Lungs

Q. The membranes enclosing the lungs are called

1. mediastinum
2. pleura
3. pulmones
4. pericardium

Q.

Which of these statements is incorrect regarding the mechanism of breathing?

1. The contraction of external intercostal muscles lifts up the ribs and the sternum causing a decrease in the volume of the thoracic chamber.

2. Inspiration is initiated by the contraction of diaphragm, which increases the volume of thoracic chamber.

3. Creating a pressure gradient between the lungs and the atmosphere carries out the movement of air into and out of the lungs.

4. On an average, a healthy human breathes around 12-16 times/min.

Q.

The thoracic cage of human beings is formed by

1. Ribs and Sternum

2. Ribs, Sternum and Lumbar vertebrae

3. Ribs, Sternum and Thoracic vertebrae

4. Ribs and Thoracic vertebrae.

Q.

Double layered, thin membranous sacs which cover the lungs are called as____

1. meninges

2. pericardium

3. peritoneum

4. pleura

Q.

The alveoli of lungs are lined by

1. Cuboidal epithelium

2. Simple epithelium

3. Squamous epithelium

4. Columnar epithelium

5. Ciliated epithelium

Q.

Match the following parts of the lungs with their names.

1. 1. Cardiac notch 2. Apex 3. Base 4. Fissure

2. 1. Apex 2. Base 3. Cardiac notch 4. Fissure

3. 1. Apex 2. Cardiac notch 3. Fissure 4. Base

4. 1. Fissure 2. Cardiac notch 3. Base 4. Apex

Q. Match the following parts of the lungs to their functions.

1. End of thorax
2. Divide into lobes
3. Covering of lungs
4. Reduces friction

Q.

Where do we find ciliated columnar simple epithelium?

1. Ducts of Salivary glands

2. Nostrils

3. Endometrium

4. Bowman's Capsule

Q. The lungs are bound anteriorly by the and posteriorly by the .

1. liver
2. spine
3. sternum
4. heart

Q. The ciliate species showing symbiosis with green algae Zoochlorella is

1. Paramecium bursaria
2. Paramecium aurelia
3. Paramecium caudatum
4. None of the above

Q.

Which of the following form thoracic cage of man?

1. Ribs

2. Sternum

3. Thoracic vertebrae

4. Lumbar vertebrae

Q.

Dome-shaped partition under the chest is called as_____

1. lungs

2. bronchi

3. diaphragm

4. alveoli

Q. Which one of the following organelle occurs in molluscs but not in Echinoderms?

1. Malpighian tubules
2. None of the above
3. Flame cells
4. Kidney

Q. How much long the alimentary canal

Q.

The pleurae are vital to the integrity of the lungs because -

1. They contain cilia that protect the lungs.

2. They maintain proper temperature of the lungs during sleep.

3. Pleural cavity forces the lungs to expand resulting in active inhalation and passive exhalation.

4. They produce a lubricating serous secretion, allowing the lungs to glide over the thorax wall during breathing.