31.

Which of the following layer of heart wall consists of cardiac muscles ?

• Endocardium

• Myocardium

• Epicardium

• All of these

If heart beats 75 beats/min. then what is time for cardiac cycle ?

• 0.5 sec

• 0.8 sec

• 1 sec

• 1.5 sec

Blood pressure increases and heart rate decreases in response to :

• exercise

• haemorrhage

• exposure to high altitude

• increased intracranial pressure

'P' wave of ECG occurs before the:

• onset of ventricular ejection

• end of atrial contraction

• begining of atrial contraction

• none of the above

Liver in our body stores:

• Vitamin- A

• Vitamin- D

• Vitamin- B₁₂

• All of these

Secretin hormone is secreted by :

• liver

• pancreas

• intestine

• Brunner's glands

The contraction of gall bladder is due to :

• gastrin

• secretin

• enterogasterone

• cholecystokinin

Which of the following is the character of the bile juice?

• It has trypsin

• It has no enzyme

• It has enterogasterone

• It has tripophnomide

Average pH of human urine is :

• 6.0

• 9.0

• 3.0

• 7.0

Cells present in the inner lining of kidneys are :

• podocytes

• choanocytes

• pinocytes

• nephrocyte