Tag: transport in animals

Questions Related to transport in animals

Which one is hypothetical coagulating factor?

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

  1. Accelerin

  2. Christmas factor

  3. Lakilovand factor

  4. Stuart factor.

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Correct Option: A


The hepatic portal vein is located between the:-

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

  1. hepatic vein and the vena cava

  2. small intestine and the liver

  3. mouth and the stomach

  4. pancreas and the small intestine

Show answer
Correct Option: B
Explanation:

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

So, the correct answer is 'small intestine and the liver'

__________ ml of oxygen is transported per deciliter of blood under normal conditions to tissues.

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

  1. $a = 9.8\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$

  2. $a = 5\ ml, b = 500\ ml, c = 12\ to \ 16, d = -3$

  3. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$

  4. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 18 times, d = 7$

Show answer
Correct Option: A

The circulatory system of a rabbit differs from that of a frog in that there 

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

  1. Renal portal system in rabbit

  2. Hepatic portal system in rabbit

  3. Posterior vena cava in rabbit

  4. Dorsal aorta in rabbit

Show answer
Correct Option: C
Explanation:
  • 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.

So, the correct answer is 'Posterior vena cava in rabbit'.

Which one is not the use of hepatic portal system?

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

  1. To convert carbohydrate into glycogen.

  2. To separate ammonia.

  3. To kill bacteria.

  4. To convert protein into carbohydrate.

Show answer
Correct Option: D
Explanation:

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.


Hence, the correct answer is 'To convert proteins into carbohydrates'

Which of the following pairs are correctly matched?
A. Crocodile 4-chambered heart
B. Sea Urchin Parapodia
C. Obelia Metagenesis
D. Lemur Thecodont

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

  1. Only A and B

  2. A, C and D

  3. B, C and D

  4. Only A and D

Show answer
Correct Option: A
Explanation:
  • 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. 

Purkinje system is spread in 

biology transport in animals cardiac cycle heart, blood vessels and cardiac cycle human heart

  1. Auricle myocardium

  2. Ventricle myocardium

  3. Both A and B

  4. None of the above

Show answer
Correct Option: B
Explanation:

Purkinje system is mainly present in the ventricle myocardium. They spread impulse in ventricles generated by the AV node.

So, the correct answer is option B.

'Bundle of His' is a network of

biology transport in animals cardiac cycle heart, blood vessels and cardiac cycle human heart

  1. Muscle fibres distributed throughout the heart walls

  2. Muscle fibres found only in the ventricle wall

  3. Nerve fibres distributed in ventricles

  4. Nerve fibres found throughout the heart

Show answer
Correct Option: B
Explanation:

'Bundle of His' is a network of muscle fibres, found in the walls of ventricles. They originate from AV node and further give rise to Purkinje fibres. This helps in maintaining the rhythmic contraction of the ventricles. 

The pace-setter in the heart is called as

biology transport in animals cardiac cycle heart, blood vessels and cardiac cycle human heart

  1. Purkinje fibres

  2. Sino-atrial node (SAN)

  3. Papillary muscle

  4. Atrio-ventricular node (AVN)

Show answer
Correct Option: D
Explanation:

The cardiac impulse is initiated in the sino-atrial node also known as natural pacemaker. It then travels to the atrio-ventricular node. From there through the Purkinje fibres to the ventricles. The atrio-ventricular node regulates the rhythm of the heart rate mainly. The delay in conduction of impulse in this node changes the duration of contraction between the atria and the ventricles. Hence AV node is called as the pace-setter.

Heart beat is accelerated by

biology transport in animals cardiac cycle heart, blood vessels and cardiac cycle human heart

  1. Sympathetic nerves and noradrenaline

  2. Cranial nerves and adrenaline

  3. Cranial nerves and acetylcholine

  4. Sympathetic nerves and acetylcholine

Show answer
Correct Option: A
Explanation:

A normal heart rate is 60 to 80 beats per minute. However, in certain conditions, the heart beat is accelerated. The major system involved in acceleration of heartbeat is sympathetic nervous system. It releases hormones like adrenaline and noradrenaline during stress or excitement. Exercise also stimulates sympathetic nervous system to accelerate the heartbeat. Apart from heartbeat, sympathetic nervous system and noradrenaline constricts blood vessels, goose bumps, sweating, increased blood pressure, dilation of pupil.

Thus, the correct answer is 'Sympathetic nerves and noradrenaline.'