Tag: biology

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

Which one is hypothetical coagulating factor?

  1. Accelerin

  2. Christmas factor

  3. Lakilovand factor

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

Accelerin (Factor VI) is considered a hypothetical or obsolete clotting factor, as it was later identified as activated Factor V (Factor Va). The other options are established, recognized coagulation factors.

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


The hepatic portal vein is located between the:-

  1. hepatic vein and the vena cava

  2. small intestine and the liver

  3. mouth and the stomach

  4. pancreas and the small intestine
Reveal answer Fill a bubble to check yourself
B Correct answer
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'

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

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

  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 $8000\ ml, c = 18 times, d = 7$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice hepatic portal system components of the circulatory system transport in animals the circulatory system biology

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

  1. Renal portal system in rabbit

  2. Hepatic portal system in rabbit

  3. Posterior vena cava in rabbit

  4. Dorsal aorta in rabbit
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Which one is not the use of hepatic portal system?

  1. To convert carbohydrate into glycogen.

  2. To separate ammonia.

  3. To kill bacteria.

  4. To convert protein into carbohydrate.
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

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

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

  1. Only A and B

  2. A, C and D

  3. B, C and D

  4. Only A and D
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 
Multiple choice biology nutrition and diet nutrients and foodstuffs introduction to nutrients nutrition and its deficiency simple test for nutrients test for nutrients

Which of the following is the function of nutrients?

  1. It regulates the growth and developement of the body.

  2. It helps in digestion.

  3. It helps in the energy production.

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

An essential nutrient is a nutrient that the body cannot synthesize on its own  or not to an adequate amount and must be provided by the diet. These nutrients are necessary for the body to function properly. The six essential nutrients include carbohydrates, protein, fat, vitamins, minerals and water. Carbohydrates are the main energy source for the brain. Protein is the major structural component of cells and is responsible for the building and repair of body tissues. Fat is an energy source that when consumed, increases the absorption of fat-soluble vitamins including vitamins A, D, E and K. 

So, the correct option is 'All of the above'.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

If a starved plant is provided with glucose the rate of respiration would

  1. Decrease

  2. Increase

  3. Become constant

  4. First rise than fall
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If a starved plant is provided with glucose, the rate of respiration would increase. It is because, carbohydrate is the primary respiratory substrate.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

The rate of respiration could be checked by

  1. Malonate
  2. $CO _2$

  3. Chloroform and cyanides

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

Respiration in plants is the process which enables the breakdown of  simple carbohydrates, like glucose into simpler substances thereby liberating carbon dioxide and energy. The factors that effect respiration are temperature, carbon dioxide concentration, water and light. The factor that inhibits or checks the rate of respiration in the mitochondria of plants include malonate, CO$ _2$ an chloroform and cyanides.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

When evolution of $CO _{2}$ is more than intake of oxygen?

  1. Sucrose is respaired

  2. Glucose is respaired

  3. Organic acids are respired

  4. Fats are respired
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The amount of oxygen is more in organic acids. Thus when respiration of organic acids takes place, the liberation of $CO _2$ is more. So, the R.Q of organic acid is more than one.