Which of the following is not a difference between cardiac and skeletal muscle?
cardiac muscle cells quickly die in the absence of oxygen; skeletal muscle cells are better able to adapt to oxygen deficiency.
the plasma membranes of cardiac muscle cells interlock, but skeletal muscle fibers are independent.
cardiac muscle does not use the sliding filament mechanism for contraction; skeletal muscle does.
cardiac muscle cells contain more mitochondria than do skeletal muscle cells.

The correct option is this: CARDIAC MUSCLE DOES NOT USE THE SLIDING FILAMENT MECHANISM FOR CONTRACTION, SKELETAL MUSCLE DOES.

Explanation:

The muscles found in the heart are called cardiac muscles while the ones found in the skeleton are called skeletal muscles. Both muscles have some differences and similarities. One similarity between the two is that both of them are striated muscles. Also, both cardiac and skeletal muscles use the sliding filament mechanism for contraction.

The differences include the following:

1. Skeletal muscles are involved in voluntary movement while cardiac muscles engage in involuntary movement.

2. Cardiac muscles can not survive for long in the absence of oxygen while skeletal muscle can adapt to absence of oxygen.

3. Cardiac muscles cell have more mitochondria compare to skeletal muscles cells.

protocol for imps extraction focusing on membrane protein extraction, solubilisation, and purification.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."