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Among the vertebrates, mammals have the largest number of beta-cells in their
pancreas? Why is this so?
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- BIx₂x² Pancreas: The dark red cells are the exocrine cells that secrete pancreatic juice for digestion, while the lighter cells are the endocrine cells. What is the name of this cluster of endocrine cells?If all animals with a circulatory system have a "pump", then what can we say about the genes that code for the development of that structure? OThe genes are analogous. The genes are from aliens! O The genes are homologous. We can say nothing about these genes Question 44 (1 point) )Listen Which of the following is a function of saliva? [Select all that apply] OLubricate to ease swallowing.Insulin is a protein that allows sugar (glucose) to enter the body's cells (mainly liver, adipose tissue and skeletal muscle). This hormone plays a key role in the regulation of glucose levels in the blood ('hypoglycemic' effect). It is produced by the beta cells in the pancreas. A piece of the gene sequence that encodes for insulin contains: 5’ ATG-GCC-CTG-TGG-ATG-CGC-CTC-CTG-CCC-CTG-CTG-GCG-CTG-CTG-GCC-CTC-TGG-GGA-CCT-GAC- CCA-GCC-GCA-GCC-TTT-GTG-AAC-CAA-CAC-CTG-TGC-GGC-TCA-CAC-CTG-GTG-GAA-GCT-CTC-TAC-CTA-GTG-TGC-GGG-GAA-CGA-GGC-TTC-TTC-TAC-ACA-CCC-AAG-ACC-CGC-CGG-GAG-GCA-GAG-GAC-CTG-CAG-GTG-GGG-CAG-GTG-GAG-CTG-GGC-GGG-GGC-CCT-GGT-GCA-GGC-AGC-CTG-CAG-CCC-TTG-GCC-CTG-GAG-GGG-TCC-CTG-CAG-AAG-CGT-GGC-ATT-GTG-GAA-CAA-TGC-TGT-ACC-AGC-ATC-TGC-TCC-CTC-TAC-CAG-CTG-GAG-AAC-TAC-TGC-AAC-TAG 3’a. What is the complementary strand sequence?b. If the complementary strand is used during transcription, what is the base sequence of the resulting m-RNA?c. Based on the m-RNA sequence coding for human…
- In a floodplain or swampy environment would individuals with a mutation of a decreased ability to withstand temperature changes to an overall decrease in fatty tissue would be or less well adapted to their environment? why?You are studying growth factor GFA, which you know stimulates the proliferation of goblet cells in theintestine.Goblet cells are responsible for producing and secreting mucin, a mixture of glycosaminoglycans thatprotects the intestinal wall.Some patients suffering from inflammatory bowel disease (IBD) appear to have fewer goblet cells, thereforeless mucin and less protection from toxins and various other pro-inflammatory factors.These patients also have mutations in the gene encoding the GFA receptor (GFAR) in goblet cells,GFAR is a receptor tyrosine kinase (RTK) that autophosphorylates in response to GFA binding, thusbecoming active.QUESTION:explain what changes in GFAR could be caused by these IBD-associatedmutations and why.Malaria disease is characterized by cycles of symptoms with 3 stages; a cold stagewhen you shiver and feel very cold, a hot stage when your fever may reach as high as 41oC (104F) and finally, a sweating stage during which your fever drops rapidly. These cycles are called paroxysms. Explain why these body temperature phases typically happen in malaria patients
- Explain why E is the correct choice. Various types of stem cells that develop from the mesoderm are involved in processes by which all cells of the protostomes and Deuterostomes obtain or regulate ions, molecules, or monomers (nutrients). Therefore, these cells will perform which of the following processes? a) Osmosis, b) active transport, c) facilitated diffusion, d) exocytosis, e) all are correct.Researchers use a technique call RNA interference to knock down (i.e. not completely gone) the Bcl-2 gene in the amygdala of lab animals. What cellular response would you expect to occur? Question 1 options: A) An increase in apoptosis; many cells in the area would die B) An increase in axon regrowth after injury C) A decrease in cytochrome c levels released from the mitochondria D) A decrease in glial cell infiltration after injuryAPC is a tumor suppressor and acts in the Wnt signaling pathway to prevent the TCF complex from turning on Wnt-responsive genes. Mice that lack the gene encoding TCF4 do not have the ability to maintain the pool of proliferating gut stem cells needed to renew the gut lining. What do you predict will happen in mice that lack the APC gene?
- α-Bungarotoxin is a powerful neurotoxin found in the venom of a poisonous snake (Bungarus multicinctus). It binds with high specificity to the acetylcholine receptor (AChR; an integral membrane protein) andprevents its ion channel from opening. This interaction was used to purify AChR from the electric organ of torpedo fish.(a) Outline a strategy for using α-bungarotoxin covalently bound to chromatography beads to purify the AChR protein. (b) Outline a strategy for the use of [125I]α-bungarotoxin to purify the AChR protein.What is this? What special ability does it have? Does it have organelles to perform this activity?P450 scc (cholesterol esterase) is an enzyme found in the mitochondria (converts cholesterol to pregnenolone) of which of the following cells? (A) theca interna cells (B) follicular (granulosa) cells