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Elan Coil [88]
3 years ago
5

Is peter receiving enough dietary iron? assume that he eats the entire portions?

Biology
1 answer:
Ratling [72]3 years ago
6 0

A balanced diet should cover the needs. Iron is mainly present in meat.

Iron needs vary according to sex, age, and physiological status. The recommended dietary intakes are 9 mg per day for men and women breastfeeding and menopausal, 16 mg for women and 25 mg for pregnant women.

Peter had 10.8mg of iron, so yes it is enough for his needs.

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Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.

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Which is the bacteria that is most concerning regarding a plantar puncture wound to the sole of the foot through a rubber soled
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Using the sliding flament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium woul
Arte-miy333 [17]

Answer:

  1. Calcium binds to troponin C
  2. Troponin T moves tropomyosin and unblocks the binding sites
  3. Myosin heads join to the actin forming cross-bridges
  4. ATP turns into ADP and inorganic phosphate and releases energy
  5. The energy is used to impulse myofilaments slide producing a power stroke
  6. ADP is released and a new ATP joins the myosin heads and breaks the bindings to the actin filament
  7. ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, starting a new cycle
  8. Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

Explanation:  

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing <u>calcium into the sarcolemma.</u> At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join to the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

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