What are the histological characteristics of cardiac muscle cells quizlet?

The muscle tissue of the heart Cardiac muscle is striated, uninucleate, and under involuntary control (controlled by teh autonomic nervous system). Note also that cardiac muscle is self-stimulatory, and autonomic control serves only to modify the intrinsic rate of contraction.

Which are the characteristics of cardiac muscle cells?

Cardiac muscle cells are found only in the heart, and are specialized to pump blood powerfully and efficiently throughout our entire lifetime. Four characteristics define cardiac muscle tissue cells: they are involuntary and intrinsically controlled, striated, branched, and single nucleated.

What are characteristics of cardiac muscle cells quizlet?

Terms in this set (15)

  • Single nucleus per cell.
  • Branched (intercalated disks)
  • Cross striations (sarcomeres)
  • Rhythmic contractions to pump blood.
  • Involuntary movement.

What is the histology of cardiac muscle?

Cardiac muscle is striated, like skeletal muscle, as the actin and myosin are arranged in sarcomeres, just as in skeletal muscle. However, cardiac muscle is involuntary. Cardiac muscle cells usually have a single (central) nucleus. The cells are often branched, and are tightly connected by specialised junctions.

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What characteristic is unique to cardiac muscle?

Unique to the cardiac muscle are a branching morphology and the presence of intercalated discs found between muscle fibers. The intercalated discs stain darkly and are oriented at right angles to the muscle fibers. They are often seen as zigzagging bands cutting across the muscle fibers.

What are the two types of cardiac muscle cells?

Structure. There are two types of cells within the heart: the cardiomyocytes and the cardiac pacemaker cells. Cardiomyocytes make up the atria (the chambers in which blood enters the heart) and the ventricles (the chambers where blood is collected and pumped out of the heart).

What is the structure and function of the cardiac muscle?

Cardiac muscle tissue is a specialized, organized type of tissue that only exists in the heart. It is responsible for keeping the heart pumping and blood circulating around the body. Cardiac muscle tissue, or myocardium, contains cells that expand and contract in response to electrical impulses from the nervous system.

Where is cardiac muscle found?

Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control.

Why can’t a cardiac muscle cell develop tetanic contractions quizlet?

Why does cardiac muscle not have a temporal summation of tension and eventual tetanic contractions due to increase in frequency of stimulation? Because cardiac muscle cannot produce a second action potential until its contraction is nearly complete and because of the relatively slow rise in tension of cardiac muscle.

What are the characteristics of smooth muscle quizlet?

Terms in this set (25)

  • Single nucleus per cell.
  • No branches.
  • No cross striations (no sarcomeres)
  • Slow, rhythmic, prolonged contractions of visceral organs.
  • Involuntary movement.
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What shape is the cardiac muscle?

Cardiac muscle cells

Cardiomyocytes are short and narrow, and fairly rectangular in shape.

What is the specific function of cardiac muscle?

Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells. These control the contractions of your heart.

What are the 6 Muscle rules?

Terms in this set (6)

  • Rule #1. Muscles have two+ attachments and must cross at least one joint.
  • Rule #2. Muscles “pull” and get shorter.
  • Rule #3. attachment that moves is the insertion. …
  • Rule #4. Muscles that decrease angle between ventral surfaces are flexors. …
  • Rule #5. Muscles work in opposing pairs.
  • Rule #6.

What are the 3 muscle types?

The three main types of muscle include:

  • Skeletal muscle – the specialised tissue that is attached to bones and allows movement. …
  • Smooth muscle – located in various internal structures including the digestive tract, uterus and blood vessels such as arteries. …
  • Cardiac muscle – the muscle specific to the heart.

Why are striations present in heart muscle?

Why are striations present in heart muscle? The cardiac muscle had light and dark areas along the cells giving them a striped appearance. They are present because the myosin filaments of the muscle create the dark areas where as the the smaller actin filaments create the lighter areas.

Cardiac cycle