Answer the following question given this paragraph: Variation in muscle cells gives further insight into some benefits of anaerobic respiration. In vertebrate muscles, lactic acid fermentation allows muscles to produce ATP quickly during short bursts of strenuous activity. Muscle cells specialized for this type of activity show differences in structure as well as chemistry. Red muscle fibers are "dark" because they have a rich blood supply for a steady supply of oxygen, and a protein, myoglobin, which holds extra oxygen. They also contain more mitochondria, the organelle in which the Krebs cycle and electron transport chain conclude aerobic respiration. This is endurance muscle. White muscle cells are "light" because they lack the rich blood supply, have fewer mitochondria, and store the carbohydrate glycogen rather than oxygen. This is muscle built for sprinting. Q: Variation in muscle cells gives further insight into some benefits of what type of respiration? Choices: - natural - enzymatic - aerobic - anaerobic A:
anaerobic
Answer the following question given this paragraph: Mechanical weathering breaks rock into smaller pieces. These smaller pieces are just like the bigger rock; they're just smaller! The rock has broken without changing its composition. The smaller pieces have the same minerals in the same proportions. You could use the expression "a chip off the old block" to describe mechanical weathering! The main agents of mechanical weathering are water, ice, and wind. Q: What type of weathering breaks rock into smaller pieces? Choices: - fluid weathering - chemical erosion - chemical weathering - mechanical weathering A:
mechanical weathering
Q: Answer the following question given this paragraph: An antibody matches only one type of antigen. Q: How many types of antigens can an antibody match? Choices: - two - four - infinite - one A:
A: one
Question: Answer the following question given this paragraph: Q: What do cells secrete that binds to receptors? Choices: - stress - endorphans - proteins - factor A:
Answer: factor
*Question*
Answer the following question given this paragraph: Most prokaryotes get both energy and carbon from other living things. Many of them are decomposers. They break down wastes and remains of dead organisms. In this way, they help to recycle carbon and nitrogen through ecosystems. Q: By breaking down wastes and remains of dead organisms, decomposers perform what function in an ecosystem? Choices: - reproduction - symbiosis - collecting - recycling A:
**Answer**
recycling
(Question)
Answer the following question given this paragraph: whereas atherosclerosis is a more specific term for the build-up of plaque in the walls of the vessel and is a specific type of arteriosclerosis. There is also a distinct genetic component, and pre-existing hypertension and/or diabetes also greatly increase the risk. However, obesity, poor nutrition, lack of physical activity, and tobacco use all are major risk factors. Treatment includes lifestyle changes, such as weight loss, smoking cessation, regular exercise, and adoption of a diet low in sodium and saturated fats. Medications to reduce cholesterol and blood pressure may be prescribed. For blocked coronary arteries, surgery is warranted. In angioplasty, a catheter is inserted into the vessel at the point of narrowing, and a second catheter with a balloon-like tip is inflated to widen the opening. To prevent subsequent collapse of the vessel, a small mesh tube called a stent is often inserted. In an endarterectomy, plaque is surgically removed from the walls of a vessel. This operation is typically performed on the carotid arteries of the neck, which are a prime source of oxygenated blood for the brain. In a coronary bypass procedure, a non-vital superficial vessel from another part of the body (often the great saphenous vein) or a synthetic vessel is inserted to create a path around the blocked area of a coronary artery. Q: Plaque is surgically removed from the walls of a vessel in which surgery? Choices: - discectomy - lumpectomy - arthroscopy - endarterectomy A:
(Answer)
endarterectomy