Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Choose the correct answer from the alternatives given.
Which of the following constitutes the wind pipe, or the upper four inches of the airway?

  1. Trachea

  2. Pharynx

  3. Larynx

  4. Bronchi
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The trachea is also known as the windpipe and is part of the passageway that supplies air to the lungs, it is about 4.5 inches long. The trachea branches into the bronchi that act as the passageways that enter the lungs. The larynx connects the nasal and oropharynx with the trachea and functions in air conduction and vocalization. The pharynx is the part of the throat behind the mouth and nasal cavity. The trachea connects the pharynx and the larynx to the lungs. So, the correct option is 'trachea'.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

State whether the following statements are true or false.
Lungs are completely emptied and refilled with fresh air during breathing.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Even after the most forcible expiration possible some amount of air remains in the lungs. This is known as the residual volume and is about 1200 ml. So, the correct option is 'False'.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Choose the correct answer from the alternatives given.
In human lungs, gas exchange occurs at the

  1. two bronchi

  2. alveolar sacs

  3. pleural sacs

  4. both (b) and (c)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In humans, gas exchange occurs in the lungs between the alveoli and the capillaries located on the walls of the alveoli. The inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli. So, the correct option is 'alveolar sacs'.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

State whether the following statements are true or false.
Gas exchanges continue uninterrupted in lungs even after a forceful expiration.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Even after the most forcible expiration possible some amount of air remains in the lungs. This is known as the residual volume and is about 1200 ml. This keeps the alveoli open as some air is always present inside the lung alveoli even during expiration. So, the correct option is 'true'.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Choose the correct answer from the alternatives given.
Simple squamous non-ciliated epithelium is found in

  1. alveoli

  2. bronchi

  3. bronchioles

  4. trachea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Simple squamous non-ciliated epithelia are found in capillaries, alveoli, and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei. It is also called pavement epithelium due to its tile-like appearance. The bronchi are lined by ciliated, pseudostratified columnar epithelium and bronchioles are lined by simple cuboidal epithelium. So, the correct option is 'alveoli'.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Lungs are enclosed in

  1. Perichondrium

  2. Pericardium

  3. Pleural membrane

  4. Peritoneum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Each lung is enclosed by a double-layered serous membrane, called the pleura. The visceral pleura is firmly attached to the surface of the lung. At the hilum, the visceral pleura is continuous with the parietal pleura that lines the wall of the thorax.

So, the option is 'Pleural membrane'.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Consider the following statements each with one or two blanks.
(i)    Left lung has _(1) lobes and right lung has (2) lobes.
(ii)   Prawn respires with (3) and insects with (4).
(iii) Amount of air inhaled and exhaled with maximum effort is referred to as the (5) of the lungs.
Fill up the above blanks by selecting the correct option.

  1. (1) - three, (2) - two, (3) - gills (4)-tracheae

  2. (1) - two, (2) - three, (5) - vital capacity

  3. (3) - gills, (4) - tracheae, (5) - tidal volume

  4. (3) - tracheae, (4) - gills, (5) - tidal volume
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Prawn respires with gills (Branchial respiration) and insects respire by tracheae (Tracheal respiration).

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Mammalian lungs have an enormous number of minute alveoli (air sac);This is to allow

  1. more surface area for diffusion of gases

  2. more space for increasing the volume of inspired air

  3. more nerve supply to keep the lungs working

  4. more spongy texture for keeping lung in proper shape.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The number of alveoli in the human lungs has been estimated to be approximately 300 million. This enormous number of alveoli are meant to increase surface area of lungs for diffusion of gases.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

Rings of .................... present in trachea, bronchi and bronchioles prevent their collapse when air is not passing through them.

  1. Cartilage

  2. Collagen

  3. Bone

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In humans, trachea is a straight tube extending up to the mid-thoracic cavity, which divides at the level of 5th thoracic vertebra into a right and left primary bronchi. Each bronchi undergoes repeated divisions to form the secondary and tertiary bronchi and bronchioles ending up in very thin terminal bronchioles. The tracheae, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete cartilaginous rings.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

In respiration, air passes through

  1. $Pharynx \rightarrow nasal \:cavity \rightarrow larynx \rightarrow trachea \rightarrow bronchi \rightarrow bronchioles$
  2. $Nasal \:cavity\rightarrow Pharynx\rightarrow larynx \rightarrow trachea \rightarrow bronchi\rightarrow bronchioles$
  3. $Larynx \rightarrow nasal \:cavity\rightarrow Pharynx\rightarrow trachea$
  4. $Larynx \rightarrow pharynx \rightarrow trachea \rightarrow lungs$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nasal cavity open into pharynx which is common passage for transfer of food and air. Pharynx leads to larynx which is also called the voice box. Tracheae carry air to lungs and branch into left and right bronchus for entering left and right lungs. Inside lungs each bronchus divides and subdivides into terminal bronchioles.