<span>By far the greatest impact of seedless vascular plants on human life, however, comes from their extinct progenitors. The tall club mosses, horsetails, and tree-like ferns that flourished in the swampy forests of the Carboniferous period gave rise to large deposits of coal throughout the world.</span>
Answer:
The correct answer is: Two of the statements above are correct.
A cardiac muscle cell contracts spontaneously and is joined to other cardiac muscle cells by structures called intercalated discs.
Explanation:
Cardiomyocytes, the only ones responsible for the contractile function of the myocardium, are terminally differentiated cells that cease to proliferate almost immediately after birth. Cardiomyocytes are mononucleated cells, with the nucleus in a central position. These are linked together by the so-called intercalary discs, which appear as dark bands in histological preparations, and which are a set of junction complexes where desmosomes and adherent junctions can be found (here called fascia adherens). The intercalary discs are therefore the boundaries between cells.
<span>Mitochondria are known as the powerhouses of the cell
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Answer:
Cushing's syndrome
Explanation:
Prolonged hypersecretion of glucocorticoid hormones by the adrenal gland causes a hormonal imbalance where the person begins to accumulate fat and lose bone and muscle mass.
Remember, one of the most important glucocorticoid hormone is cortisol, also known as the stress hormone, it usually helps us respond to conditions that are difficult for our body and where we need to use our strength and mental dexterity, when this hormone is elevate, we can respond to stress situations more easily. It helps us activate all the metabolism, as a result, we need to use more energy.
If cortisol remains elevated all day, despite not making physical and mental strength, our body will think it needs to eat, so people with this syndrome are always hungry, and accumulate fat. Thus leading to the appearance of the symptoms of the syndrome.
