Respiration

• The respiratory system is responsible for the exchange of gases between an organism's body and its environment.
• Respiration releases energy for cells from glucose
• Respiration is a series of reactions in which energy is released from glucose
• Aerobic respiration needs oxygen, while anaerobic respiration does not
• Glucose and oxygen are used up in aerobic respiration
• Carbon dioxide and water are produced as waste products in aerobic respiration
• Most reactions of aerobic respiration happen inside mitochondria, tiny organelles inside the cytoplasm of the cell
• In aerobic respiration, there are 2 types of energy: useful and wasted
• Wasted energy, such as thermal or heat energy, is produced as a byproduct of aerobic respiration reactions
• Some organisms and tissues can continue to respire anaerobically if oxygen runs out
• Human muscle can respire anaerobically for short periods of time
• Glucose in yeast cells is converted to ethanol and carbon dioxide in anaerobic respiration
• Anaerobic respiration occurs only in the cytoplasm of cells
• Primary producers, also called autotrophs, can produce their own food and serve as food sources for animals farther up the food chain
• Primary producers are self-sufficient when it comes to meals: they produce their own food using light, carbon dioxide, water, and sometimes other chemicals
• Exceptions include chemosynthetic organisms that produce food without sunlight
• Biomass is organic and made of material that comes from living organisms, such as plants and animals
• Common biomass materials used for energy are plants, wood, and waste, known as biomass feedstocks
• Biomass energy can also be a non-renewable energy source
• Respiration releases energy for cells from glucose
• Respiration is a series of reactions in which energy is released from glucose
• Glucose and oxygen are used up in respiration
• Anaerobic respiration occurs only in the cytoplasm of cells