1. Sequence of ear ossicles from outside to inside is ____________
a) Malleus incus stapes
b) Incus stapes Malleus
c) Stapes incus malleus
d) Malleus stapes incus
Explanation: Ear ossicles are three bones in middle ear. They are the smallest bones in humans. The term ossicle means tiny bones.
2. Which of the following is balancing organ?
a) Organ of corti
b) Cochlea
c) Vestibular region
d) Eardrum
Explanation: Vestibule is the central art of inner ear and is situated medial to eardrum behind cochlea. It contains organ of hearing (cochlea) and organ of balance (labyrinth)
3. What separates the outer ear from the middle ear?
a) Auricle
b) Ear wall
c) Cochlea
d) Ear drum
Explanation: Eardrum is a thin cone-shaped membrane. It separates the external ear from the middle ear. It is also called a tympanic membrane
4. Which part of the ear takes sound waves and turns them into vibrations?
a) Middle war
b) Ear wall
c) Ear canal
d) Inner ear
Explanation: Middle war contains 3 bones. These 3 bones form a connection from the eardrum to the inner ear. As sound waves hit the eardrum, the eardrum moves back and forth causing the ossicles to move
5. During inspiration the diaphragm ____________
a) Reflexes to become dome shaped
b) Contracts and flattens
c) Expands
d) Shows no change
Explanation: Drawing of breath is called as inhalation. It is also known as inspiration. During this process the air is drawn inside the lungs and the diaphragm contracts and flattens
6. Lungs are covered by _______
a) Pleural membrane
b) Peritoneum
c) Pericardium
d) Muscles
Explanation: Pleural membrane is the thin, moist and has two layers. Between two layers is the intrapleural space, which contains fluid secreted by the membrane.
7. Total number of alveoli in both the lungs is?
a) 3000
b) 30000
c) 500000000
d) 700000000
Explanation: Alveoli are tiny sacs within the lungs. It allows carbon dioxide and oxygen t move between lungs and bloodstream.
8. Lungs have large number of narrow tubes called ____________
a) Alveoli
b) Bronchioles
c) Bronchi
d) Trachea
Explanation: Bronchioles are the smallest airways within the lungs. They are not encircled by any cartilage
9. Alveoli of lungs are lines by ____________
a) Squamous epithelium
b) Simple epithelium
c) Cuboidal epithelium
d) Columnar epithelium
Explanation: Squamous epithelium is a single layer of flat cells in contact with the basal lamina. It helps in easy movement of gas in the lungs
10. How many unpaired cartilage are present in larynx?
a) 2
b) 3
c) 4
d) 1
Explanation: There are 3 unpaired cartilages present in the larynx. They are cricoids, thyroid and epiglottis.