Answer: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
The most likely diagnosis following the above listed symptoms is hemorrhoids.
<h3>What are hemorrhoids?</h3>
Hemorrhoids is defined as a disease that occur due to inflammation of the vein at the rectum. The inflammation at the rectal region is due to:
- Straining during bowel movements.
- Sitting for long periods of time on the toilet and
- Having chronic diarrhea or constipation.
Therefore, the likely diagnosis is hemorrhoids.
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Answer:
hat causes an airway obstruction?
inhaling or swallowing a foreign object.
small object lodged in the nose or mouth.
allergic reaction.
trauma to the airway from an accident.
vocal cord problems.
breathing in a large amount of smoke from a fire.
viral infections.
bacterial infections.
Explanation:
