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Q:

A US team of scientists has found that the mechanism responsible for the ageing process is located --

A) Inside the face B) Inside the skin
C) Inside the brain D) Inside the heart
 
Answer & Explanation Answer: C) Inside the brain

Explanation:
The US team of scientists found the mechanism in the hypothalamus, which is located deep inside the brain and showed that it is responsible for the ageing process.
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Q:

Which is the largest gland in human body?

A) Liver B) Thyroid
C) Pituitary D) Salivary gland
 
Answer & Explanation Answer: A) Liver

Explanation:
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Q:

Which organ produces insulin?

A) Liver B) Thyroid gland
C) Spleen D) Pancreas
 
Answer & Explanation Answer: D) Pancreas

Explanation:
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Q:

Which of the following is responsible for giving colour to human skin?

A) Luciferin B) Haemoglobin
C) Flavonoids D) Melanin
 
Answer & Explanation Answer: D) Melanin

Explanation:
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Q:

The largest artery in human body is

A) Aorta B) Capillary
C) Vena cava D) Pulmonary vein
 
Answer & Explanation Answer: A) Aorta

Explanation:
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Q:

Which of the following is an emergency hormone in humans?

A) Thyroxine B) Insulin
C) Adrenalin D) Progestrone
 
Answer & Explanation Answer: C) Adrenalin

Explanation:
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Q:

Which of the following classes of animals has/have three-chambered heart?

A) Pisces and Amphibia B) Amphibia and Reptilia
C) Reptilia only D) Amphibia only
 
Answer & Explanation Answer: B) Amphibia and Reptilia

Explanation:

Mammalian and avian hearts have four chambers two atria and two ventricles.Amphibians and reptiles, by contrast, have a three-chambered heart. The three-chambered heart consists of two atria and one ventricle.Fish possess the simplest type of true heart a two-chambered organ composed of one atrium and one ventricle.

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Q:

All respiratory equipment must be approved byl  

A) RPSEC B) OSHA
C) NIOSH D) CDC
 
Answer & Explanation Answer: C) NIOSH

Explanation:

The National Institute for Occupational Safety and Health (NIOSH) will approve all respiratory equipment.

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