A.
Tight junctions are <u>cell junctions in areas that are subjected to great mechanical stress, such as the skin and heart muscles</u>
Explanation:
They are also called <u>exclusion junctions</u>. This is because they form very tight junctions between adjacent cells such that only very small molecules, like ions, can pass in between the intercellular spaces of the cells. This is why they are found in regions where very little leakage is needed such as the heart -where blood could leak out during pumping- or the skin where foreign material cannot be allowed into the body.
They are also favorable in high stress regions because they bound cells together giving them structural integrity because they limit the movement of cells and their membrane intergral proteins.
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Answer:
Some tumors are benign, which means they form in only one spot without spreading to surrounding tissue. Malignant tumors are cancerous and can spread to nearby tissue. As cancerous tumors grow, cancer cells can break off and travel throughout the body, forming new tumors.
Explanation:
Medicare refers to a program for the individuals of and above the age of 65 with certain disabilities and diseases. Medicare the FFS scheme, that is, Fee-for-Service covers two parts, Part A and Part B.
Part A covers skilled nursing facility, hospital, hospice, and home health services. Part B covers professional services like those provided by a doctor. In the given case, Kelly is entitled to Part A, but not to Part B. Thus, in order to join a Medicare health plan, she also must enroll in Part B.
