Tag: circulatory system and organs

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Questions Related to circulatory system and organs

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.

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

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

  1. Pulmonary vein

  2. postcaval vein

  3. Precaval vein

  4. Posterior mesentric vein
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Arteries carry oxygenated blood,except

  1. Coronary artery

  2. Hepatic artery

  3. Aorta

  4. Pulmonary artery
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

Which of the following statement is true ?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vessels are multicellular structures formed by the fusion of several cells, and they have a relatively narrow lumen compared to the overall plant structure, though they are wider than tracheids.

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

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.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

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

  1. I and II only

  2. II and III only

  3. I, II and III only

  4. II and IV only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Squamous epithelium is a thin, flat layer of cells ideal for diffusion. It forms the inner lining of blood vessels (endothelium) and the alveoli of the lungs, where gas exchange occurs.

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

The only artery which carries deoxygenated blood is?

  1. Hepatic artery

  2. Pulmonary artery

  3. Aorta

  4. Renal artery
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Arteries normally carry oxygenated blood away from the heart, with the notable exception of the pulmonary artery. The pulmonary artery transports deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.

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

Choose the correct statement.

  1. More diameter in arteries

  2. Wall are thick in veins

  3. More blood pressure in arteries

  4. Valves present in arteries
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Arteries carry blood under high pressure directly pumped from the heart, requiring them to have thick, elastic walls. In contrast, veins have thinner walls, larger lumens, and valves to prevent backflow.

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

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?

  1. One

  2. Two

  3. Three

  4. Four
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A red blood cell in an artery supplying the right leg must first pass through the systemic capillary beds in the lower limb tissues to deliver oxygen. After returning through the systemic veins and right side of the heart, it is pumped through the pulmonary capillary beds in the lungs to get oxygenated before returning to the left atrium, totaling two capillary beds.

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

Which blood vessels have the smallest diameter?

  1. Capillaries

  2. Arterioles

  3. Venules

  4. Lymphatic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Capillaries are the smallest blood vessels in the body, with a diameter just large enough to allow red blood cells to pass through in single file. This small size facilitates the efficient exchange of gases, nutrients, and waste products.