Tag: components of the circulatory system

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Questions Related to components of the circulatory system

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Which of the following vessel in rabbit starts with capillaries and ends in capillaries?

  1. Pulmonary artery

  2. Renal vein

  3. Hepatic portal vein

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

The hepatic portal system includes the veins that drain blood from capillaries in the spleen, stomach, pancreas, and intestine. Instead of emptying their blood directly into the inferior vena cava, they deliver it by way of the hepatic portal vein to the liver. Upon entering the liver, the portal vein divides and sub-divides into ever smaller branches. Eventually, the portal blood flows into a vast network of sinus like vessels called sinusoids. These are enlarged capillaries that serve as blood channels within the tissues of the liver, spleen, thyroid gland, and other structures. After leaving the sinusoids, blood is finally collected by the hepatic veins, which empty into the inferior vena cava. 

So, the correct answer is option C.

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Hepatic portal system connects

  1. Digestive system to liver.

  2. Kidney to liver.

  3. Liver to digestive system.

  4. Liver to kidney.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The venous system comprising of the hepatic portal vein and other veins. It is responsible for directing blood from the region of the gastrointestinal tract between the esophagus and rectum and also includes venous drainage from the supplementary organs such as the spleen to the liver. The hepatic system is so named since it connects capillaries of the intestine and other digestive organs to modified capillaries (hepatic sinusoids) of the liver. As intestinal blood is nutrient rich for few hours after having a meal, this system is able to detect available nutrients before the blood goes to rest of the body. It also plays the role in cleansing the blood by removing the bacteria and toxins present in it. Thus, the correct answer is option A.
Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Mark the correct statement about lymph.

  1. It Maintains the volume of blood.

  2. It destroys the invading microbes.

  3. Both A and B are true for lymph

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lymph acts as middle man which transports food materials, oxygen, hormones etc. to the body cells and brings carbon dioxide and other metabolic wastes from the body cells to blood and then finally pours the same into venous system. It destroys the invading germs and it maintains the volume of blood.

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

The veins starting from the stomach and intestines do not directly convert the blood to the posterior vena cava. Instead, they first enter the ........... as a combined hepatic portal vein.

  1. Kidney

  2. Pancreas

  3. Spleen

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

The hepatic portal vein carries blood from the spleen and intestines into the liver. The veins from the spleen and intestines break into capillaries before entering the liver as the hepatic portal vein. 

So, the correct answer is option C.

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Which of the following is an example of portal vein?

  1. Renal portal vein

  2. Hepatic portal vein

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The hepatic portal vein carries blood from the spleen and intestines into the liver. The veins from the spleen and intestines break into capillaries before entering the liver as the hepatic portal vein.

The renal portal vein is involved in the movement of the blood from the renal glomeruli to the peritubular plexus that surround the proximal and distal convoluted tubules.
So, the correct answer is option C.

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Artificial pacemaker is implanted subcutaneously for correcting

  1. 90% blockage of coronary arteries

  2. High blood pressure

  3. Arteriosclerosis

  4. Irregularity of heart rhythm.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An artificial pacemaker is a medical device used to regulate the heart's electrical impulses, specifically treating conditions like bradycardia or heart block where the heart rhythm is irregular or too slow.

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

A portal system is one in which

  1. A vein starts from an organ and ends up in heart.

  2. A vein starts from an organ and ends up in another organ.

  3. A vein starts from heart and ends up in lungs.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
There are two types of portal systems they are Hepatic portal systems and renal portal system. In Hepatic (liver) portal system a vein collects blood from the intestine and passes it to the liver and in renal (kidney) portal system a vein collects blood from renal glomeruli and passes it to peritubular plexus (the blood capillaries that surrounds the proximal and distal convoluted tubules). Both hepatic and renal portal systems are found in fishes, amphibians, and reptiles. In mammals only hepatic portal system is present. Hence A portal system is one in which A vein starts from an organ and ends up in another organ.
So, the correct answer is 'A vein starts from an organ and ends up in another organ'.
Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Both hepatic and renal portal systems are found in

  1. Fishes, amphibians, reptiles

  2. Amphibians, reptiles, mammals

  3. Reptiles, aves, mammals

  4. Cyclotomes, fishes, amphibians
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hepatic (liver) portal system collects blood from the intestine and passes it to the liver and renal (kidney) portal system collects blood from renal glomeruli and passes it to peritubular plexus (the blood capillaries that surrounds the proximal and distal convoluted tubules). Both hepatic and renal portal systems are found in fishes, amphibians and reptiles. In mammals only hepatic portal system is present.

So, the correct answer is 'Fishes, amphibians and reptiles'.

Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

Valve surrounding opening of coronary sinus is

  1. Thebesius valve

  2. Eustachian valve

  3. Mitral valve

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

The Thebesius valve (valve of Thebesius) is a semilunar fold of the lining membrane of the right atrium that guards the opening of the coronary sinus. The Eustachian valve guards the inferior vena cava, while mitral and semilunar valves are located in the heart chambers and great vessels respectively.