Which of these reactions are correct:
A.Creatine phosphate + ATP ?Creatine + 2ADP
B.Creatine phosphate ? Creatine + H3PO4 ADP + H3PO4 ? ATP
C.Both (a) & (b)
D.None of these
Category: Muscle Contraction Physiology Mcqs
Spur-like structures are found in the molecule of:
A.Action
B.Myosin
C.Both (a) & (b)
D.None of these
How much lactic acid formed is broken by oxidation to form CO2 and water:
A.1/2 part
B.2/3 part
C.3/4 part
D.1/5 part
Which of these are released before muscle contraction from sarcoplasmic reticulum:
A.Calcium ions
B.Magnesium ions
C.Potassium ions
D.None of these
Which of these processes mark the beginning of muscular contraction:
A.Release of calcium ions from sarcoplasmic reticulum
B.Withdrawal of calcium ions into sarcoplasmic reticulum
C.Both of these processes
D.None of these processes
Refractory period in muscles of man is:
A.0.1 seconds
B.0.2 seconds
C.0.3 seconds
D.None of these
Upwards and downwards rotation of body parts is done by:
A.Pronators and suppinators
B.Elevators and depressors
C.Both (a) & (b)
D.None of these
After death rigor mortis occurs in the muscles because:
A.Sarcoplasm has no glycogen
B.Actomyosin ADP complex is not broken dur to lack of supply of ATP as oxygen and other substrates for its synthesis are not present
C.Myosin filmanets are shortened
D.There is some other reasons
M’ curves on kymogram are seen during:
A.Summation
B.Treppe
C.Fatigue
D.Tetany
