What are the primary characteristics of cardiac cells?

Cardiac muscle cells (cardiomyocytes) are striated, branched, contain many mitochondria, and are under involuntary control. Each myocyte contains a single, centrally located nucleus and is surrounded by a cell membrane known as the sarcolemma.

Which characteristic is unique to cardiac muscle cells?

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.

What are the characteristics of cardiac muscle cells quizlet?

  • Small cells with single nucleus.
  • Striated.
  • Involuntary.
  • Intercalated discs- allows for gaps in between cells to deliver messages.
  • Automaticity- has the ability to contract without neural stimulation.
  • Pacemaker cells- set the pace for cardiac muscle cell contraction.

What characteristics differentiates cardiac muscle cells?

While skeletal muscle consists of parallel linear fibers, the cardiac muscle cells (cardiomyocytes) are arranged in fibers exhibiting cross-striations formed by alternating segments of thick and thin protein filaments.

What was one unique characteristic about cardiac muscle?

One feature unique to cardiac muscle is the presence of intercalated discs. These were originally believed to be another type of striation or stripe. From studies of these bands with the electron microscope it can be seen that these discs represent the end-to-end junction of adjacent cardiac muscle cells.

Which of the following are characteristics of cardiac muscle?

Cardiac muscle tissues are cylindrical, branched and uninucleated (having single nucleus). They are involuntary and have striations.

What are the four properties of cardiac muscle?

The physiological properties of the cardiac muscle are: 1. Rhythmicity 2. Excitability 3. Contractility 4.
…
Property # 4. Conductivity (Dromotropism):
  • SA Node: …
  • Internodal Tracts: …
  • AV Node: …
  • Bundle of His: …
  • Purkinje Fibers/Ventricular Myocardium:

What characteristics allow you to distinguish cardiac muscle cells from skeletal muscle cells?

Like skeletal muscle, cardiac muscle is striated, but unlike skeletal muscle, cardiac muscle cannot be consciously controlled and is called involuntary muscle. It has one nucleus per cell, is branched, and is distinguished by the presence of intercalated disks.

What are the types of cardiac cells?

There are two major types of cardiac muscle cells: myocardial contractile cells and myocardial conducting cells. The myocardial contractile cells constitute the bulk (99 percent) of the cells in the atria and ventricles.

Which of the following are characteristics of the cardiac cycle quizlet?

Which of the following are characteristics of the cardiac cycle? It involves 1 complete contraction and relaxation of the atria and ventricles. When the atria contract, the ventricles relax. Exercise influences the cardiac cycle.

Is cardiac muscle Multinucleated?

Skeletal muscle cells are multinucleated from the fusion of muscle cells. Smooth muscle cells are strictly mononucleated, and cardiac muscle cells are mononucleated in humans. However, cardiac muscle cells are functionally syncytium.

Which of these is not a characteristic of cardiac muscle *?

Which of the following is NOT characteristic of cardiac muscle? Explanation: Skeletal muscle is the only muscle type that is multinucleated. Both cardiac and smooth muscle cells have only one nucleus.

Are cardiac muscle cells striated?

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

How do you distinguish between skeletal muscle and cardiac muscle?

Skeletal Muscles

Cardiac Muscles are found in the Heart and are involuntary muscles. Skeletal Muscles are attached to the bones and are voluntary in nature. Cardiac Muscles are only found in the heart wall of vertebrates. Skeletal Muscles can be found all over the body, attached with the help of Tendons.

What is the difference between cardiac muscle and skeletal muscle?

Skeletal muscle is voluntary and responds to conscious stimuli. The cells are striated and multinucleated appearing as long, unbranched cylinders. Cardiac muscle is involuntary and found only in the heart. Each cell is striated with a single nucleus and they attach to one another to form long fibers.

How many nuclei are in a cardiac muscle cell?

one nucleus
Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks.

What are the four properties of cardiac muscle?

The physiological properties of the cardiac muscle are: 1. Rhythmicity 2. Excitability 3. Contractility 4.
…
Property # 4. Conductivity (Dromotropism):
  • SA Node: …
  • Internodal Tracts: …
  • AV Node: …
  • Bundle of His: …
  • Purkinje Fibers/Ventricular Myocardium:

How are cardiac muscles different from other muscles?

One other distinct feature of cardiac muscle fibers is that they have their own auto rhythmicity. Unlike smooth or skeletal muscle which require neural input for contraction, cardiac fibers have their own pacemaker cells like the sinoatrial (SA) node that spontaneously depolarizes.