Shivering of body and clattering of teeth in cold is a method for:
A.Preventing radiations of heat from body
B.Production of heat by muscular contraction
C.Production of heat by muscular friction
D.Increasing blood supply to skin
Category: Muscle Contraction Physiology Mcqs
During relaxation the calcium ions are:
A.Released from sarcoplasmic reticulum into sarcoplasm
B.Forced back from sarcoplasm to sarcoplasmic reticulum
C.Further forced from sarcoplasmic reticulum into sarcoplasm
D.Neither released more nor forced back but remain constant
Under which of these disorders the muscle remains atrophied for a long time:
A.Paralysis
B.Rigor Mortis
C.Tetany
D.None of these
Function of boosters in the contraction of cardiac muscles is performed by:
A.Myosin
B.Intercalary discs
C.Cross-bridges
D.Sarcomeres
Which of these substances on accumulation causes muscular fatigue:
A.Pyruvic acid
B.Creatine phosphate
C.Lactic acid
D.None of these
Which of these muscle respectively flex and straighten our arm:
A.Biceps and triceps
B.Adductors and abductors
C.Pronators and suppinators
D.None of these
In which of these conditions the muscle offers no contraction:
A.Fatigue
B.Treppe for short time
C.Summation
D.None of these
How much lactic acid formed is resynthesized into glycogen:
A.1/2 part
B.3/4 part
C.4/5 part
D.1/4 part
Muscles are fatigued by accumulation of:
A.Myosin ATPase
B.Carbondioxide
C.Lactic acid
D.None of these
Which of these proteins are attached with actin of myofibril:
A.Trponin
B.Tropomyosin
C.Both (a) & (b)
D.None of these
