Gas exchange in humans - class-XII
Description: gas exchange in humans | |
Number of Questions: 83 | |
Created by: Ratna Goswami | |
Tags: zoology human physiology biology breathing and respiration gas exchange in humans gas exchange and smoking breathing and exchange of gases |
Lungs made up of which structures
The lungs are protected by two membranes called ________
Read the following statements (A to D)
(A) Rib is a flat bone connected vertebral column and dorsally to the sternum.
(B) First seven pairs of ribs are called true ribs.
(C) 8$^{th}$ ,9$^{th}$ and 10$^{th}$ pairs of the ribs are called vertebro sternal ribs.
(D) 10$^{th}$ and 11$^{th}$ pairs of ribs are not connected dorsally and are therefore called floating ribs.
How many statements are correct?
What do the trachea and bronchi possess in their wall of the respiratory tract in man?
The mucus produced by the goblet cells
(I) Moistens the incoming air
(II) Traps the finest dust particles
(III) Filter out largest dust particles
(IV) Warm the incoming air
The alveoli contain specialized cells that secrete a phospholipoprotein complex known as pulmonary surfactant. The function of pulmonary surfactant is ________________________.
When there is no air in initial bronchioles, they do not collapse. It is due to the presence of _________________.
Trachea is supported by?
The capacity of lungs for air in a healthy man is
The alveoli in human lung are
Lingula structure originates from
Which of the following prevents collapsing of trachea?
Mammalian lungs are
Wall of alveoli is composed of
In nasal passage, the turbinal bones are present in which of the following groups?
Narrowest and most abundant tubes of lungs are
How are alveoli designed to maximize the exchange of gases?
Lungs have large number of narrow tubes called as
While eating, hiccups are because of
The narrowest and most numerous tubes of lungs are termed as
Consider the following statements A-D.
A. Epiglottis is the cartilaginous flap of skin which regulates the flow of air into the trachea.
B. Pleura is the ultimate region where in which the diffusion of air between the lungs and blood takes place.
C. Larynx is the voice box, which is the enlarged part of trachea.
D. "Adam's apple" is the protruding cartilage of the voice box of male humans.
The correct and wrong statements are given in
Breathing is affected by
Trachea branches to two thinner tubes called as
Which of the following bone structures protect the lungs in our body?
Identify the incorrect pair from the following.
Animals such as ............. have lungs in their chest cavities like human beings.
Which among the following statement is correct?
A. Normal breathing rate of a person is 15 to 18 times per minute.
B. Total area of gas exchange seen in the whole alveoli in two lungs is 36 to 72 square metre.
C. The total volume of air breathed in an out in the cycle of inhalation and exhalation is 500 ml.
D. Wind pipe is supported by rings of cartilage in order to avoid its collapse when there is lesser air in it.
Name the organ which divides to form bronchi.
Which of the following is not associated with respiratory system?
Which of the following eliminates carbon dioxide from the body?
Which of the following organ system involves in the exchange of gases with the environment?
The narrowest and most numerous tubes of lungs are termed as
Which features distinguish bronchioles from bronchi?
The diameter of the bronchioles often range from
Which of the following prevent collapsing of trachea?
Which animal has unpaired lungs
Mammalian lungs have numerous alveoli for.
One of the following is a difference between pulmonary respiration of frog and human.
Lungs have a large number of narrow tubes called.
In mammals ventilation movements of lungs are governed by.
Number of alveoli in the two human lungs is?
Lungs have a large number of alveoli for.
Air is breathed through.
Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is?
Residual air mostly occurs in.
Trachea is lined with incomplete rings of
Gases diffuse over the respiratory surface because of.
Arrange the following in order of increasing volume.
$1$. Tida. volume $2$. Residual volume $3$. Expiratory reserve volume $4$. Vital capacity.
According to Boyle's law, the product of pressure and volume is constant, hence.
Which one has the smallest diameter?
Wind pipr arises from.
Alveoli occur in.
Surfactant is?
Which structure of lungs is directly involved in $O _2/ CO _2$ exchange between air and blood capillaries?
Inner surface of bronchi, bronchioles and fallopian tubes is lined by.
Lung alveoli are characterised by.
Bronchial respiration occurs with the help of.
Partial pressures of oxygen and carbon dioxide in healthy human lung alveoli are respectively about.
Which one is the first to receive lymphatic duct from lungs
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because ____________________.
Number of alveoli present in human lungs is?
The ultimate end parts of the respiratory system in humans are known as
During respiration, exchange of gases take place in
Choose the correct answer from the alternatives given.
What are the two large branches of the airway which lead off the trachea at the tracheal bifurcation?
Choose the correct answer from the alternatives given.
Site of gaseous exchange in lungs is:
Choose the correct answer from the alternatives given.
The is an airway that connects the nose and mouth with the
Choose the correct answer from the alternatives given.
Which of the following constitutes the wind pipe, or the upper four inches of the airway?
State whether the following statements are true or false.
Lungs are completely emptied and refilled with fresh air during breathing.
Choose the correct answer from the alternatives given.
In human lungs, gas exchange occurs at the
State whether the following statements are true or false.
Gas exchanges continue uninterrupted in lungs even after a forceful expiration.
Choose the correct answer from the alternatives given.
Simple squamous non-ciliated epithelium is found in
Lungs are enclosed in
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.
Mammalian lungs have an enormous number of minute alveoli (air sac);This is to allow
Rings of .................... present in trachea, bronchi and bronchioles prevent their collapse when air is not passing through them.
In respiration, air passes through
In humans the alveoli are the functioning units of external respiration.
Where does exchange of gases ($O _2$ and $CO _2$) take place in our lungs?
Read the given statements and choose correct answer :-
(i) Initial bronchioles are supported by incomplete cartilagenous rings.
(ii) In human lungs are solid and spongy.
(iii) Alveoli wall contains simple squamous epithelium and white fibrous connective tissue (iv) Lungs are covered by a single layered pleura
The area of inner surface of bronchiole is
Which of the following structures is NOT supported by incomplete cartilaginous rings?
Respiratory structures in insects are called as
The narrowest and most numerous tubes of lungs are called as