1. Briefly explain why 6mM of potassium chloride (KCH) was introduced to match 9mM of sodium chloride. What concentration of potassium chloride would be used if that of sodium
chloride had been 15mM?
2. When deionized water was used in place of potassium chloride solution, there was no
sodium transport. Describe what would have happened if 6mM potassium chloride solution
was added to the OmM sodium chloride intracellular solution.
3. Upon introducing 400 glucose carrier molecules into the cell membrane, the rate of Na' and
K*transport was unaffected. Explain why such an observation was made.
4. State the mode of transport of Glucose, Na* and K, and explain the rationale behind your
choices of modes of transport, as stated above.

this would be a math

a = executive branch; b = judicial branch

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.