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Showing posts from December, 2023

Male hypogonadism causes and symptoms (FULL REVIEW)

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Hypogonadism is a fascinating subject in the field of endocrinology. It is a disorder characterized by the body's inability to produce sufficient amounts of sex hormones and impairing the spermatogenesis process, leading to a variety of symptoms and complications. The causes of hypogonadism are as diverse as the condition itself, falling into two main categories: primary and central hypogonadism. Type Causes Primary Hypogonadism Genetic disorders (Klinefelter syndrome, Turner syndrome), Kidney and liver diseases, Exposure to radiation, Surgery on the sex organs, Autoimmune disorders (Addison's disease), Hemochromatosis Central Hypogonadism Genetic disorders (Kallmann syndrome), HIV and AIDS infections, Rapid weight loss, Nutritional deficiencies, Brain Surgery, Radiation Exposure, Tumor in or near the pituitary glands let's talk more... 1-Kallmann syndrome: This type of hypogonadotropic hypogonadism occurs due to a defect in the mi...

ALL Factors affecting the speed of enzymatic reactions

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There are many different methods for studying the mechanism of enzyme action. We can obtain Valuable information about their structure and functional pathways by determining the three-dimensional structure of enzymes. Researchers can gather information on each amino acid's functional and structural role with targeted mutagenesis for a specific locus. The primary method for studying enzymes, known as enzyme kinetics , involves determining the reaction rate and how it is affected by various environmental conditions. Factors affecting enzyme reaction rate Factors That Affect Enzyme Activity Factor Effect on Enzyme Activity Temperature Increases until a certain point, after which the protein is denatured, and the rate of the reaction dramatically decreases pH Changes in pH can cause changes in enzymes' secondary or tertiary structure, which can reduce their activity. The optimum pH range for most body enzymes is 5-9, while digestive enzymes are...

Important peptides in biology & biochemistry and their functions (Full List)

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Peptides are biological molecules that are formed by the connection of 2 to 50 amino acids. Peptides have a wide range of functions, including antiviral, antibacterial, antifungal, cytotoxic, antioxidant, and anticoagulant activities. Peptides are very important in terms of functional diversity. Additionally, peptides do not have the disadvantages of chemical drugs and can serve as a viable alternative. This post will examine several significant peptides' formation, structure, and introduction. Peptide Name Number of Amino Acids Physiological/Clinical Significance Angiotensins 7-10 Produced from angiotensinogen, angiotensin II is the most potent vasoconstrictor of the body and stimulates the release of aldosterone. Bradykinin 9 A vasodilator that causes smooth muscle relaxation and increased vascular permeability. Calcitonin 32 A hormone produced by the thyroid gland that regulates calcium levels in the blood. Cholecystokini...

what are two advantages of glycolysis?

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The main goal of the glycolysis pathway is to produce energy, and all body tissues can use the glycolysis pathway to produce energy. It is the main pathway for energy production in the brain and red blood cells. The unique feature of the glycolysis pathway is that it can produce energy in both aerobic and anaerobic conditions (Many biochemical pathways and cycles lack this feature). Some advantages of glycolysis are: It can produce ATP , the cell's primary energy currency, without needing oxygen. This is beneficial for cells that thrive in low-oxygen environments, like certain bacteria, or for cells that require a surge of energy when oxygen is limited, such as muscle cells during intense physical activity. It can produce NADH , a high-energy electron carrier, which can be utilized in other metabolic pathways, such as the Krebs cycle and oxidative phosphorylation, to generate additional ATP when oxygen is present. It can produce pyruvate, which can be conv...

Zinc function in our body (Complete review)

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Zinc is a vital and rare element essential for maintaining good health. In the following, we will explore the role of zinc in the human body. Zinc (Zn), with an atomic number of 30 and atomic mass of 25, is the second most crucial trace element in the body after iron. It is present in adults at a concentration of approximately 2 grams . Most of the body's zinc is concentrated in tissues and organs with high metabolic activity. About 55% of this mineral is found in muscle tissue, while nearly 30% is located in bones. The prostate, semen, and retina contain high levels of zinc. The zinc concentration in red blood cells is about ten times higher than in plasma, and most of this zinc is located within the cytoplasm in the form of carbonic anhydrase. Functions of zinc in our body Zinc plays a crucial role in cell growth, strengthening cell membranes, boosting the immune system (mainly neutrophils), promoting tissue repair, aiding blood clotting, and supporting vision. The ...

What are the symptoms of a B2 deficiency?

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Vitamin B2, also known as riboflavin, consists of an isoalloxazine ring connected to ribitol. Riboflavin is resistant to heat, but light can be broken down by light. This vitamin has two coenzyme forms: FMN (flavin mononucleotide) and FAD (flavin adenine dinucleotide) . FAD and FMN are involved in oxidation-reduction reactions and act as electron carriers. Enzymes that contain FAD or FMN are referred to as flavoproteins. Flavoproteins, such as alpha-amino acid oxidase, xanthine oxidase, succinate dehydrogenase, and dihydrolipoyl dehydrogenase, are enzymes involved in various biological processes. Yeast, liver, and kidney are rich in this vitamin. B2(Riboflavin) deficiency symptoms A deficiency of riboflavin can cause significant but nonfatal disorders in animals. Symptoms of vitamin B2 deficiency include sores at the corners of the mouth, tongue and light sensitivity. The diagnosis of riboflavin deficiency involves measuring the activity of the glutathione reductase enzyme...

what does high copper levels in blood mean?

High levels of copper in the blood may indicate copper toxicity. Genetic conditions, exposure to high levels of copper in food or water, or medical disorders can cause copper toxicity. Symptoms of copper toxicity include headaches, fever, fainting, nausea, vomiting, blood in vomit, diarrhea, dark stool, abdominal cramps, brown ring-shaped markings in the eyes (Kayser-Fleischer rings), yellowing of the eyes and skin (jaundice), mental and behavioral symptoms such as anxiety, irritability, difficulty concentrating, excessive excitement or overwhelm, unusual sadness or depression, and sudden mood changes. Long-term copper toxicity can be fatal and lead to kidney conditions, liver damage or failure, heart failure, and brain damage. The typical blood copper levels range from 70 to 140 mcg/dL. Your copper levels are higher than 140 mcg/dL; in that case, it may indicate exposure to excess copper or may be associated with conditions that decrease copper excretion, such as chronic liver ...

what causes high ceruloplasmin levels?

Estrogen leads to a significant stimulation of serum albumin synthesis. Therefore, there is a possibility of a moderate increase in the number of women using estrogen-containing medications, with even more significant increases seen during pregnancy. The use of drugs like carbamazepine, phenobarbital, and valproic acid can raise serum albumin levels. The synthesis of serum albumin slightly increases during the acute phase. This increase occurs gradually and reaches its peak within 2 to 20 days after an acute stimulus. Reference sciencecodons.com

What is the main cause of hypoalbuminemia?

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The term "albumin" (derived from the Latin word "albus" meaning white) is used to describe a white-colored deposit that forms when acidic urine is boiled. This deposit is primarily composed of albumin. Albumin is the most abundant protein in circulation, making up one to two-thirds of plasma proteins from the middle of the fetal period to the end of life. Hypoalbuminemia can occur for various reasons and through multiple mechanisms, including decreased synthesis, increased catabolism, loss, relocation, and blood dilution. Determining the level of plasma albumin is clinically significant in numerous cases. Cause Mechanism Liver disease Impaired synthesis of albumin Malnutrition Inadequate intake of protein or calories Inflammation Increased catabolism and redistribution of albumin Burns Loss of albumin through damaged skin Kidney disease Loss of albumin through urine 1-Impaired synthesis of albumin D...

viroid vs virusoid: review difference and similarities

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Viroids and virusoids are plant pathogens that, despite their similarities, have fundamental differences in g enetic material length , reproduction , transmission , and infection in their host. The genetic material of these pathogens consists of single-stranded, circular RNA. Viroidoids require the assistance of a virus to infect host cells and replicate. These pathogens enter plant cells through the capsid cover of the virus. Viroids have a larger genome size (200-400 nucleotides) compared to virosoids (80-400 nucleotides), and Viroids do not code for any proteins, while virosoids code for at least one protein. Viroids have a rod-like structure with terminal branches. The hammer-shaped head of these pathogens contains a ribozyme enzyme responsible for separating the multimeric RNA strands during replication. Viroids can replicate autonomously in the host cell, whereas virosoids depend on a helper virus for replication and encapsidation. Unlike viroids, virusoids replicate in t...

Is Chromium good for diabetics?

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Today is the time to talk about Chromium, which is very important for the function of insulin, and answer: Is Chromium good for diabetics? SHORT ANSWER : the function of insulin on the target organs like skeletal muscles and fat cells can be helped with Chromium. Also, Chromium makes complexes with proteins in your DNA. Chromium is a trace element found in certain foods and the environment. It is a vital nutrient because it affects insulin action. Some individuals use chromium supplements to control diabetes, manage weight gain, address metabolic syndrome, treat polycystic ovary syndrome (PCOS), and regulate blood cholesterol levels. Chromium is believed to improve insulin action and glucose metabolism in the body. The precise mechanism by which chromium functions in individuals with diabetes is not yet fully understood. Although it is believed to bind to an oligopeptide and form chromodulin, a low-molecular-weight substance that binds to and activates the insulin receptor, p...

Metabolism & Functions of copper in the body (Full review)

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The amount of copper (Cu, atomic number 29, atomic mass 62) present in the human body is approximately 90 milligrams. While about two-thirds of the body’s copper is found in the muscles and bones, the liver is a key organ in copper homeostasis. Copper metabolism Copper is found in high quantities in red meat and cereals, but it is present in lower amounts in chicken meat and legume products. The recommended daily intake of copper is approximately 1.6 milligrams. The absorption of copper in the digestive system ranges from approximately 20% for high intake (over 5 milligrams) to about 50% for low intake (less than 1 milligram). Various dietary components influence the absorption of copper in the digestive system. Zinc, molybdate, and iron can reduce copper absorption, while amino acids and sodium can increase it. (more information about copper absorption ) Absorbed copper, in the form of albumin, is transferred to the liver through the portal vein. It is then incorporated int...

Cytosol vs cytoplasm: Difference between cytosol and cytoplasm (Full review)

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Cytose and cytoplasm are related, but the two terms should not be used interchangeably. Cytosol is a component of the cytoplasm . Cytoplasm contains all the materials found in the cell membrane, including organelles, except mitochondria, chloroplasts, and vacuoles. Therefore, while these organelles are considered part of the cytoplasm, they are not part of the cytosol. In prokaryotic cells, cytoplasm and cytosol are the same. Cytosol is the clear, jelly-like fluid that fills the cytoplasm of a cell. It is composed of water, dissolved ions, and proteins. The cytosol is the site of many important cellular processes, including metabolism, protein synthesis, and cell signalling. Cytoplasm is the complete contents of a cell, excluding the nucleus. It consists of the cytosol and all of the organelles. The cytoplasm is where most of the cell's activities take place. let's talk more about cytoplasm and cytosol ... History When the term "cytosol" was coined by ...

what is the significance of cells that are permanently in g0 phase?

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The G0 phase is a resting phase in the cell cycle where cells are not actively dividing. Cells can enter the G0 phase from a cell cycle checkpoint in the G1 phase, typically in response to a deficiency of growth factors or nutrients. In this phase, the cell cycle machinery is dismantled, and cyclins and cyclin-dependent kinases disappear. Cells in the G0 phase, also known as quiescent cells, are biologically significant. The G0 phase is a stage in the cell cycle where cells temporarily or permanently stop dividing. Certain cell types in the body enter a non-dividing state known as G0, while the majority of cells continue to progress through the cell cycle. The significance of cells in the G0 phase can be observed in different contexts: 1-Tissue maintenance and repair : In adult organisms, specific cells, such as mature neurons, cardiac muscle cells, and skeletal muscle cells, mainly remain in the G0 phase. These cells have limited or no ability to divide. Their entry into G0 ...

What is the most common glycogen disorder?

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Glycogen is the main form of carbohydrate storage in animals, which is synthesized from excess glucose in almost all animal tissues. The liver and skeletal muscles are the primary source of glycogen storage. The liver stores excess glucose in the bloodstream as glycogen to compensate for this lack of sugar and energy by producing and releasing glucose into the bloodstream between meals and when blood glucose levels drop. The process of converting glucose to glycogen and converting glycogen to glucose occurs continuously in our body, which requires the help of special enzymes, which can cause mild to severe disorders if these enzymes malfunction. There are a series of glycogen-related diseases, which we call glycogen storage diseases, and they are classified into eight types. type1: Von Gierke disease The first common glycogen disorder is Von Gierke, a defect in the glucose 6-phosphatase enzyme. Imagine that glycogen is broken down into glucose 1-phosphate in the liver and m...

Metabolism of galactose

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Before talking about the METABOLISM OF GALACTOSE , let's briefly look at the metabolism of carbohydrates. Sugars [when in the intestine]are broken down into three main sugars. Becomes Glucose, galactose, and fructose. These three sugars are absorbed through active transport and facilitated diffusion. They enter the bloodstream and go to the liver. Fructose by facilitated diffusion, and Glucose and galactose by carrier. They are actively absorbed. Now, when they enter the liver, the liver can convert galactose and fructose into Glucose. Where is galactose metabolized? When galactose is absorbed, it goes to the liver through the bloodstream and is converted into Glucose in the liver. Glucose is quickly removed from the liver. In the bloodstream, the concentration of galactose is low. Reabsorption of galactose through the kidneys is very low or incomplete, so galactose comes to the liver and quickly leaves it, where it is converted to Glucose. A small amount remains as ga...

Metabolism of galactose

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Before talking about the METABOLISM OF GALACTOSE , let's briefly look at the metabolism of carbohydrates. Sugars [when in the intestine]are broken down into three main sugars. Becomes Glucose, galactose, and fructose. These three sugars are absorbed through active transport and facilitated diffusion. They enter the bloodstream and go to the liver. Fructose by facilitated diffusion, and Glucose and galactose by carrier. They are actively absorbed. Now, when they enter the liver, the liver can convert galactose and fructose into Glucose. Where is galactose metabolized? When galactose is absorbed, it goes to the liver through the bloodstream and is converted into Glucose in the liver. Glucose is quickly removed from the liver. In the bloodstream, the concentration of galactose is low. Reabsorption of galactose through the kidneys is very low or incomplete, so galactose comes to the liver and quickly leaves it, where it is converted to Glucose. A small amount remains as ga...

Fructose metabolism

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Regarding fructose metabolism, it can be mentioned that fructose is a sugar present in sucrose because it is composed of glucose and fructose and is present in some fruits and honey. Its entry into the cells is not a mediator of insulin, and its increase cannot cause an increase in insulin secretion. [caption id="attachment_1035" align="aligncenter" width="1024"] Fructose or fruit sugar in a glass jar. With fruit. Isolated.[/caption] Fructose can burn faster than glucose because the key enzyme bypasses phosphofructokinase. It means that it can take another path that this key enzyme is on its way, not so it can burn better than glucose. When fructose is burned in the liver, it can increase fatty acid synthesis and esterification of fatty acids. Increase: That is, fatty acids go to esterification pathways, and as a result, triglycerides can be produced at a high. It can also increase the secretion of VLDL from the liver and ultimately increase...