State wheather the given statements are true or false I. Ventilla… - Vidyadip

MCQ

State wheather the given statements are true or false

$I.$ Ventillation in humans is an active process

$II.$ Diaphragm helps in generating the pressure gradient in the lungs

Choose the correct option

A
$I -$ True, $II -$ False
✓
$I -$ True, $II -$ True
C
$I -$ False, $II -$ True
D
$I -$ False, $II -$ False

✓

Answer

Correct option: B.

$I -$ True, $II -$ True

b
- Breathing involves Inhalation an active process involving contraction of diaphragm muscles and intercostal muscle and Exhalation a passive process, where the muscles relax without expenditure of energy. Overall becomes active.

- diphragm muscle contraction pulls diaphragm down increasing the anterioposterior volume of thoracic cavity creating a pressure gradient in lungs wrt air in the atmosphere.

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