Tag: busy at work - our internal organs

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Questions Related to busy at work - our internal organs

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

Ptyalin cannot work in stomach, because it be comes _____________.

  1. Inactive due to HCl

  2. Inactive due to Renin

  3. Inactive due to Pepsin

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

Ptyalin (salivary amylase) functions in an alkaline or neutral environment. When it reaches the stomach, the highly acidic environment created by HCl denatures the enzyme, rendering it inactive.

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

During cellulose fermentation by anaerobic bacteria in rumen and reticulum, cellulose is mainly changed into.

  1. $CO _2$

  2. Ethyl alcohol

  3. Lactic acid

  4. Volatile fatty acids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cellulose is broken down to short chain fatty acids in ruminants ,during cellulose fermentation by anaerobic bacteria.

Correct answer-D

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs


Which of the following animals has compound stomach (rumen)?

  1. dog

  2. rat

  3. horse

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

Ruminants include cattle, sheep, goats, buffalo. These animals all have a digestive system that is uniquely different from our own. Instead of one compartment to the stomach, they have four. Of the four compartments, the rumen is the largest section and the main digestive center

So, the correct answer is 'Cow'

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

Which of the following is the stomach part in which herbivores secretes the grass which is swallowed quickly? 

  1. Lumen

  2. Pyloric

  3. Rumen

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

Vertebrates lack the ability to hydrolyse the beta glycosidic bond of plant cellulose due to the lack of the enzyme cellulase. Thus, ruminants must completely depend on the microbial flora, present in the rumen or hindgut, to digest cellulose. Digestion of food in the rumen is primarily carried out by the rumen microflora. Since, the environment inside a rumen is anaerobic, most of these microbial species are obligate or facultative anaerobes that can decompose complex plant material, such as cellulose, hemicellulose, starch, and proteins. As bacteria conduct fermentation in the rumen, they consume approximately 10% of the carbon, 60% of the phosphorus, and 80% of the nitrogen that the ruminant ingests. To reclaim these nutrients, the ruminant then digests the bacteria in the abomasum. The enzyme lysozyme has adapted to facilitate digestion of bacteria in the ruminant abomasum. Pancreatic ribonuclease also degrades bacterial RNA in the ruminant small intestine as a source of nitrogen. 

Therefore, the correct answer is option C.

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

Grass is rich in the substance called as

  1. Amino acid

  2. Fatty acid

  3. Cellulose

  4. Pepsin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The grass is a bulb plant. The cell wall of grass leaves is made of cellulose. Cellulose is stored food substance in plants and it is typically the most abundant constituent by mass in the grass.
So, the correct answer is 'Cellulose'.
Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

The partially digested food in the stomach of ruminants is called as

  1. Bud

  2. Cud

  3. Ruminant

  4. Rumen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Rumination is also called second chewing. 
  • Ruminant stomach: The stomach of a ruminant is divided into four chambers – the rumen, reticulum, omasum and abomasum. 
  • The process of digestion is as follows: The food is chewed and swallowed quickly and passed into the first stomach called Rumen. The microorganisms help in breaking down the food. Digestive juices of the rumen partially digest the food. The partially digested food in the rumen is called cud. Hence, The partially digested food in the stomach of ruminants is called cud.
So, the correct answer is 'cud'.

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

The sac like structure between the small intestine and the large intestine in ruminants is

  1. Lumen

  2. Appendix

  3. Rumen

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

Rumen is a sac-like largest part of the stomach of the ruminants. It acts as a storage or holding vat for feed. It is also a fermentation vat.

So, the correct answer is 'Rumen'.

Multiple choice biology what do animals eat? digestion in ruminants nutrition in other organisms busy at work - our internal organs

Which of the following is not a ruminant?

  1. Cow

  2. Buffalo

  3. Dog

  4. Goat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Ruminants are the mammals that have the ability to take nutrients from the plant-based food containing cellulose by fermenting it in a specialized stomach prior to digestion with the help of microbes. Dogs are not able to digest cellulose due to the lack of enzyme called cellulase and hence dogs are not ruminant.
So, the correct answer is 'Dog '.