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There are two primary kinds of cells in the heart muscle These cells are the myocardial and electrical cells?
Myocardial cells lines the muscular walls of heart tissues (contractility and extensibility) Electrical cells is the conduction system of the heart. Can be conducted 3 ways: automaticity that generates action potential, excitability that responds to electrical impulses and conductivity transmit an electrical impulses from one cell to the next
What is a correct statement about the function of myocardial cells?
Myocardial cells are responsible for generating and conducting electrical impulses that regulate the heart's rhythm and contraction. They work together to ensure coordinated and efficient pumping of blood throughout the body. Additionally, myocardial cells have a high demand for oxygen and nutrients to maintain their contractile function.
Which term describes the structure directly below tissues in the hierarchical organization of life?
The term that describes the structure directly below tissues in the hierarchical organization of life is cells. Cells are the building blocks of tissues and are organized into tissues that perform specific functions within an organism.
Reproductive cells have 23 chromosomes. Which term describes this structure?
Haploid
What term describes the condition of plant cells after being placed in distilled water?
Plasmolysis describes the condition of plant cells after being placed in distilled water. In plasmolysis, water exits the cell by osmosis, causing the cell membrane to detach from the cell wall. This results in the cell shrinking and the cytoplasm pulling away from the cell wall.
What is myocardial fibrosis?
Myocardial fibrosis is the abnormal thickening of the heart valves. This thickening is caused by the muscles in the hearts cells becoming impaired.
What vessels carry oxygen to myocardial cells?
The circulatory system and heart are vessels that carry oxygen to myocardial cells. They help send blood throughout the entire body each time a person's heart beats.
Which structure is responsible for keeping the myocardial cells together during contraction?
desmosomes
The electrical synapses between adjacent myocardial cells are called?
gap junctions
When the heart's workload increases what changes occur in the myocardial cells?
hypertrophy occurs.
What vessels that carry oxygen to the myocardial cells are called?
The vessels that carry oxygen to the myocardial cells are called coronary arteries. These arteries supply the heart muscle with oxygen-rich blood to support its function.
There are two primary kinds of cells in the heart muscle These cells are the myocardial and electrical cells?
Myocardial cells lines the muscular walls of heart tissues (contractility and extensibility) Electrical cells is the conduction system of the heart. Can be conducted 3 ways: automaticity that generates action potential, excitability that responds to electrical impulses and conductivity transmit an electrical impulses from one cell to the next
Are myocardial cells negative or positive in their resting state?
negative at a resting value of -70mV
A patient has an 80 percent blockage of his left anterior descending coronary artery Describe what occurs in terms of myocardial oxygen supply and demand if his sympathetic nervous system is stimulate?
Increased myocardial contractility increases the oxygen demand for the myocardial cells. If the demand of oxygen exceeds the supply, death of myocardial tissue can occur.
Myocardial cells can generate action potentials spontaneously because they have?
Myocardial cells can generate action potentials spontaneously due to the presence of funny (If) channels that allow for a slow influx of sodium ions, as well as T-type calcium channels that contribute to the depolarization phase of the action potential. These channels, coupled with the unique organization of ion channels in the myocardial cell membrane, enable automaticity in these cells.
What is the Electrical synapse between adjacent myocardial cells are called?
Gap junction
What are the two cell populations in the body that do not undergo cell division?
Neurones in the CNS and cardiac/myocardial cells.
