Digestive System

Ameoba extends pseudopodia around the food particle until they join, enclosing the particle in a membrane-bound vesicle. A lysosome merges with the new food vacuole, dumping its enzymes in to digest the food. The products of digestion are then absorbed through the membrane.

No, digestive enzymes are not necessary for mechanical digestion. Mechanical digestion involves the physical breakdown of food into smaller pieces through actions like chewing and churning, while digestive enzymes are responsible for breaking down food chemically into nutrients that can be absorbed by the body during the process of chemical digestion.

Digestive enzymes actually help speed up the digestion process by breaking down proteins, carbohydrates, and fats into smaller molecules that can be absorbed by the body more easily. They work in coordination with the body's natural digestive processes to enhance overall digestion and absorption of nutrients.

Digestive juices do contain water, but the exact amount can vary. For example, saliva is about 99% water, while gastric juice is composed of around 98% water. In general, water plays a crucial role in helping to break down food and facilitate the digestive process.

The five main organs in the digestive system are the mouth, esophagus, stomach, small intestine, and large intestine. These organs work together to break down food, absorb nutrients, and eliminate waste from the body.

Some viruses can survive passage through the gastrointestinal tract due to their ability to resist stomach acid and bile salts. However, many viruses are not able to survive this harsh environment and are inactivated before they can infect cells in the intestines.

pepsin is an enzyme in the stomach specific to proteins sucrose is a di-sacaride ie sugar not a protein common this is easy stuff think about it each substrate has a specific enzyme this is extremely basic stuff don't consider a career in biochemistry buddy

Pepsin works best at 37 C because that is it's optimal temperature. The temperature at which it works best. Every enzyme has one which is based on the molecular geometry and binding of the protein...

A physical change that occurs during digestion is the mechanical breakdown of food into smaller pieces through chewing and churning in the stomach. A chemical change that takes place is the breakdown of macromolecules like proteins, carbohydrates, and fats into simpler molecules like amino acids, glucose, and fatty acids through the action of enzymes.

Food is chewed and moistened in the mouth, where it mixes with saliva to begin the process of breaking down carbohydrates. The teeth help mechanically break down food into smaller pieces, while enzymes in the saliva start to chemically digest starches.

Metabolizing food is a chemical change because it converts food into energy.

Most people might think the stomach was the main digestive system organ, but I'm inclined to think the intestines are the most critical component. People can have surgeries to shrink their stomach size to very small, but the intestines are where nutrients pass to the blood stream.

The liver and pancreas are two important organs that lie outside the digestive tube but play crucial roles in the digestive process. The liver produces bile, which helps emulsify fats for better digestion and absorption. The pancreas secretes digestive enzymes into the small intestine to break down carbohydrates, proteins, and fats.

True. Bile salts help emulsify fats by breaking down large fat globules into smaller fat droplets, which increases the surface area for enzymes to digest fats more efficiently.

The organ in the digestive system where the chemical breakdown of food primarily occurs is the stomach. Here, gastric acids and enzymes break down food into smaller particles for further digestion and absorption in the intestines.

A planarian is a non parasitic flatworm commonly found in ponds and rivers. Digestive enzymes are secreted from their mouth, then the pharynx moves the food to the gastrovascular cavity, where nutrients diffuse to the rest of the body.

When swallowed, food is referred to as a bolus. This is a mass of chewed food mixed with saliva that travels down the esophagus to the stomach for further digestion.

Barium sulfate is used in X-ray imaging of the gastrointestinal system because it is radio-opaque, meaning it shows up clearly on X-ray images. When a patient ingests a barium sulfate suspension, it coats the inside of the digestive tract, allowing the radiologist to visualize the structures of the stomach and intestines more clearly during imaging procedures.

No, you need taste buds, not saliva to taste food.

The absorption of amino acids, simple sugars (such as glucose), vitamins and minerals involves active transport processes. in contrast, the products of fat (fatty acids) digestion are lipid-soluble molecules and are able to diffuse easily through the membranes of the intestinal cells.

The stomach secretes hydrochloric acid. The acid is produced by special cells called parietal or oxyntic cells. The pH of stomach acid is between 1 - 2. For more details see: http://en.wikipedia.org/wiki/Gastric_acid

Which one of the following correctly represents the order in which food coming into the body passes through the structures of the digestive system?

Food moves from the mouth to the pharynx, then on to the esophagus, the stomach, the small intestine, and finally the large intestine.

Vasocontriction throughout the intestinal tract during sympathetic discharge helps redistribute the blood and makes it easier for the heart to maintain higher diastolic blood pressure. This increases blood flow to major muscle groups and in turn permits increased oxygenation and energy utilisation, both of which are necessary during situations where physical exertion may have a (perceived) survival benefit.

Bacteria in mutualistic relationships with plants can provide essential nutrients, such as nitrogen, by fixing atmospheric nitrogen into a usable form for the plants. This helps the plants with their growth and development, especially in nutrient-poor soils.

The act of digestion consists of hundreds of separate decomposition reactions. Digestion occurs in the mouth as soon as you eat something. The enzyme amylase begins to decompose proteins by breaking the peptide bonds that hold them together. Complex carbohydrates are also broken down into simpler sugars which the body can burn for energy right away. These processes continue in the stomach and small intestines as well with different chemicals, like the enzymes pepsin and peptidase, which are specific to those organs. Generally speaking, proteins are broken down into amino acids, and polysaccharides, with their glycocemic bonds, are broken down into glucose. Unsaturated fats can be broken down as well, but saturated fats, with their long carbon chains, are very difficult to break down, which is why they are stored as fat.