Tag: transportation in living organisms

Questions Related to transportation in living organisms

The vein that does not directly open into the heart is:

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

  1. Pulmonary vein

  2. postcaval vein

  3. Precaval vein

  4. Posterior mesentric vein

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Correct Option: D
Explanation:

  • The pulmonary vein opens directly into the left atrium while postcaval and precaval veins into the right atrium.
  • The posterior mesenteric vein is a blood vessel that drains blood from the small intestine (jejunum and ileum). At its termination behind the neck of the pancreas, it combines with the splenic vein to form the hepatic portal vein and hence does not open into the heart.
So, the correct option is 'Posterior mesenteric vein'.

Arteries carry oxygenated blood,except

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

  1. Coronary artery

  2. Hepatic artery

  3. Aorta

  4. Pulmonary artery

Show answer
Correct Option: D
Explanation:
  • Arteries carry oxygenated blood away from the heart to the tissues, except for pulmonary arteries, which carry blood to the lungs for oxygenation (usually veins carry deoxygenated blood to the heart but the pulmonary veins carry oxygenated blood as well).

So, the correct answer is 'Pulmonary artery'.

Which of the following statement is true ?

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

  1. Vessels are multicellular with narrow lumen

  2. Tracheids are multicellular with narrow lumen

  3. vessels are unicellular with narrow lumen

  4. Tracheids are unicellular with wide lumen

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Correct Option: A

State the true statements of the following:
$(1)$ Flowing blood in arteries is without high pressure.
$(2)$ Blood flowing in veins is without pressure.
$(3)$ Veins have valves opening towards heart.
$(4)$ Arteries have valves opening towards heart.

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

  1. $1$ and $3$ statements are true

  2. $1$ and $4$ statements are true

  3. $2$ and $3$ statements are true

  4. $1$ and $4$ statements are true

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Correct Option: A

Squamous epithelium forms inner lining of which of the following?
I. Blood vessels
II. Lung alveoli
III. Salivary duct

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

  1. I and II only

  2. II and III only

  3. I, II and III only

  4. II and IV only

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Correct Option: A

The only artery which carries deoxygenated blood is?

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

  1. Hepatic artery

  2. Pulmonary artery

  3. Aorta

  4. Renal artery

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Correct Option: A

Choose the correct statement.

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

  1. More diameter in arteries

  2. Wall are thick in veins

  3. More blood pressure in arteries

  4. Valves present in arteries

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Correct Option: A

A red blood cell is located in the artery supplying to right leg, how many capillary beds must this cell pass through before it is returned to the left atria?

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

  1. One

  2. Two

  3. Three

  4. Four

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Correct Option: A

Which blood vessels have the smallest diameter?

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

  1. Capillaries

  2. Arterioles

  3. Venules

  4. Lymphatic

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Correct Option: A

A vein differ from an artery in having

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

  1. Strong muscular walls

  2. Narrow lumen

  3. Valves that control direction of blood flow opposite to heart

  4. Valves that control direction of blood flow towards heart

Show answer
Correct Option: C
Explanation:

Veins drain capillaries in the tissues and organs and return the blood to the heart. Veins have a unique structural feature which is not present in arteries. They are equipped with one way valves, that prevent the back flow of blood.