and its color.

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Muscle tissue that consists of cells that are striated, branched, and joined by intercalated discs is called muscle tissue.

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