Loss of islet beta cells is the pathologic abnormality most likely to be present in her pancreas at the time of her collapse.
<h3>What are islet beta cells?</h3>
The islets of Langerhans, which are cellular islands dispersed throughout the endocrine pancreas in most animals, include four main kinds of cells, the -cell being one of them. The beta-cell primarily produces and secretes the hormone insulin in reaction to glucose, while it can also do so in response to other foods, hormones, and nervous system stimulation. Adult rats have a sluggish mitotic rate in their -cells. Recent research offers fresh perspectives on the -cell's functioning. An major role for insulin/IGF-1 signaling in the control of -cell activity is suggested by the existence of functioning insulin, insulin receptors, and IGF-1 signaling pathway components. Glucokinase (GK) and ATP-dependent potassium channels have also recently been found on insulin secretory granules.
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Answer:
means that both the necessary mRNAs must persist and there must be a low level of RNA-degrading enzymes present
Explanation:
Mature red blood cells (also known as erythrocytes) don't contain nuclei. The red blood cells that enter the bloodstream eject their nuclei in order to have more space for transporting hemoglobin, a protein whose main function is to bind molecular oxygen. Erythrocytes have a life span period of three (3) to four (4) months. During this period, the mRNA of the hemoglobin genes must remain intact in order to synthesize hemoglobin proteins (i.e., their subunits). Moreover, in mature red blood cells, the levels of the enzymes involved in the degradation of cytoplasmic mRNA (ribonucleases) must also be low to avoid bulk mRNA degradation.
Answer:
The central idea of biological evolution is that all life on Earth shares a common ancestor, just as you and your cousins share a common grandmother.
1. Bt maize is a genetically modified maize. It is produced through biochemical techniques and with the use of biotechnology that allows genes of Bacillus thuringiensis bacteria to be introduced in the DNA of corn. These genes allow Bt maize plants to produce a toxic protein specific to certain groups of insects.
2. With the production of this protein, Bt corn becomes immune to attack by these insects. As a result, the use of pesticides in the corn crop is reduced, which makes production healthier and avoids side effects on the soil. In addition, it prevents the production of corn from falling due to the attack of insects.
3. Among the disadvantages, we can say that Bt maize does not control all the pests that attack maize, only a few, which allows maize to be attacked. It can also trigger evolution in pest species that are immune, creating a toxin-resistant species. Finally, it can create contamination in wild maize crops (that is, those that have not been genetically modified), ending diversity.
4. I believe that the use of Bt corn is favorable. This is because it allows a greater production of food to meet our need and increasingly intense demand for food. However, it is necessary to affirm that the use of this corn needs regulation and inspection, mainly in the big industries that can harm the small producer.