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Membrane Proteins and Muscle Pain Quiz

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Questions and Answers

What is the possible underlying cause of exertional rhabdomyolysis?

Variation in total antioxidant status

Increased oxidative stress

Blood leukocyte counts

Sickle cell disease (correct)

Which urinary constituents are used as an index of muscle injury after exercise?

Hydroxyproline and hydroxylysine (correct)

Amino acids valine and leucine

Creatine and creatinine

Uric acid and urea

What does dark urine after strenuous activities indicate?

Breakdown of connective tissue (correct)

Dehydration

High iron levels

Increased antioxidant levels

What is the key effector that links inflammation with DNA damage after exhaustive endurance exercise?

Reactive oxygen species (ROS) Signup and view all the answers

Which method should be used to detect myoglobinuria and haemoglobinuria to confirm rhabdomyolysis?

Immunochemical methods Signup and view all the answers

What is the role of tropomyosin in muscle contraction?

It binds to actin filaments, blocking the attachment sites for myosin head groups Signup and view all the answers

What is the role of troponin in muscle contraction?

It is a Ca2+-binding protein that initiates contraction when bound to calcium Signup and view all the answers

What is the role of the sarcoplasmic reticulum in muscle contraction?

It releases calcium ions to initiate the contraction process Signup and view all the answers

What is the primary energy source for muscle contraction?

ATP Signup and view all the answers

What is the function of the myofibrils in muscle cells?

They are bundles of parallel actin and myosin filaments responsible for contraction Signup and view all the answers