To determine:
The phenomenon that describes control illustration of, when a person eats a fatty diet, excess cholesterol accumulates in the bloodstream. Cells then temporarily stop producing cholesterol.
Introduction:
The release of chemicals, both in surplus or deficit amount, in the human body is precisely controlled by their respective cells and the cholesterol, being biosynthesized by all animal cells, is not an exception. Cholesterol could also be taken-in with food intake and if consumed in the surplus amount, would lead to the blockage in its production from the cells. This biological process of temporary inhibition of cholesterol synthesis in the liver is known as ‘Negative Feedback’ or ‘Feedback Inhibition’.
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Biology: Concepts and Investigations
- A new energy drink in stores contains no sugar, carbs or fat. It does, however, contain relatively high concentrations of B-vitamins (B-3, B-5, B-6, and B-12) which our digestive system does not break down. If our useable energy (ATP) is supplied by cellular respiration, where would the energy this products claims to provide come from?arrow_forwardWhy is it important that glucose be converted to glucose-6-phosphate once glucose enters a cell? Select one: a. This form is easier for cells to metabolize. b. The cells can easily excrete this molecule. c. Glucose can't diffuse out of the cell if it is in this form. d. It can now cross the plasma membrane. e. It becomes a long-term storage molecule for glucose.arrow_forwardOne condition is ketoacidosis (low blood pH) which is a potentially life-threatening state, most commonly experienced by diabetics. Ketoacidosis, however, is not typically an issue for healthy people who are following a ketogenic diet. What is the difference between ketoacidosis and ketosis? Why do diabetics sometimes develop ketoacidosis, while healthy people rarely do? Healthy people are well equipped to survive on a ketogenic diet. Why is it important that humans evolved to have the ability to survive without carbohydrate nutrients?arrow_forward
- When young rats are placed on a completely fat-free diet, they grow poorly, develop a scaly dermatitis, lose hair, and soon die. These symptoms can be prevented if linoleate or plant material is included in the diet. What makes linoleate an essential fatty acid? Animals lack the enzymes required to synthesize long-chain fatty acids with 14 or more carbons. Animals lack the enzymes required to synthesize odd-number fatty acids. Animals lack the enzymes required to synthesize polyunsaturated fatty acids. Animals lack the enzymes required to introduce double bonds into fatty acids beyond the A9 position.arrow_forwardThe stomach has two types of exocrine cells: the chief cells, which secrete an inactive form of the protein-digesting enzyme pepsinogen, and the parietal cells, which secrete hydrochloric acid (HCl) that activates pepsinogen. Both cell types have an abundance of mitochondria for ATP production- the chief cells need energy to synthesize pepsinogen, and the parietal cells need energy to transport hydrogen ions. (H+) and chloride ions (Cl-) from the blood into the stomach lumen. Only one of these cell types has an extensive rough endoplasmic reticulum and abundant Golgi stacks. Would this be the chief cells or the parietal cell? parietal cells.arrow_forwardHow does the serum cholesterol level control both cholesterol synthesis in the liver and LDL uptake? When serum cholesterol concentration is low, the synthesis of cholesterol in the liver is inhibited, and the synthesis of cell receptors is increased. Serum cholesterol level controls the formation of cholesterol in the liver by regulating proteins that synthesize cholesterol. O When serum cholesterol concentration is high, the synthesis of cholesterol in the liver is inhibited, and the synthesis of cell receptors is increased. Serum cholesterol level controls the formation of cholesterol in the liver by regulating enzymes that synthesize cholesterol. When serum cholesterol concentration is high, the synthesis of cholesterol in the liver is inhibited, and the synthesis of cell receptors is decreased. Serum cholesterol level controls the formation of cholesterol in the liver by regulating proteins that synthesize cholesterol. When serum cholesterol concentration is high, the synthesis of…arrow_forward
- Bile Salts are: a. a mixture of amphipathic molecules which emulsify fatty acids in the small intestine b. enzymes present in saliva that digest proteins into amino acids c. made by the liver and secreted from the gall bladder into the duodenum d. enzymes that digest “dietary fiber” (cellulose) in the esophagus e. enzymes present in saliva that make bread taste sweet after chewingarrow_forwardOne role of the pancreas is to help regulate blood glucose levels. Two types of cells in the pancreas, beta and alpha, serve as sensors to detect changes in blood glucose levels. High glucose levels cause beta cells to increase the amount of insulin given off by the pancreas. The insulin triggers body cells to take in glucose and the liver to store excess glucose as glycogen, decreasing the blood glucose level. On the other hand, low glucose blood levels trigger alpha cells to signal for glycogen to free up stored glucose from your liver, thus increasing the blood glucose level. (4 points) 1. What type of feedback mechanism is this, positive or negative? Explain your answer based on the description of the mechanism. Blood glucose levels change throughout the day. Explain what causes these changes and describe how these feedback cycles work together to maintain a dynamic homeostasis. III. Predict what will happen to this feedback mechanism and then to a person's body if the beta cells…arrow_forwardThe stomach has two types of exocrine cells, chief cell which secrete an inactive form of the protein degesting enzymes pepsinogen, and parietal cells , which secrete hydrochloric acid that activates pepsinogen.Both cell types have an abundance of mitochondria ATP production.The chief cells need energy to synthesise pepsinogen and parietal cells need energy to transport hydrogen ions and chloride ions from the blood into the stomach lumen.Only one of this cell types has an extensive roung endoplasmic and abandant Golgi stacks. Would this be the chief cells or parietal cells?why?arrow_forward
- High blood-cholesterol levels are dangerous because of their correlation with atherosclerosis and consequent heart attacks and strokes. Is it possible to eliminate all cholesterol from the bloodstream by having a diet that includes no cholesterol? Is it desirable to have no cholesterol at all in your body? Explain your answer.arrow_forwardWasting is one of the characteristics of HIV / Aids, caused by increased metabolic activity. Untreated patients quickly lose up to 10% of their body weight, with loss of muscle mass contributing most. What happens to the amino group of amino acids that are broken down in the muscles? Fully explain the process of amino acid degradation in the muscle up to urea production in the liver.arrow_forwardFatty acids are stored in adipose tissue, as triacylglycerol (TAG) forms. TAGs are degraded as glycerol and fatty acids where energy is required. Based on that knowledge explain: How these products are used in the adipose, liver, and other tissue? Why glycerol can not be metabolized in adipose tissue?arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education