Structural Organisation In Animals Question 146
Question: Assertion : Intercalated discs are important regions of cardiac muscle cells. Reason : Intercalated discs function as boosters for muscle contraction waves.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: A
Solution:
Cardiac muscle cells are short cylindrical cells joined end to end and by side branching to form a network.
Intercalatd discs are the dense junctions formed in between the cardiac muscle cells where they meet each other.
Intercalated discs are the specialised regions of the cells membranes.
As cardiac muscle possesses considerable rhythmicity and generates its own wave of excitation, these discs function as boosters for muscle contraction wave.
BETA
