NEET UG 2007 — Zoology Locomotion and Movement

Select the correct statements regarding mechanism of muscle contraction. A. It is initiated by a signal sent by CNS via sensory neuron. B. Neurotransmitter generates action potential in the sarcolemma. C. Increased $\mathrm{Ca}^{++}$level leads to the binding of calcium with troponin on action filaments. D. Masking of active site for actin is activated. E. Utilising the energy from ATP hydrolysis to form cross bridge. Choose the most appropriate answer from the options given below:

Match List I with List II :  Choose the correct answer from the options given below :

Match List-I with List-II: $\begin{array}{|l|l|r|l|}\hline & \begin{array}{l} \text{List I} \\ \text{Location of Joint} \end{array} & & \begin{array}{l} \text{List II} \\ \text{Type of Joint} \end{array} \\ \hline A. & \begin{array}{l} \text{Joint between humerus and} \\ \text{pectoral girdle} \end{array} & I. & \text{Gliding joint} \\ \hline B. & \text{Knee joint} & II. & \text{Ball and Socket joint} \\ \hline C. & \text{Joint between atlas and axis} & III. & \text{Hinge joint} \\ \hline D & \text{Joint between carpals} & IV. & \text{Pivot joint} \\ \hline \end{array}$ Chose the correct answer from the option given below:

Match List-I with List-II.  Choose the correct answer from the options given below:

Which of the following statements are correct regarding the skeletal muscle? A. Muscle bundles are held together by collagenous tissue layer called fascicle. B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions. C. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins. D. M line is considered as functional unit of contraction called sarcomere. Choose the most appropriate answer from the options given below: