<span>There are numerous proteins in muscle. The main two are thin actin filaments and thick myosin filaments. Thin filaments form a scaffold that thick filaments crawl up. There are many regulatory proteins such as troponin I, troponin C, and tropomyosin. There are also proteins that stabilize the cells and anchor the filaments to other cellular structures. A prime example of this is dystrophin. This protein is thought to stabilize the cell membrane during contraction and prevent it from breaking. Those who lack completely lack dystrophin have a disorder known as Duchene muscular dystrophy. This disease is characterized by muscle wasting begininng in at a young age and usually results in death by the mid 20s. The sarcomere is the repeating unit of skeletal muscle.
Muscle cells contract by interactions of myosin heads on thick filament with actin monomers on thin filament. The myosin heads bind tightly to actin monomers until ATP binds to the myosin. This causes the release of the myosin head, which subsequently swings foward and associates with an actin monomer further up the thin filament. Hydrolysis and of ATP and the release of ADP and a phosphate allows the mysosin head to pull the thick filament up the thin filament. There are roughly 500 myosin heads on each thick filament and when they repeatedly move up the thin filament, the muscle contracts. There are many regulatory proteins of this contraction. For example, troponin I, troponin C, and tropomyosin form a regulatory switch that blocks myosin heads from binding to actin monomers until a nerve impulse stimulates an influx of calcium. This causes the switch to allow the myosin to bind to the actin and allows the muscle to contract. </span><span>
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Answer:
The female will not inherit a sex linked disorder if her father suffers rather "have chances or the disorder if the mother is the carrier" for the disorder.
Explanation:
A female has 2 X chromosome, which she got from her parents each. The females will get the disorder or the defective gene if the mother has defective X chromosome or if the father is carrying the same disorder from his father(grandfather). In both the cases the female will be the carrier and have chances to inherit the defect to the offspring. But the female will not affect as the male will. As the female has 2 X chromosomes, and hence the dominant X will compensate for the error in recessive X.
Answer:
my gut is telling me A because histamine sound familiar
<span>Okay, so herbivores are animals that feed on plants, so in Finding Nemo, those would be Bubbles (a yellow tang), the turtles, and Dory (a blue tang). On the other hand, carnivores are all animals that eat meat in order to survive, so in this cartoon, those animals would be primarily the sharks: Chum (a maiko shark), Bruce (a great white shark), and Anchor (a hammerhead shark). </span>
Answer:
Hi there!
Your answer is:
A. the esophagus passes food to the stomach
Explanation:
The the digestive process isn't fully about the action of digestion! The digestive process begins in your mouth, where salivary glands moisten the food to allow easier transport down the esophagus
I hope this makes sense!
