1. The filtration units of kidneys are called ?

neurons

urethra

nephrons

ureter

Answer: nephrons

Explanation:


2. When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of ?

water vapour

nitrogen

carbon dioxide

oxygen

Answer: carbon dioxide

Explanation:


3. Oxygen liberated during photosynthesis comes from ?

glucose

chlorophyll

water

carbon dioxide

Answer: water

Explanation:


4. Which part of alimentary canal receives bile from the liver ?

Oesophagus

Large intestine

Stomach

Small intestine

Answer: Small intestine

Explanation:


5. Haemoglobin is ?

Respiratory pigment

Carbohydrate

Vitamin

Skin pigment

Answer: Respiratory pigment

Explanation:


6. Arteries carry oxygenated blood except ?

Systemic

Hepatic

Pulmonary

Cardiac

Answer: Pulmonary

Explanation:


7. Name a circulatory fluid in the human body other than blood ?

Plasma

Lymph

RBC

Platelets

Answer: Lymph

Explanation:


8. The instrument used to hear heart sound is ?

Haemometer

Stethoscope

Sphygmomanometer

Electrocardiograph

Answer: Stethoscope

Explanation:


9. A blood vessel which pumps the blood from the heart to the entire body ?

Haemoglobin

Vein

artery

capillary

Answer: artery

Explanation:


10. Which is the first enzyme to mix with food in the digestive tract ?

Amylase

Trypsin

Cellulase

Pepsin

Answer: Amylase

Explanation:

When we eat something a fluid called saliva secreted by the salivary glands. The saliva contains an enzyme called salivary amylase that breaks down starch which is a complex molecule to give simple sugar.