Explained ATI TEAS VII Online Practice A – Science questions and answers

What is the primary function of red blood cells in the human body? ️️ Red blood cells primarily transport oxygen from the lungs to body tissues and carry carbon dioxide back to the lungs. What organelle is responsible for producing ATP in eukaryotic cells? ️️ The mitochondrion is responsible for producing ATP through cellular respiration. What is the normal pH range of human blood? ️️ The normal pH range of human blood is approximately 7.35 to 7.45. Which macromolecule is the primary source of quick energy in the body? ️️ Carbohydrates are the primary source of quick energy in the body. What is the basic structural unit of all living organisms? ️️ The cell is the basic structural and functional unit of all living organisms. What type of bond forms when electrons are shared between atoms? ️️ A covalent bond forms when electrons are shared between atoms. What is the role of enzymes in biochemical reactions? ️️ Enzymes act as catalysts that speed up biochemical reactions without being consumed. What part of the brain controls balance and coordination? ️️ The cerebellum controls balance, coordination, and posture. What is the main function of the large intestine? ️️ The large intestine absorbs water and forms feces. What is homeostasis? ️️ Homeostasis is the maintenance of a stable internal environment in the body. What is the function of white blood cells? ️️ White blood cells defend the body against infection and disease. What is the basic unit of heredity? ️️ The gene is the basic unit of heredity. 2 What is the process by which plants make their own food? ️️ Photosynthesis is the process by which plants convert light energy into chemical energy. What is the main function of the kidneys? ️️ The kidneys filter blood and remove waste to produce urine. What is diffusion? ️️ Diffusion is the movement of molecules from an area of high concentration to low concentration. What is the role of DNA? ️️ DNA stores and transmits genetic information. What is the function of the ribosome? ️️ Ribosomes are responsible for protein synthesis. What is an element in chemistry? ️️ An element is a pure substance made of only one type of atom. What is the primary function of the respiratory system? ️️ The respiratory system facilitates gas exchange, bringing oxygen in and removing carbon dioxide. What is an ecosystem? ️️ An ecosystem is a community of living organisms interacting with their physical environment. What is the function of the heart? ️️ The heart pumps blood throughout the body. What is the role of the liver? ️️ The liver detoxifies chemicals, metabolizes drugs, and produces bile. What is an atom? ️️ An atom is the smallest unit of matter that retains the properties of an element. What is the function of the nervous system? ️️ The nervous system transmits signals and coordinates body activities. What is the function of platelets? ️️ Platelets help in blood clotting to prevent excessive bleeding. 3 What is osmosis? ️️ Osmosis is the movement of water across a semipermeable membrane from low solute concentration to high solute concentration. What is a hypothesis? ️️ A hypothesis is a testable prediction or explanation based on observations. What is the role of chlorophyll? ️️ Chlorophyll captures light energy for photosynthesis. What is the function of the skeletal system? ️️ The skeletal system supports the body, protects organs, and enables movement. What is an acid? ️️ An acid is a substance that donates hydrogen ions in solution. What is a base? ️️ A base is a substance that accepts hydrogen ions or produces hydroxide ions in solution. What is the function of the immune system? ️️ The immune system protects the body from pathogens and foreign substances. What is metabolism? ️️ Metabolism is the sum of all chemical reactions in the body. What is the function of the small intestine? ️️ The small intestine absorbs nutrients from digested food. What is a proton? ️️ A proton is a positively charged particle found in the nucleus of an atom. What is an isotope? ️️ Isotopes are atoms of the same element with different numbers of neutrons. What is the function of the endocrine system? ️️ The endocrine system produces hormones that regulate body processes. What is a population in biology? ️️ A population is a group of organisms of the same species living in a specific area. What is the function of the skin? ️️ The skin protects the body, regulates temperature, and prevents water loss. 4 What is the main function of carbohydrates in cells? ️️ Carbohydrates provide immediate energy for cellular activities. What is a solution in chemistry? ️️ A solution is a homogeneous mixture of two or more substances. What is the role of RNA? ️️ RNA carries genetic instructions from DNA to ribosomes for protein synthesis. What is the function of the alveoli? ️️ Alveoli are tiny air sacs in the lungs where gas exchange occurs. What is an organ system? ️️ An organ system is a group of organs working together to perform a specific function. What is natural selection? ️️ Natural selection is the process where organisms