Assertion `:-` Strong pneumotoxic signal results complete filling of lungs.
Reason `:-` Strong pneumotaxic singla increases the duration of inspiration as well as expiration.

Assertion :- Pneumotaxic centre can moderate the functions of the respiratory rhythm centre. Reason :- Neural signal from pneumotoxic centre can reduce the duration of inspiration and thereby the alter the respiratory centre

Strong neural signals from the pneumotaxic centre 1) increase the respiratory axis 2) increase the duration of respiration 3) Decrease the duration of respiration 4) Both 1 and 2

Assertion (A)Although Zn is the member of Ist series yet not a transition element. Reason ( R) The orbitals in Zn are completely filled in ground as well as in oxidation state.

Assertion : Polyamides are best used as fibres because of high tensile strength. Reason : Strong intermolecular forces (like hydrogen bonding within polyamides) lead to close packing of chains and increase the crystalline character, hence, provide high tensile strength to polymers.

Assertion (A): Polyamides are best used as fibres because of high tensile strength. Reason (R) : Strong intermolecular forces (like hydrogen bonding within polyamides) lead to close packing of chains and increase the crystalline character, hence, provide high tensile strength to polymers.

Assertion (A) In brain stem, pons is called pneumotaxic centre with the ability to moderate the function of the ' respiratory rhythm' centre. Reason ( R) Neural signals from the centre can reduce the duration of expiration, thereby alter the respiratory rate

Assertion : The abdominal muscles are primarily involved in generating pressure gradient between the lungs and the atmosphere. Reason : The strength of inspiration and expiration can be increased by abdiminal muscles in diaphragm and intercostal muscles.

Assertion : The abdominal muscles are primarily involved in generating pressure gradient between the lungs and the atmosphere. Reason : The strength of inspiration and expiration can be increased by additional muscles in diaphragm and intercostal muscles.