3 Flashcards
What is galvanization? How is is typically done?
The process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc.
What is galvanism?
In biology, galvanism is the contraction of a muscle that is stimulated by an electric current. In physics and chemistry, it is the induction of electrical current from a chemical reaction, typically between two chemicals with differing electronegativities.
Does the zinc used during galvanization not erode?
It DOES erode, but it extends the life of the coated material.
Are pipes galvanized?
Around the early 20th century pipes were galvanized. It’s only around the 60’s and 70’s that we started standardizing using copper and plastic instead, since the galvanization started to wear off and chip off into the water. (This is why old outside water fountains often have discolored, metallic tasting water, though its NOT dangerous)
How thick are saturns rings? What are they made of?
Only about 30 feet. The rings are made of dusty ice, in the form of boulder-sized and smaller chunks that gently collide with each other as they orbit around Saturn.
What are the three types of muscle fibers?
Type 1 (Slow twitch oxidative) Type 2B (Fast twitch oxidative) Type 2B (Fast twitch glycolytic)
Which muscle fiber type has a higher density of mitochondria and capillaries?
Type 1
Which muscle fiber type is known for being redder and why?
Slow twitch is redder, as it has higher myoglobin content (provided by the mitochondrias and capillaries)
Fast twitch is whiter.
How does Muscle Fiber Type 1 generate ATP?
Oxidative phosphorylation. Slow twitch are made up of cells that excel at clearing waste and using oxygen to generate ATP.
How does Muscle Fiber Type 2b generate ATP?
Fast twitch (type 2b) uses glycolysis to generate ATP. Working off carb stores, the lactic acid system converts glucose to ATP.
How long is anaerobic glycolysis effective at providing energy?
10 seconds to 2 minutes
What is the energy potential of glucose, and what percentage of that can anaerobic glycolysis generate?
A molecule of glucose has an energy potential of 38 ATP molecules. AG can get 5%, or 2 molecules.
How much faster does Anaerobic Glycolysis produce ATP than Oxidative Phosphorylation?
Almost 100 times faster.
Which muscle fiber has the thickest diameter? The smallest?
Slow oxidative muscle fibers have the smallest diameter, fast oxidative fibers are intermediate in size, and fast glycolytic fibers are the largest
What is myoglobin? Which muscle type is it found in more often?
Myoglobin (symbol Mb or MB) is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. In humans, myoglobin is only found in the bloodstream after muscle injury (atrophy). Type 1 muscle, which is oxidative!
