Related Questions

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
The skin, the lining of the mouth, the lining of the blood vessels, lung alveoli and kidney tubules are all made of which type of tissue?
A Epithelial tissue
B Connective tissue
C Muscular tissue
D Nervous tissue
Surfactant of lung alveoli
A Contains phospholipids
B Prevents oedema formation in the alveolar wall
C Stabilizes the size of an alveolus
D Reduce surface tension by approximately 30%
E Produces a mononuclear layer
Types of cells found in the alveoli are
A Type I cells
B Type II cells
C Phagocytes
D Brush cells
E Clara cells
Alveoli
A Are lined by simple squamous epithelium
B Contains reticular fibers that prevent over distension
C Has communication with its neighbour
D Has alveolar macrophage in its surface
E Contain 97% of type II cell
The lung alveoli
A Are connected to each other to equalize air pressure
B Need to reduce their surface tension to prevent collapse
C Are present throughout the respiratory part of the bronchial tree
D Are lined by larger number of type I pneumocytes than type II pneumocytes
E Have epithelium without basal lamina
The surfactant lining the fluid of the lung alveoli increases
A The compliance of the lungs
B Stability of the size of alveoli
C The work of breathing
D Pulmonary capillary filtration pressure
E The elasticity of the lungs
Surfactant in alveoli
A Helps to prevent pulmonary edema
B Is decreased in cigarette smokers
C Is influenced by glucocorticoids
D Promotes alveolar collapse
E Spread beneath the alveolar epithelium
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
A Change
B Does not change
C Changes periodically
D None of these
Nephron is related to which of the following system of human body?
A Circulatory system
B Excretory system
C Reproductive system
D Respiratory system

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