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Fiesta28 [93]
3 years ago
6

The cross bridge cycle starts when _________.

Chemistry
1 answer:
Elis [28]3 years ago
7 0

Answer:

b) Ca2+ from the sarcoplasmic reticulum binds to troponin

Explanation:

The release of the calcium ions initiates the muscle contractions. The release is triggered from the storage in sarcoplasmic reticulum. These ions initiates contraction that is sustained by the ATP .The Ca^{2+} ions from sarcoplasm bind to the troponin which drive cross-bridge cycling and pulling of the actin strands by the myosin.

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Weathering,erosion,pressing and cementing form what type of rock?
wlad13 [49]
Sedimentary Rock because  weathering and erosion breaks down the rock. Then, while the rock is being pressed and cemented, its forms sediments.


6 0
3 years ago
Part a how many grams of xef6 are required to react with 0.579 l of hydrogen gas at 6.46 atm and 45°c in the reaction shown belo
Nina [5.8K]
First, let us find the corresponding amount of moles H₂ assuming ideal gas behavior.

PV = nRT
Solving for n,
n = PV/RT
n = (6.46 atm)(0.579 L)/(0.0821 L-atm/mol-K)(45 + 273 K)
n = 0.143 mol H₂

The stoichiometric calculations is as follows (MW for XeF₆ = 245.28 g/mol)
Mass XeF₆ = (0.143 mol H₂)(1 mol XeF₆/3 mol H₂)(245.28 g/mol) = <em>11.69 g</em>
6 0
4 years ago
The average osmotic pressure of ocean water is 28 atm corresponding to a concentration of 0.50m solutes. what is the approximate
RideAnS [48]
Answer : 0.125 M

Explanation : The definition of osmotic pressure is "<span><em>the pressure can be applied on a pure solvent to prevent it passing into a given solution by osmosis</em>".
</span>
So according to this definition, osmotic pressure can be called as directly proportional to the concentration of the solution and hence the pressure can also be directly proportional to the concentration.

Hence, if pressure is getting decreased from 28 to 7 it means it got decreased by 4 times;
28 / 7 = 4 that means;

So the concentration will be also decreased by 4 times so, 0.50 / 4 = 0.125 M
6 0
3 years ago
For a multistep reaction the observed order of
Mkey [24]

Answer: 3 slowest reaction of the squence

Explanation:

4 0
3 years ago
Which pair of formulas represents the same compound? ch3ch2cho; ch3ch2cooh ch3coh(ch32; (ch3 3coh c2h5oh; ch3och3 (ch32co; ch3oc
DiKsa [7]
CH3COH(CH3)2; (CH3)3COH is the answer. Please let me know if this helps.
8 0
4 years ago
Read 2 more answers
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