Tag: transportation in living organisms

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Questions Related to transportation in living organisms

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

Which of the following chairs of haemoglobin is affected in thalassaemia?

  1. Only $\beta$ chain
  2. Only $\alpha$ chain
  3. Both $\alpha$ and $\beta$ chain
  4. $\gamma$ chain
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Thalassaemia is a group of inherited blood disorders characterized by reduced synthesis of either the alpha or beta globin chains of haemoglobin, leading to abnormal haemoglobin production.

Multiple choice evs transportation in living organisms blood in humans circulatory system - blood basics of blood and heart

Choose the correct answer from the alternatives given.
Which of the following are components of blood?

  1. Plasma

  2. Blood cells and platelets

  3. Gases and other dissolved substances

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The composition of blood is :
1. Blood plasma- 54.3% It contains proteins, amino acids, nitrogenous wastes, nutrients, gases, electrolytes.
2. Red Blood Cells-45%
3. White Blood Cells- 0.7 %
4. Platelets
So, the correct option is 'All of the above'.
Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

In which of the following points pulmonary artery is different from pulmonary vein?

  1. Its lumen is broad.

  2. Its wall is thick.

  3. It has valves.

  4. It does not possess endothelium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The pulmonary artery carries deoxygenated blood from the heart to the lungs while the pulmonary vein carries oxygenated blood from the lungs to the heart. A pulmonary artery has a smaller lumen and thicker walls as compared to a pulmonary vein.
Thus, the correct answer is 'Its wall is thick.'
Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

Given below are four statements (i-iv) regarding human blood circulatory system.
i. Arteries are thick-walled and have narrow lumen as compared to veins.
ii. Angina is acute chest pain when the blood circulation to the brain is reduced.
iii. Persons with blood group AB can donate blood to. any person with any blood group under ABO system.
iv. Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?

  1. i and iv

  2. i and ii

  3. ii and iii

  4. iii and iv
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

i. Arteries have thick, elastic walls and narrow lumen while veins have thinner, scarcely elastic walls and wide lumen.

ii. Angina Pectoris is a pain in the chest due to deprived oxygen the heart muscle experience constricting pain. This is not a fatal condition and the pain passes off quickly.
iii. Persons with blood group AB is a universal recipients. It has both the antigens A and B but no bodies.
iv.  During clot, Thromboplastin helps in the formation of an enzyme prothrombinase. This enzyme inactivates heparin and it also converts the inactive plasma protein prothrombin into its active form, thrombin. Both changes require calcium ions.
So, the correct answer is 'i and iv'.

Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

Which of the following statements is incorrect?

  1. Veins are typically larger in diameter than arteries.

  2. Because of their small size, blood flows more rapidly in capillaries than in other parts of circulatory system.

  3. Walls of arteries are elastic enabling them to stretch and shrink during changes in blood pressure.

  4. Veins contain more blood than any other part of circulatory system.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A. Arteries have thick, elastic walls and narrow lumen while veins have thinner, scarcely elastic walls and wide lumen.

B. Arteries branch out into smaller and thinner blood vessels called arterioles. these divide into still smaller vessels to provide blood to all the cells. The thinnest blood vessels are called capillaries. The flow of blood is very slow in capillaries.
C. The walls of arteries are a muscular and elastic coat. It consists of unstriated muscle fibres with some yellow elastic fibres are arranged in a circular manner. It holds the blood vessel open. This layer determines the amount of supply of blood to an organ and it maintains the blood pressure.
D. Veins bring back blood from the tissues and organs to the heart. The blood in veins flows under less pressure than that in arteries. Therefore, veins can accommodate more blood.
So, the correct answer is 'Because of their small size, blood flows rapidly in capillaries than in other parts of circulatory system'.

Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

State the following statement true or false:


Arteries have openings

  1. True

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

Arteries do not have openings, while openings present in veins are called as valves. Blood after being pumped into arteries are under higher pressure than blood flowing in veins so to prevent backward flow of blood in veins valves are present.  Valves in veins also aid in the return of blood from the extremities to the heart.

So the correct answer is 'False'.

Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

Splenic artery arises from?

  1. Anterior mesenteric artery

  2. Coeliac artery

  3. Posterior mesenteric artery

  4. Intestinal artery
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The splenic artery  is the blood vessel that supplies oxygenated blood to the spleen. It branches from the celiac artery, and follows a course superior to the pancreas. It supplies oxygenated blood to the arteries.
So, the correct option is 'Coeliac artery'.
Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

In mammals, veins differ from arteries in having

  1. Thicker walls

  2. Deeply present

  3. Carry blood away from heart

  4. Internal valves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Veins carry deoxygenated blood (with the exception of pulmonary veins and umbilical vein) from different parts of the body to the heart. They have thin, elastic muscle layer with semilunar valves that prevent the blood from flowing in the opposite direction. 

So, the correct answer is option D.