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State the factors that affect the rate of diffusion.
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State the factors that affect the rate of diffusion.

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Updated on: Mar 31, 2023

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CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Rate of diffusion is affected by the concentration gradient, membrane permeability, temperature and pressure. It will take place as long as the difference between the concentrations of substances across a barrier are maintained. Membrane permeability also affects the rate of diffusion. It increases with an increase in membrane permeability. Changes in temperatue and pressure also affect the rate of diffusion.
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Practice questions from CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

Question 1
Easy
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Views: 5,376

Over the entire body surface, exchange with by simple diffusion occurs in
  1. sponges
  2. coelenterates
  3. flatworms
  4. All of these
Topic

Topic:

Breathing and Exchange of Gases

Book

Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

View solution

Question 2
Easy
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Views: 5,828

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
  1. there is negative pressure in the lungs
  2. there is negative intrapleural pressure pulling at the lung walls
  3. there is positive intrapleural pressure
  4. pressure in the lungs is higher than the atmospheric pressure
Topic

Topic:

Breathing and Exchange of Gases

Book

Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

View 11 solutions

Question 3
Easy
Views

Views: 5,523

Read the following passage and answer the questions that follows.
The human respiratory system consists of a pair of lungs and a series of air passages which lead to lungs. The entire respiratory tract consists of nose, pharynx, larynx, trachea, bronchi and bronchioles. When air passes through the nose, it is warmed, moistened and filtered. Hair present in the nose filter out particles in the incoming air. The air is moistened by the mucus present in the nose and gets warmed by the blood that flows through the capillaries. Behind the nose, lies the pharynx with two passages, one for food and the other for air. The passage continues from pharynx to larynx and the opening that leads to larynx is called glottis, it is covered by epiglottis which prevents food from entering the passage to lungs. The total surface area through which gaseous exchange takes place can be about a hundred times that of the body.
Which portion of the human respiratory system is called the sound box?
  1. Larynx
  2. Trachea
  3. Nasopharynx
  4. Glottis
Topic

Topic:

Breathing and Exchange of Gases

Book

Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

View 3 solutions

Question 4
Medium
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Views: 5,258

Fill in the blanks.
(i) During normal quiet breathing, on an average, approximately....... of air is inspired or expired in each breathe, termed as.......
(ii) Actually, only about....... of air enters the lung alveoli for the exchange of gases. The remaining fills the respiratory passage and is termed .........
(iii) Diaphragm contracts to helps in ........while the contraction of abdominal muscles help in ........ .
(iv) Alveolar is ......than the venous in lungs, while arterial is....... than the alveolar .
Topic

Topic:

Breathing and Exchange of Gases

Book

Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Practice more questions from Breathing and Exchange of Gases

Question 1
Easy
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Consider the following statements.
I. The percentage of haemoglobin that is bound with haemoglobin is called per cent saturation of haemoglobin.
II. Every of oxygenated blood can deliver to the tissues under normal conditions.
III. value is the value of at which is saturated with oxygen.
IV. Unlike haemoglobin, myoglobin has three polypeptide chains.
Choose the option containing incorrect statements.
  1. I and III
  2. II and IV
  3. III and IV
  4. I and II
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Breathing and Exchange of Gases

Book

Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Question 2
Medium
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Views: 6,296

Identify A to E in the given diagram and choose the correct option accordingly
  1. A-Alveolus, B-Pulmonary artery, C-Pulmonary vein, D-Systemic vein, E-Systemic arteries
  2. A-Alveolus, B-Pulmonary vein, C-Pulmonary artery, D-Systemic vein, E-Systemic arteries
  3. A-Alveolus, B-Pulmonary vein, C-Pulmonary artery, D-Systemic arteries, E-Systemic vein
  4. A-Alveolus, B-Pulmonary vein, C-Pulmonary artery, D-Systemic arteries, E-Portal vein
Topic

Topic:

Breathing and Exchange of Gases

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Question 3
Easy
Views

Views: 5,818

The diabetic patient shows:
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  3. Zero respiratory quotient
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Topic

Topic:

Breathing and Exchange of Gases

Book

Book:

Precalculus

View solution

Question 4
Hard
Views

Views: 5,821

Assertion: Tracheae, primary, secondary and tertiary bronchi are supported by incomplete cartilaginous rings.
Reason: These rings of cartilage make the wall non-collapsible.
  1. If both Assertion and Reason are true and Reason is the correct explanation of Assertion
  2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. If Assertion is true but Reason is false.
  4. If both Assertion and Reason are false.
Topic

Topic:

Breathing and Exchange of Gases

Book

Book:

NEET Question Bank i Biology for AIIMS (Disha)

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Nucleus Nucleus as a cell organelle was first described by Robert Brown as early as 1831. Later, the material ef the nucleus stained by the basic dyes was given the name chromatin by Flemming (1879). Nucleus is a relatively large organelle controlling all the activities of the eukaryotic cells. Some cells haves more than one nucleus, e.g., binucleate cells have two nuclei per cell (Paramoecium), while multinucleate) ones have many nuclei, e.g. Opalina. However, some cells lack nucleus (anucleate) at maturity, such as, mammalian RBCs and sieve tube cells. Fig. : Structure of a Nucleus
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Question Text
State the factors that affect the rate of diffusion.
Updated OnMar 31, 2023
TopicBreathing and Exchange of Gases
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 2
Upvotes356
Avg. Video Duration2 min