Tag: transportation in living organisms

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Questions Related to transportation in living organisms

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

Which of the following has least urea?

  1. Pulmonary vein

  2. Hepatic portal vein

  3. Hepatic vein

  4. Renal vein.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The renal vein carries blood away from the kidneys after it has been filtered. Since the kidneys remove urea from the blood, the renal vein contains the lowest concentration of urea compared to other major vessels.

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

Adventitia is outermost coat of.

  1. Stomach

  2. Intestine

  3. Rectum

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

The tunica adventitia (or tunica externa) is the outermost connective tissue layer of blood vessels, particularly arteries and veins. While other organs have outer layers, the term is most characteristically associated with the histology of blood vessels.

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

Maximum amount of oxygen is lost from blood in.

  1. Arteries of body

  2. Capillaries surrounding the alveoli

  3. Left auricle of heart

  4. Capillaries surrounding the tissues
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oxygen is delivered to body tissues through systemic capillaries. As blood passes through these capillaries, oxygen dissociates from hemoglobin and diffuses into the cells, resulting in a significant loss of oxygen from the blood.

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

The main difference between artery and vein is?

  1. In artery, muscular coat is thick

  2. In artery, valves are absent

  3. In artery, blood flow is jerky

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Arteries have thicker muscular walls to handle high pressure, lack valves (except at the heart exit), and exhibit pulsatile (jerky) flow. Since all these statements accurately describe differences between arteries and veins, D is the correct choice.

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

Blood capillaries are made of

  1. Endothelium, connective tissue and muscle fibres

  2. Endothelium and muscle fibres

  3. Endothelium and connective tissue

  4. Endothelium only.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blood capillaries are composed of a single layer of endothelial cells resting on a basement membrane. They lack the smooth muscle and connective tissue layers found in larger blood vessels to facilitate rapid diffusion.

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

Wall of blood capillary is formed of

  1. Haemocytes

  2. Parietal cells

  3. Endothelial cells

  4. Oxyntic cells.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The wall of a blood capillary is extremely thin, consisting only of a single layer of squamous endothelial cells. This structure is essential for the efficient exchange of substances between blood and tissues.

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

Splenic entry 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, which supplies the spleen, is one of the three main branches of the coeliac artery (or celiac trunk). The other branches are the left gastric artery and the common hepatic artery.

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

A vein that breaks up into capillaries is

  1. Pelvic vein

  2. Pulmonary vein

  3. Renal vein

  4. Hepatic portal vein.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The hepatic portal vein is unique because it carries blood from the digestive organs to the liver, where it breaks up into a second capillary bed (sinusoids). This allows the liver to process nutrients and toxins absorbed from the gut.

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

Carotid artery carries

  1. Impure blood to brain

  2. Oxygenated blood to brain

  3. Impure blood to kidneys

  4. Oxygenated blood to heart.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The carotid arteries are major blood vessels in the neck that supply oxygenated blood to the brain, neck, and face. They are essential for maintaining cerebral perfusion.

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

Which blood vessel has the largest amount of urea?

  1. Renal vein

  2. Hepatic vein

  3. Hepatic portal vein

  4. Dorsal aorta/renal artery.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The hepatic vein carries blood away from the liver. Since the liver is the site of urea production (via the urea cycle), the blood in the hepatic vein has a high concentration of urea compared to blood entering the liver.