Home
Class 11
BIOLOGY
Assertion : Ca^(2+) plays important role...

Assertion : `Ca^(2+)` plays important role in the muscle contraction.
Reason : `Ca^(2+)` Combines with troponin chain, displacing tropomyosin allowing the myosin head part to combine with actin to from actomyosin complex .

A

If both Assertion and Reason are ture and the Reason is the correct explanation of the Assertion.

B

If both Assertion and Reason are ture, but the Reason is not the correct explanation of the Assertion.

C

If Asserion is ture, but Reason is false .

D

If both Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • LOCOMOTION AND MOVEMENT

    CENGAGE BIOLOGY|Exercise ARCHIVES|12 Videos

  • EXCERETORY PRODUCTS AND THEIR ELIMINATION

    CENGAGE BIOLOGY|Exercise ARCHIVES|22 Videos

  • MINERAL NUTRITION

    CENGAGE BIOLOGY|Exercise ARCHIVES|39 Videos

Similar Questions

Explore conceptually related problems

Assertion : - Ca^(++) play an important role in the muscle contraction. Reason :- Calcium bind with a subunit of troponin on actin filaments and thereby remove the masking of active sites for myosin.

During muscle contraction in a sjeletal muscle fibre Ca^(2+) combines with

EDTA injected into muscles combines with Ca^(2+) and

Discuss the role of Ca^(2+) ions in muscle contractions. Draw neat sketches to illustrate your answer.

Assertion: Tetany is the rapid spasms in muscle. Reason: Tetany is due to low Ca^(2+) in body fluid.

Go through the following statements During muscle contraction, the width of A-band remains constant while I-band shortens. During muscle contraction, the Ca^(2+) released from the SR bind to the troponin component of thin filament The process of muscle contraction is faster in smooth muscle as they have a well developed sarcoplasmic reticulum. The red muscle fibres have abundant mitochondria, low glycogen and poorly formed sarcoplasmic reticulum.

Assertion. On receiving action potential via T-tubules, the sarcoplasmic reticulum releases Ca^(++) into the sarcoplasm. Reason. Ca^(++) uncover the active site of actin myofilament, allowing a meromyosin head to join this site.

Ca^(2+) ions play an important role in (i) neuromuscular function (ii) interneuronal transmission (iii) cell membrane integrity (iv) blood coagulation

Assertion: Plants absorb calcium from soil in the form of calcium ions (Ca^(2+)) Reason: Calcium is required by meristematic and differentiating tissues.