Ear | MCQs

Explanation

The epicenter of an earthquake is the point on the earth's surface vertically above the focus. Maximum damage is caused at the epicenter.

زلزلے کا مرکز زمین کی سطح پر عمودی طور پر اوپر کی حیثیت سے ایک نقطہ ہے۔ زیادہ تر نقصان زلزلے کے مرکز پر ہوتا ہے۔

Explanation

The inner planets, or terrestrial planets, are the four planets closest to the Sun:ev

Explanation

As you move toward the center of the Earth, the gravitational force decreases because mass below you exerts less pull.

Therefore, the weight of a body decreases as gravity weakens.

Explanation

The temperature within 10 km of the Earth's core is approximately 4000 Kelvin (K).

At such depths, the temperature is incredibly high due to the immense pressure and heat generated by the Earth's core.

Explanation

The smallest bone in the human body, the stapes, is located in the ear.

It is part of the middle ear and helps transmit sound vibrations.

The largest bone is the femur, or thigh bone, which supports the weight of the body.

Explanation

Gentamicin is an aminoglycoside antibiotic that is well-known for its ototoxic effects

Potentially causing damage to the inner ear and leading to hearing loss or balance issues.

The other drugs listed are not typically associated with ototoxicity:

1. Contimycin: This appears to be a less commonly used or less well-known drug; assuming it refers to an antibioticIt is not generally recognized for ototoxicity.
2. Amoxicillin: This is a penicillin-type antibiotic and is not known to be ototoxic.
3. Erythromycin: This is a macrolide antibiotic and, it is not typically ototoxic.
4. Penicillin: This class of antibiotics is not associated with ototoxicity.

Explanation

Among the options provided, the condition that is commonly associated with long-standing cases of chronic suppurative otitis media is:

• Persistent tympanic membrane (T.M.) perforation
  

Chronic suppurative otitis media can cause a persistent perforation of the tympanic membrane, especially with repeated or chronic infections.

Explanation

Among the options provided, the condition that is commonly associated with long-standing cases of chronic suppurative otitis media is:

• Persistent tympanic membrane (T.M.) perforation
  

Chronic suppurative otitis media can lead to persistent perforation of the tympanic membrane,

which may fail to heal over time, especially in cases with repeated or chronic infections.

Explanation

We see the sunrise and sunset because of Earth's rotation about its own axis.

Earth is rotating about its own axis from West to East.

So, when seen from the Earth,

the Sun appears to rise in the East and set in the West

ND5-07-2023

Explanation

The magnitude of an earthquake is a single value that describes the size of the earthquake at its source

Earthquake Magnitude Scale

5.5 to 6.0: Slight damage to buildings and other structures.

6.1 to 6.9: May cause a lot of damage in very populated areas.

7.0 to 7.9: Major earthquake. Serious damage.

8.0 or greater: Great earthquake. Can totally destroy communities near the epicenter.

ND-21-5-2023