Answer the following question given this paragraph: functionality of pepsin. Second, the stomach has a thick mucus lining that protects the underlying tissue from the action of the digestive juices. When this mucus lining is ruptured, ulcers can form in the stomach. Ulcers are open wounds in or on an organ caused by bacteria (Helicobacter pylori) when the mucus lining is ruptured and fails to reform. Small Intestine Chyme moves from the stomach to the small intestine. The small intestine is the organ where the digestion of protein, fats, and carbohydrates is completed. The small intestine is a long tube-like organ with a highly folded surface containing fingerlike projections called the villi. The apical surface of each villus has many microscopic projections called microvilli. These structures, illustrated in Figure 34.12, are lined with epithelial cells on the luminal side and allow for the nutrients to be absorbed from the digested food and absorbed into the blood stream on the other side. The villi and microvilli, with their many folds, increase the surface area of the intestine and increase absorption efficiency of the nutrients. Absorbed nutrients in the blood are carried into the hepatic portal vein, which leads to the liver. There, the liver regulates the distribution of nutrients to the rest of the body and removes toxic substances, including drugs, alcohol, and some pathogens. Q: Which organ has a thick mucus lining that protects the underlying tissue from the action of the digestive juices? Choices: - liver - colon - spleen - stomach A:
stomach
Answer the following question given this paragraph: all the life functions of an organism occur within cells,. Q: What basic structures are the site of all the life functions of an organism? Choices: - lipids - proteins - genes - cells A:
cells
Q: Answer the following question given this paragraph: Some traits are controlled by more than one gene. They are called polygenic traits. Each gene for a polygenic trait may have two or more alleles. The genes may be on the same or different chromosomes. Polygenic traits may have many possible phenotypes. Skin color and adult height are examples of polygenic traits in humans. Think about all the variation in the heights of adults you know. Normal adults may range from less than 5 feet tall to more than 7 feet tall. There are people at every gradation of height in between these extremes. Q: Polygenic traits are controlled by more than one of these? Choices: - phenotypes - chromosomes - genomes - genes A:
A: genes
Question: Answer the following question given this paragraph: Chemical reactions that take place inside living things are called biochemical reactions . Living things depend on biochemical reactions for more than just energy. Every function and structure of a living organism depends on thousands of biochemical reactions taking place in each cell. Q: What do you call chemical reactions that take place inside living things? Choices: - contaminated reactions - autonomous reactions - physical reactions - biochemical reactions A:
Answer: biochemical reactions
*Question*
Answer the following question given this paragraph: A molecule is any combination of two or more atoms. The oxygen in the air we breathe is two oxygen atoms connected by a chemical bond to form O 2 , or molecular oxygen. A carbon dioxide molecule is a combination of one carbon atom and two oxygen atoms, CO 2 . Because carbon dioxide includes two different elements, it is a compound as well as a molecule. Q: What term is used for any combination of two or more atoms? Choices: - element - synthesis - nucleus - molecule A:
**Answer**
molecule
(Q).
Answer the following question given this paragraph: Levels of organization, from the atom (smallest) to the organism (largest). Notice that organelles are inside a cell, and organs are inside an organism. Q: What is the largest level of organization? Choices: - organelle - genome - protein - organism A:
(A).
organism