Tag: breath and blood of life

Questions Related to breath and blood of life

State whether the following statements are true or false.
Forceful expiration results from a forceful contraction of diaphragm.

biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

  1. True

  2. False

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Correct Option: A
Explanation:
  • Forced expiration is an active process. It involves contraction of the abdominal muscles which forces the diaphragm upwards reducing the volume of the thoracic cavity. 
  • It also requires contraction of the internal intercostal muscles and innermost intercostal muscles which pull the ribs downwards. Both these actions contribute to a decreased thoracic volume and pressure is inversely proportional to volume. 
  • Therefore pressure within the lungs increases forcing the air out quicker than in normal expiration.
So, the correct option is 'True'.

Choose the correct answer from the alternatives given.
The respiratory medium flows unidirectionally ever the respiratory surface in the gas-exchange systems of:

biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

  1. mammals

  2. frogs

  3. birds

  4. insects

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Correct Option: C
Explanation:

In birds, the air sacs permit unidirectional flow of air through the lungs. Unidirectional flow means that air moving through bird lungs is largely 'fresh' air & has a higher oxygen content. So, the correct option is 'birds'.

Which of the following is correct

biology breath and blood of life human respiration the mechanism of breathing breathing and its movements

  1. The diaphragm contracts - volume of chest cavity increased

  2. The diaphragm contracts - volume of chest cavity decreased

  3. The diaphragm expands - volume of chest cavity increased

  4. The diaphragm expands - volume of chest cavity decreased

Show answer
Correct Option: A

The loss of water from the aerial parts of the plant is known as

botany breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. Photosynthesis

  2. Transpiration

  3. Reproduction

  4. Respiration

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Correct Option: B
Explanation:

Photosynthesis is the process of synthesis of food from inorganic compounds like carbon dioxide and water and sunlight.

Transpiration is the process of release of water vapour from aerial parts, such as leaves, stems and flowers.
Reproduction is the process of producing an offspring for continuation of species.
Respiration is the process of releasing energy by breaking down organic compounds like sugars.
So, the correct answer is 'Transpiration'.

Choose the correct answers from the alternatives given .
Which of the following is not one of the four most common elements found in living organisms?

biology breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. Hydrogen

  2. Carbon

  3. Sulphur

  4. Nitrogen

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Correct Option: C
Explanation:
The cells of living things are made mainly of four elements: carbon, hydrogen, oxygen and nitrogen. Phosphorus and calcium are next in abundance after these 4 elements. Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
So, the correct option is 'Sulphur'.

System of vessels and tubes in animals is called as

biology breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. Digestive system

  2. Circulatory system

  3. Respiratory system

  4. Reproductive system

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Correct Option: B
Explanation:

Human circulatory system, also called the blood vascular system consists of a muscular chambered heart, a network of closed branching blood vessels and blood, the fluid which is circulated. It is essentially a network of tubes that supplies to all living cells essential nutrients, O$ _2$ and other essential substances. Also, the waste or harmful substances produced are removed continuously for the healthy functioning of tissues.

Mark the incorrect statement

biology breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. Every organ in our body needs the involvement of circulating fluids.

  2. The digestive system absorb & digest nutrients.

  3. The respiratory system removes all extra water of the body.

  4. None of these

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Correct Option: C
Explanation:

Every organ in our body needs the involvement of circulating fluid. Ex - The digestive system digests & absorb nutrients which are needed to be transported to every cell in the body.

Only the multi cellular organisms require transporting mechanisms.

biology breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. True

  2. False

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Correct Option: B
Explanation:

Unicellular organisms also require transporting mechanism in order to transport nutrients, enzymes, waste products etc. The transport mechanism in unicellular organisms is simpler than multicellular organisms. Unicellular organisms can transport substances in and out of the body by diffusion and osmosis.

A transport system is needed to transport
(i) Nutrients, oxygen and hormones from the place, they are absorbed or received to the cells.
(ii) Waste products from the place they are formed to the place from where they are eliminated outside.
(iii) Heart beat, chromosome.

biology breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. (i) and (ii) correct

  2. (i) and (iii) correct

  3. (ii) and (iii) correct

  4. (i) , (ii) and (iii) correct

Show answer
Correct Option: A
Explanation:

The human transport system is a system of tubes with a pump and valves to ensure one-way blood flow. We need a transport system to deliver oxygen, nutrients, hormones and other substances to all our body cells and take away waste products from them. 

Heart of cockroach is a

biology breath and blood of life different types of circulatory systems stomata and transpiration transport in organisms

  1. Membranus

  2. Muscular and tube like

  3. Absent

  4. Filled with blood having RBC

Show answer
Correct Option: B
Explanation:

A) The heart is not membranous.

B) The heart is an elongated muscular tube lying along the mid-dorsal line of the thorax and abdomen.
C) A muscular heart with thirteen chambers is present.

D) The blood of cockroaches consists of clear colourless plasma and cells called haemocytes. RBCs are absent. The blood is devoid of any pigments.
So the correct answer is 'Muscular and tube like'.