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Explain process to Control of Breathing?
The rate of breathing is controlled by the medulla, the segment of brain stem just above the spinal cord. If the brain stem is cut just above the medulla, the basic breathing mechanism is left intact. The level of oxygen, or pO2 , provides little feedback information, but excessive carbon dioxide in the air causes breathing to become deeper and more rapid, even in the presence of excess oxygen. In extreme situations of oxygen depletion, chemosensors located on the large blood vessels leading to the heart, the aorta, and carotid arteries send impulses to the respiratory centers, causing an increase in respiratory rate.
Muscle cells have another oxygen-carrying molecule called myoglobin, which consists of only one polypeptide chain with an iron-containing structure that binds one molecule of oxygen. This molecule serves as a reserve for periods of high oxygen demand in certain muscles. The energy required for the body to maintain life processes while at rest is called the basal metabolic rate, or BMR.
Certain conditions such as excessive alcohol consumption can increase the ratio of NADH/NAD+ in the mitochondria. This will directly inhibit which of the following enzymes? -cit
Concerning their biological function what is the difference between mitosis and meiosis? The major biological function of mitosis is cellular multiplication, a fundamental proc
Which of the following processes assist in the maintenance of high levels of dissolved solutes in the interstitial spaces of the kidney medulla? A. Net flux of sodium ions from
Urine Collection: Untimed or random urine specimens are suitable only for few chemical tests (mainly qualitative test). Usually urine sample is collected over a predetermined
Meningocele In this the meninges protrude through the opening in the vertebrae generally in the lower back. The sac contains meninges and cerebrospinal fluid. The sac may
Q. What are the major representatives of the pteridophytes? Is this plant group phanerogamic or cryptogamic? The better known pteridophytes are the ferns and the maidenhairs, f
Indications for Surgery: In a mixed lesion, either regurgitation or stenosis may be dominant and decision of surgery depends on the haemodynarnics. At the time of surgery on othe
Q. If a fragment of nucleic acid has a nucleotide sequence TAC can one assert that it is an anticodon or a codon? A nucleic acid having a TAC sequence surely is not tRNA it is
Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 1.40 µC charge.
C o n t a g i o u s bovine pleuropneumonia It is a disease of bovines characterized by high rise of body temperature and difficulty in respiration. E t iolo
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