Which of the following statements is correct | vedclass

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(B) $1$. Inspiration is initiated by the contraction of the diaphragm,which increases the volume of the thoracic chamber in the anteroposterior axis.$

Vedclass · Accepted Answer

Contraction of the diaphragm increases the volume of the thoracic chamber in the anteroposterior axis.

Vedclass · Answer

(B) $1$. Inspiration is initiated by the contraction of the diaphragm,which increases the volume of the thoracic chamber in the anteroposterior axis.$2$. The contraction of external intercostal muscles $(EICM)$ lifts up the ribs and the sternum,causing an increase in the volume of the thoracic chamber in the dorsoventral axis.$3$. The diaphragm and external intercostal muscles $(EICM)$ are the primary muscles involved in inspiration.$4$. Normal expiration is a passive process because it occurs due to the relaxation of the diaphragm and intercostal muscles,which returns the thorax to its original position.

Which of the following statements is correct about the mechanism of breathing?

Similar Questions

The thoracic cavity increases in volume primarily due to the contraction of which of the following?

Assertion : Inspiration occurs due to muscular relaxation.
Reason : During inspiration,the diaphragm and external intercostal muscle contract simultaneously.

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Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement.

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