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Are myocardial cells negative or positive in their resting state?
Wiki User
∙ 16y ago
negative at a resting value of -70mV
Wiki User
∙ 16y ago
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Is high ANA titer an indication of disease progression in rheumatoid arthritis?
The acronym ANA stands for anti-nuclear antibody. When your doctor suspects you may have an autoimmune disorder, he or she will test for the presence of anti-nuclear antibodies in your blood. To perform the ANA test, serum from your blood specimen is added to microscope slides which have commercially prepared cells on the slide surface. If your serum contains antinuclear antibodies (ANA), they bind to the cells (specifically the nuclei of the cells) on the slide. A second antibody, commercially tagged with a fluorescent dye, is added to the mix of patient's serum and commercially prepared cells on the slide. The second (fluorescent) antibody attaches to the serum antibodies and cells which have bound together. When viewed under an ultraviolet microscope, antinuclear antibodies appear as fluorescent cells. If fluorescent cells are observed, the ANA test is considered positive. If fluorescent cells are not observed, the ANA test is considered negative. The ANA titer is determined by repeating the positive test with serial dilutions until the test yields a negative result. The last dilution which yields a positive result (flourescence) is the titer which gets reported. For example, if a titer performed for a positive ANA test is: 1:10 positive 1:20 positive 1:40 positive 1:80 positive 1:160 positive 1:320 negative The reported titer would be 1:160. Generally, an ANA titre of 1:80 or higher is considered positive. At least 5% of the population has a positive ANA titre with no disease activity. For those with disease activity, the ANA titre does not indicate the absolute amount of disease activity (e.g. one person with an ANA titre of 1:640 may have very little disease activity, while another with a titre of 1:320 may have significant disease activity). The ANA titre must be evaluated in the context of the individual. The ANA test by itself is not specific for any disease. Your clinical presentation, as well as tests for additional antibodies, complements and factors in your blood will also be used to determine what condition, if any, is present, and how to treat it. Source(s): http://arthritis.about.com/od/diagnostic… webmd.com medhelp.org
Is a myocardial infarction a stroke?
A myocardial infarction is a heart attack. It is caused when the cells of the muscle of the heart do not get enough oxygen and glucose, resulting in anaerobic metabolism and buildup of products of that metabolism, resulting in cellular acidosis, shutdown of cellular metabolism, and finally cell death and necrosis. In the overwhelming number of casea, this process results from the blockage of a coronary artery by a thrombus formed when a cholesterol plaque ruptures, causing a clot to form. It can be caused by several other things, however. Severe dehydration, severe hypotension, partial blockage of an artery by a large plaque that has not ruptured and other low flow states can result in not enough oxygen and glucose getting to the cells. Also, anything that increases the metabolic demands on the heart muscle can cause similar effects - sepsis with shock, toxins, drugs, and poisonings.
How do tissues form your heart?
During embryonic development, part of the mesoderm breaks away and starts to form the heart. The embryonic stem cells differentiate primarily into myocardial cells, with the endoderm forming the endocardium and valves and the ectoderm forming the pericardium and pericardial sac. The exact steps aren't well known - embryology has more questions than answers for human development at this time.
What does depolarization of the heart mean?
It is a positive wave in the hearts muscle cells, the process of electrical discharge and the flow of electrical activity.
Why after dancing the heart rate stays fast for a long time?
In order to distribute oxygen to the muscle cells needed to dance, the blood must pump at an increased rate over the resting heart rate. At the end of exercise, there is still a defiency of oxygen and often anaerobic respiration (no oxygen present) takes place leaving lactic acid in the muscle cells. To return to baseline, the lactic acid must be removed by facilitating aerobic respiration (oxygen present).
Is the resting potential of a neuron 50-100 mV with the inside of the cell more negative than the outside?
It depends on what the sign is before your number. A positive sign in front of the number indicates that the inside of the cell is more positive when compared to the outside; a negative sign in front of the number indicates that the cell is more negative compared to the outside. The resting potential of a neuron is always negative when compared to the outside of the neuron, and usually lies around -90mV. For different cells in the body, the resting potential may vary but it will always be negative :)!
Are eukayotic cells from you gumline gram-positive or gram-negative?
Neither, only bacteria are classified as Gram positive or Gram negative.
What colors gram positive and gram negative bacteria?
Gram-positive cells are purple and the Gram-negative cells are red.
Are yeast cells gram positive or gram negative?
positive
What are cheek cells gram positive or gram negative?
They are gram positive
Do solar energy panels have positive and negative charges?
Yes, when the sun hits the cells inside the panels they have a positive and negative charge
Why will gram positive cells stain gram negative?
Contamination
Influx of Na plus till 70mV?
The electrical potential difference across a cell membrane (the resting potential) is around -65 mV, inside negative. In nerve cells (neurones) or muscle cells this potential difference is reversed during an action potential. Sodium (Na+) channels open and Na+ ions enter the cell down their concentration gradient. This entry of positive charge depolarises the membrane ie it cancels out the resting pootential and then reverses it, so the potential becomes positive inside and negative outside, giving a potential of about +50mV.
What describes when the myocardial cells recovers electrically?
repolarization
Positive and Negative affect of gamna rasdation?
The negative affects are nausea, vomiting and hair loss. The positive affects such as chemo therapy, which decreases or stops the cancer cells.
What layer is responsible for for anchoring the disk to the bony epiphysis?
resting cells anchor it.
Why are new cells sometime called resting cell in mitosis?
what part is seen in the resting cells that are missing in the cells that are dividing
