Tag: locomotion and movements
Questions Related to locomotion and movements
During resting stage the binding site of action of myosin remains masked by
The contraction of muscles of shortest duration is seen in
Which of the following type of muscle fibers are supplied with both central and autonomic nervous system and are not under the control of the will of the organism, have a rich blood supply and have the property of contraction even when they are isolated from the body temporarily?
If some skeletal muscle fibres are soaked in glycerol or a dilute salt solution, a number of proteins leak out of the fibres without any change in the appearance of the sarcomeres. Such a preparation will contract, if the fibres are supplied with magnesium ions, ATP and calcium ions. The proteins that have leaked out are of the type known as_____________.
Read the statements about the mechanism of muscle contraction and select the correct answer.
I. Acetylcholine is released when the neural signal reaches the motor end plate.
II. Muscle contraction is initiated by a signal sent by CNS via a sensory neuron.
III. During muscle contraction, isotropic band gets elongated.
IV. Repeated activation of the muscles can lead to lactic acid accumulation.
Which of the following option shows correct order of some stages of muscle contraction from the beginning to the end of the process?
Which of the following is not involved in muscle contraction?
Muscle contraction is initiated by a signal by the central nervous system via
Consider the following statements each with one or two blanks.
(i) Repeated activation of the muscles can lead to the accumulation of (A) due to anaerobic breakdown of glycogen in them, causing fatigue.
(ii) The globular head of meromyosin is an active ATPase enzyme and has binding sites for (B) and active sites for (C).
(iii) This central part of thick filament, not overlapped by thin filaments is called the (D) .
Which one of the following options correctly fills the concerned blanks?
Relaxation of muscle is due to -