Answer: Cell with membrane potential have EXCITABILITY, thus, the correct option is C.
Explanation:
Membrane potential refers to the difference in electric potentials between the inside and the outside of the cell membranes of living organisms. This difference in electric potential give the cell membranes the ability to receive and to respond to stimuli, this ability is called excitability.
The central nervous system is responsible for processing stimuli information and sending out appropriate responses to different parts of the body including the muscles. The muscles tissues are able to respond to the directions of the nervous system to contract or to relax because of their ability to be excited due to the potential differences between the outer and the inner plasma membrane.
The event that occurs during meiosis I is that homologous chromosomes separate.
What is meiosis?
Meiosis is a kind of cell division where a diploid cell divides into four haploid cells, which develop to produce gametes.
Meiosis is the process of gamete formation made up of two series of successive divisions namely;
Meiosis I
Meiosis II
In meiosis I, the homologous chromosomes separate into two sister chromatids. Homologous chromosomes are two similar but non-identical chromosomes formed from both parents.
Therefore, the event that occurs during meiosis I is that homologous chromosomes separate.
Learn more about homologous chromosomes at:
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Answer:
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Answer:
The fewer number of T cells a person has, the more chances to be affected by an opportunistic infection. When the number of T cells reaches 200 cells/µl, the person is at risk of being infected by other infections.
Explanation:
The whole immune system of a person who is infected with HIV infection seems to be severely affected. When the person is not treated or the disease is in a very advanced stage, the depletion of the T- cells turns to be very sharped, especially CD4+ T cells. At this point, the immune system can not resist the attack of other microorganisms. The <em>lower is the number of CD4+ T Cells, the higher possibility the person has to be attacked by opportunistic infections. </em>
Classically, it has been suggested that opportunistic infections appear after the CD4 + T lymphocytes reach very low levels, such as 200 cells/µl. The number of circulating T cells can be used as an indicator and a measure of global "immune competence", and the previously mentioned amount of CD4 + T cells is an accepted universal reference used to predict the risk of having one of these opportunistic infections.
<span>The pleura serous membrane is found lining the thoracic cavity and the lungs. The pleura membrane is folded and creates a sac around the filled with pleural fluid. the pleural fluid is created and reabsorbed continuously. There are two pleura serous membranes, one for the left lung and the other for the right lung.</span>
