Question # 1

Aerobic respiation takes place in.

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Mitochondria

Chloroplast

Nucleus

Blood vessels

A substance that speed up the chemical reactions is called.

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Solute

Solvent

Solution

Catalyst

The ... prevents food from entering the trachea.

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Glottis

Epiglottis

Bronchi

Alveoli

Exchange of gases takes place in.

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Lungs

Bronchioles

Aleoli

Blood

Which blood cells protect our body from pathogens.

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Platelets

RCBs

WBCs

None of these

Which of the following plays an important role in blood clotting.

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Red blood cells

White blood cell

Platelets

Bone cells

The concentration of water in plasma is.

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55%

45%

92%

95%

One gram of glucose produce abut.............. calories of energy .

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3600

3700

3800

3900

The part of the heart which receives blood from lungs.

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Left atrium

Right atrium

Left ventricle

Right ventricle

Right atrium receives.

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Oxgynated blood

Deoxygenated blood

BOth types of blood

no blood

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