Practice PPSC Everyday Science questions with answers and explanations.
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The eye focuses light onto the retina.
Photoreceptors convert it into nerve signals.
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The cochlea contains hair cells that respond to sound vibrations.
These signals travel through the auditory nerve.
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Taste buds contain receptor cells for dissolved chemicals.
They contribute to sweet, sour, salty, bitter, and umami sensations.
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A balanced diet supplies energy, building materials, vitamins, minerals, fiber, and water.
Needs vary with age and activity.
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The liver is the largest internal solid organ.
It performs metabolism, detoxification, and bile production.
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The femur is the thigh bone.
It is also one of the strongest bones.
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Bones support body shape and protect organs.
They also provide attachment points for muscles.
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Tendons are strong connective tissues linking muscles to bones.
They transmit muscular force to the skeleton.
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The liver produces bile.
The gallbladder stores and concentrates it.
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Bile breaks large fat globules into small droplets physically.
This increases surface area for lipase action.
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The gallbladder stores and concentrates bile made by the liver.
It releases bile into the small intestine.
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Salivary amylase starts breaking starch into smaller sugars.
Its action continues briefly after swallowing.
