Tag: the circulatory system
Questions Related to the circulatory system
Which one is hypothetical coagulating factor?
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Accelerin
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Christmas factor
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Lakilovand factor
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Stuart factor.
The hepatic portal vein is located between the:-
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hepatic vein and the vena cava
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small intestine and the liver
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mouth and the stomach
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pancreas and the small intestine
Measuring approximately 8 cm (3 inches) in adults, the portal vein is located in the right upper quadrant of the abdomen, originating behind the neck of the pancreas. In most individuals, the portal vein is formed by the union of the superior mesenteric vein and the splenic vein
__________ ml of oxygen is transported per deciliter of blood under normal conditions to tissues.
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$a = 9.8\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$
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$a = 5\ ml, b = 500\ ml, c = 12\ to \ 16, d = -3$
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$a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$
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$a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 18 times, d = 7$
The circulatory system of a rabbit differs from that of a frog in that there
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Renal portal system in rabbit
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Hepatic portal system in rabbit
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Posterior vena cava in rabbit
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Dorsal aorta in rabbit
- The renal portal system is absent in the rabbit. The hepatic portal system is present in rabbit and it consists of a hepatic portal vein ventral to the post caval vein. It enters into the liver, divides into a number of branches to supply to various lobes of the liver.
- In the rabbit, the blood from different organs of the body is collected by two superior vena cavae and a posterior vena cava which open separately into the right auricle.
- In Frog, the blood from different organs of the body is collected by two precavals and one post caval which unite together to form a sinus venosus that in turn opens into the right auricle.
Which one is not the use of hepatic portal system?
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To convert carbohydrate into glycogen.
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To separate ammonia.
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To kill bacteria.
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To convert protein into carbohydrate.
The hepatic portal system is the system of blood vessels that connect the gastrointestinal system and the liver. The nutrients digested by the intestines are transported to the liver, where the excess of carbohydrates is converted into glycogen. The amino acids are broken down and ammonia is released, which is soon converted to urea through the Ornithine cycle. The liver has Kupffer cells that kill the bacteria before the nutrients move out to the different organs of the body.
Which of the following pairs are correctly matched?
A. Crocodile 4-chambered heart
B. Sea Urchin Parapodia
C. Obelia Metagenesis
D. Lemur Thecodont
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Only A and B
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A, C and D
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B, C and D
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Only A and D
- Reptiles have two chambered heart accept crocodiles which have four chambered heart.
- In obilia alternation of generation is called metagenesis in which an asezual polyploid generation appears to alternate regularly with a sexual medusoid generation.
- Thecodont dentition is found in mammals.
- So, (D) is the correct answer.
Pacemaker is situated in the
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Wall of right atrium
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Interauricular septum
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Interventricular septum
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Wall of left atrium
The pacemaker of heart is
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Foramen ovale
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Sinoatrial node
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Ductus arteriosus
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Bundle of His
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Vagus nerve
Electrical impulses from the heart muscle cause your heart to beat (contract). This electrical signal begins in the sinoatrial (SA) node, located at the top of the heart's upper-right chamber (the right atrium). The SA node is sometimes called the heart's“natural pacemaker.”
Rate of heart beat is determined by
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Purkinje fibres
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Papillary muscles
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AV-node
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SA-node
The heart beat is initiated and regulated by nodal tissue made of specialised cardiac muscles called
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Spongy tissue
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Purkinje tissue
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Alveolar tissue
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None of these
Purkinje tissue is influenced by electrical discharge from the sinoatrial node. During the ventricular contraction portion of the cardiac cycle, the Purkinje fibres carry the contraction impulse from both the left and right bundle branch to the myocardium of the ventricles. In this way these fibres control and initiate heart beat.