Concept explainers
To describe: Some advantages of an exoskeleton.
Introduction: Exoskeleton is a hard layer of protective material, around the outer epithelial covering of some animals. It may exist as a shell in some animals such as crabs and crustaceans. Exoskeletons are made of chitin or calcium carbonates which are very strong and hard materials that give strength to organisms and protect them from the environment. Animals having exoskeletons often do not have a backbone.
To describe: Some disadvantages of an exoskeleton.
Introduction: The hard layer of protective material, around the outer epithelial covering of some animals, is called its exoskeleton. It may exist as a shell in some animals such as crabs and crustaceans. Exoskeletons are made of chitin or calcium carbonates which are very strong and hard materials that give strength to organisms and protect them from the environment. Animals having exoskeletons often do not have a backbone.
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Biology (MindTap Course List)
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- What are the function of filament,hook and basal body?arrow_forwardA scientist extracts and measures the calcium content of one of your muscle fibers while you are asleep, when all of your muscles are relaxed. Where is the scientist likely to find calcium? In the T-tubules In the sarcoplasmic reticulum Bound to tropomyosin Bound to troponinarrow_forwardDescribe the advantages of an endoskeleton.arrow_forward
- Once the calcium binds, what happens next? The myosin binding sites become available so myosin binds to the actin and "kicks" causing the filaments to slide past each other. The ATP lets go from the actin and moves back into the high-energy position, ready to "kick" again. The troponin binds to the tropomyosin preventing a contraction. The ATP attaches to the myosin head causing it to "kick" and the Z-lines move closer together.arrow_forwardHow do museles (e.g biceps or quadnceps) get bigger with resistance training? Atrophy occurs Myopathy occurs Muscles cells grow Muscle cells divide Photoshop magicarrow_forwardA sarcomere contracts when a) Thin filaments (actin) slide b) Thick filaments (myosin) slide c) Thin filaments (actin) contract d) Thick filaments (myosin ) contractarrow_forward
- Do you think flexibility exercises work to make tendons or ligaments more flexible? Why would flexibility be so important to musculoskeletal health?arrow_forwardLimiting Weights is the exercise that stimulates muscles to become stronger. As muscles gain in…. Which of the following processes occurs at the cellular level? Mitochondria is added to aid in ATP production. More calcium is released with each action potential. Larger diameter myochorils are added to each cell.arrow_forwardCan you match the sacromere anatomy with the proper answer from the list below the table graph? Sarcomere Anatomy Description/Reaction Thin Filaments ? Thick Filaments ? A Band ? I Band ? M Line ? H Zone ? Z Disc ? A) G-Actin, F-Actin, Troponin, Tropomyosin B) Myosin C) Bisected by the M Line, this area shows only the thick filaments without any thin filamentous overlap D) The point of origin for myosin filaments found in the center of the sarcomere E) An area in the center of the sarcomere marked by the entire length of the thick filaments F) A space between sarcomeres with the z-disc in the center; this region shows Actin's anchorage points and extension without myosin overlap G) Anchoring point for the thin filamentsarrow_forward
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