Respiratory system: the organ system - class-VII
The trachea is prevented from collapsing by
Which of the following correctly illustrates the passage of oxygen in the respiratory system?
The short tube leading from the nose is
Diaphragm is
Air goes from pharynx to.
Bronchi divide into
Major part of $CO _2$ is transported to respiratory surface as.
Respiratory system is derived from.
What is correct about human respiration?
Hypophysial portal system is present in
Direct respiration occurs in.
Which is not function of 'conductiing part' of respiratory system?
Choose the correct statements with regard to human respiration:
(a) Inspiration is faciliated by contraction of phrenic and internal intercostal muscles
(b) Healthy human can inhale or exhale about $2000-3000$ml of air/min
(c) Functional residual capacity represents the volume of left out air in lungs after expiration
(d) Total lung capacity is the total volume of air that would be accomodated in the lunds after forced inspiration.
Respiratory quotient for three different substrates was calculated and tubulated as shown here.
Substrate | R.Q. |
---|---|
XYZ | 0.911.3 |
Identify X, Y and Z and select the correct option regarding them.
The exchange of respiratory gases with the blood occurs at.
In lungs, a respiratory bronchiole divides to form.
Which is the end part of pulmonary or lung division and place of gaseous exchange?
Oxygen and carbon dioxide concentration in the alveolar air is respectively.
Inner/alveolar surface area of human lungs is?
Approximate normal composition of alveolar air is?
What is correct?
Complete and balance the following equation $Na _2HPO _4+X\rightarrow Y+NaH _2PO _4$.
The partial pressure of oxygen in the alveoli of lungs is?
Choose the correct answer from the alternatives given.
What are the tiny clusters of chambers for diffusion of gases in lungs?
What is the approximate normal composition of alveolar air?
Membrane separating air in pulmonary alveoli from blood capillaries.
Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?
Read the given statements and select the correct option.
Statement 1 : Mammals can eat while breathing.
Statement 2 : Mammals have negative-pressure breathing.
Given below is a list of different steps (i-vi) involved in respiration.
(i) Utilisation of $O _2$ by the cells for catabolic reactions
(ii) Transport of gases by the blood
(iii) Pulmonary ventilation by which atmospheric air is drawn in and $CO _2$ is released out
(iv) Release of resultant $CO _2$
(v) Diffusion of $O _2$ and $CO _2$ between blood and tissues
(vi) Diffusion of gases ($O _2$ and $CO _2$) across alveolar tissues.
Select an option which has correct sequence of all the steps.
Consider the following statements each with two blanks.
(i) Diaphragm contracts to help in __(1) while the contraction of abdominal muscles helps in (2).
(ii). Vital capacity of trained athletes is _(3)__ than that of non-athletes while the vital capacity of non-smokers is (4) than that of smokers.
(iii) Alveolar P$O {2}$ is _(5) than the venous P$O {2}$ while arterial P$O _{2}$ is __(6)_ than the alveolar P$O _{2}$.
Which of the following options gives the correct fill ups for the respective blanks numbers from (1) to (6) in the above statements?
Complete the following sentence by selecting the correct option.
The breathing rhythm is generated in the (i) and is influenced by variation in levels of (ii)_ in the blood.
The most important muscular structure in respiratory system of rabbit is
Thoracic cavity is enlarged by contraction of
Lungs ventilation movements is due to
Hiccough (hiccup) is due to activity of
Which of the following structures are responsible for breathing process?
The exhaled air mainly contains
Rita breathes out on a mirror and finds water droplets on it. This activity helps to conclude the fact that
In mammals, the body cavity is partitioned into thoracic and abdominal parts by.
Forced deep breathing during rest for some time is followed by temporary stoppage of breathing because of.
To generate pressure gradients for faciliatating expiration and inspiration, the human body uses the intercostal muscles and.
Increase in $CO _2$ concentration shall cause.
Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
Read the following statements:
(A) Nasal chamber opens into nasopharynx which is a portion of pharynx
(B) Larynx produces sound during inspiration as well as expiration
(C) During swallowing gullet can be covered by a thin elastic cartilagenous flap called epiglottis
(D) Trachea is get divided at the level of the 6th thoracic vertebra into right and left primary bronchi.
(E) The braching network of bronchi, bronchioles and alveoli comprise the lungs.
How many statements are not correct-
During inspiration muscles of diaphragm
How much an average man breathe per day?
Which of the following changes occur in diaphragm and intercoastal muscles when expiration of air takes place?
The respiratory centre leading to faster breathing is on account of ________________.