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Home Q & A Board Biology-Related Homework Help General Biology
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Kaetlynrenae Kaetlynrenae
wrote...
Posts: 474
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6 years ago
Which of these is false about sudden cardiac
  arrest?
  a. It happens more than 300,000 times
  annually in the United States.
  b. It affects only the elderly.
  c. Survival is greatly increased by starting
  CPR within four to six minutes.
  d. Prompt defibrillator use increases the
  chance of survival.
  e. None of these are false

Question 2

In the absence of a nerve connection or electrical stimulation, can a muscle cell be made to contract in
  a laboratory setting? What will be an ideal response?
 
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Replies
wrote...
#1
6 years ago
Answer to q. 1

B

Answer to q. 2

Yes. The key event in causing a muscle to contract is increasing the cytoplasmic calcium levels, as
calcium is responsible for removing the tropomyosin from the binding sites on the actin. Thus, by
injecting calcium into the cells they could be made to contract.
Kaetlynrenae Author
wrote...
#2
6 years ago
This is very helpful, my teacher this year is not good
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