Which of the following statement are tru...

Which of the following statement are true ?

The partial pressure of oxygen in deoxygeneted blood is 40 mm Hg.

The partial pressure of oxygen in oxygeneted blood is 95 mm Hg.

The partial pressure of `CO_(2)` in the alveolar air is 40 mm Hg.

Only `95%` of Haemoglobin is available for `O_(2)` carriage

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A, B, D

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Which of the following statements are true for stomach ?

it is located in the upper left portion of abdominal cavity

in stomach mucosa layer forms irregular folds called rugae

mucosa layer forms glands in stomach called crypts of lieberkuhn'

the capacity of stomach 1.5 to 1.7 litre

Forceful expiration is an active process

Mammals have negative pressure breathing

Respiration excretes `CO_(2), H_(2)O` etc.

one can easily breath in and out by moving the diaphragm along without moving the ribs at all

silicon doped with electron rich impurity is a p-type semiconductor

silicon doped with an electron rich impurity is an a n-type semiconductor

delocalised electrons increase the conductivity of doped silicon

an electron vacancy increases the conductivity of n-type semiconductor