Sarcomere is the functional unit of contraction in a muscle fibre. Identify the portion of myofibril that constitute a sarcomere.
- The portion of myofibril between two successive�M�line.
- The portion of myofibril between two successive �I� band.
- The portion of myofibril between two successive �A� band.
- The portion of myofibril between two successive �Z� line.
The Correct Option is D
Solution and Explanation
Top Questions on locomotion and movement
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A. It is initiated by a signal sent by CNS via sensory neuron.
B. Neurotransmitter generates action potential in the sarcolemma.
C. Increased 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.
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Reason (R): Common cause of osteoporosis is increased levels of oestrogen.
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Questions Asked in KCET exam
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Concepts Used:
Locomotion and Movement
Locomotion
The movement of a creature from one place to another is known as locomotion. During the process, there is the action of appendages such as wings, limbs, and flagella. In some animals, like fish, whales, and sharks, locomotion upshots from a wave-like series of muscle contractions. Locomotion helps an organism in finding their food, avoid harsh weather conditions, escape from their predators, etc.
Some examples of locomotion are walking, running, swimming, etc. Movement, on the other hand, refers to any type of motion that need not be localized.
Read More: Locomotion and Movement
Movement
Movement is generally described as a state of changing the position from rest to motion or vice-versa. Movement can be both voluntary movement and involuntary movement. Movement helps an organism perform essential functions, such as pumping blood to the different parts of the body, etc.
Read More: Difference between Locomotion and Movement