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Select the incorrect option regarding digestion and absorption of substances in different parts of digestive system.

evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. In large intestine, absorption of water, some minerals and drugs take place

  2. Absorption of water, simple sugars and alcohol takes place in stomach

  3. Small intestine is the principal organ for absorption of nutrients

  4. The digestion is completed in large intestine

Show answer
Correct Option: D
Explanation:

No significant digestive activity occurs in the large intestine. The functions of large intestine are :

• absorption of some water, minerals and certain drugs.
• secretion of mucus which helps in adhering the waste(undigested) particles together and lubricating it for an easy passage.
So the correct option is "The digestion is completed in large intestine".

The food we take in our body travels through a long and complex path. Which starts from mouth to anus. Which is the correct sequence of process on food in the digestive system?

evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Digestion $\rightarrow$ Absorption $\rightarrow$ Egestion $\rightarrow$ Ingestion

  2. Ingestion $\rightarrow$ Egestion $\rightarrow$ Digestion $\rightarrow$ Absorption

  3. Digestion $\rightarrow$ Ingestion $\rightarrow$ Absorption $\rightarrow$ Egestion

  4. Ingestion $\rightarrow$ Digestion $\rightarrow$ Absorption $\rightarrow$ Egestion

Show answer
Correct Option: D
Explanation:
Ingestion- Ingestion means intake of food into the mouth and chewing of food.
Digestion- Ingested food enters into the stomach where Digestion of food takes place. Many digestive juices get mixed with food and digestion gets completed.
Absorption- Digested food enters into the intestine. The absorption of food takes place in the intestine. intestines have many finger-like projection which is known as villi. Villi help the absorption of food.
Egestion- Excretion of waste occurs in this stage. Waste throws out through the anus.
So, Option D is correct.

Which of the following statement is incorrect?

evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Fangs are certain specialised teeth attached to maxillary bones in poisonous snakes.

  2. Niacin is also known as pellagra preventing vitamin

  3. Choleretic are substances which increases secretion of HCl from stomach

  4. Hormone villikinin is released from intestinal villi

Show answer
Correct Option: C
Explanation:

A. Fangs are certain specialised teeth attached to maxillary bones in poisonous snakes. – true

B. Niacin is also known as pellagra preventing vitamin – true.

C. Choleretic are substances which increases secretion of HCl from stomach – false, because,Choleretics are substances that increase the volume of secretion of bile from the liver as well as the amount of solids secreted.

D. Hormone villikinin is released from intestinal villi- true

So, the correct option is 'chloretics are substances which increases secretion of HCl from stomach'.

Food after degiuttition suffers a number of changes in its texture while passing through the gut. Pick out the wrong statement with respect to above statement.

evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Food mixed with bile, pancreatic juice and succus entencus is called chyle

  2. Chyle is alkaline in pH

  3. Maximum water absorption occurs in colon

  4. Chyme is acidic in nature

Show answer
Correct Option: A

The given table shows the result of intravenous injection of substances to determine the effect of each substance on normal body variables. An appropriate amount of time was allowed between injections and the substances did not interfere with one another. 

Variable Baseline values Values after injecting substance A Values after injecting substance B Values after injecting substance C Values after injecting substance D
Serum ${ Ca }^{ ++ }$ 2.3mmol/L 2.3mmol/L 2.3mmol/L 3.0mmol/L 2.3mmol/L
Serum ${ Na }^{ + }$ 135mmol/L 135mmol/L 135mmol/L 136mmol/L 135mmol/L
Serum glucose 5.6mmol/L 3.3mmol/L 5.6mmol/L 7.4mmol/L 5.6mmol/L

The normal release of substance D will be

evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Soon after a meal.

  2. When blood pressure is low.

  3. Between meals.

  4. When there has been limited intake of dietary calcium.

  5. When dietary calcium is in excess.

Show answer
Correct Option: B
Explanation:

After intravenous injection of substance D, it is seen that there is no change in the baseline values of calcium, sodium and glucose level. When the blood pressure is low it will be released, so that the blood pressure is maintained by regulating sodium, calcium and glucose level.

So, the correct answer is option B.

Apples are generally wrapped in waxed paper to

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Prevent sunlight for changing its colour

  2. Prevent aerobic respiration by checking the entry of $O _2$

  3. Prevent ethylene formation due to injury

  4. Make the apples look attractive

Show answer
Correct Option: B
Explanation:

Apples are wrapped with waxes after they are harvested to increase their shelf life till they reach the end consumer. The waxing process closes the pores present on the fruit preventing exchange of gases, thus reduced catabolism and senescence.

So, the correct answer is 'Prevent aerobic respiration by checking the entry of  $O _2$

Sodium benzoate is used to preserve

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Meat

  2. Fish

  3. Dairy product

  4. Fruit cocktail

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Correct Option: D

Dehydration of food is also known as

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Dessication

  2. Drying

  3. Sterilization

  4. Both A and B

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Correct Option: D

UHT stands for____________.

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Ultra high temperature

  2. Unique high temperature

  3. Ultra hot temperature

  4. All of the above

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Correct Option: A

Pasteurisation is?

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Heating of liquid at $65^o$C

  2. Heating of liquid between $65^o$ - $80^o$C followed by rapid cooling

  3. Heating of solids at $65^o$C

  4. None of these

Show answer
Correct Option: B
Explanation:

Pasteurization is a process in which milk is heated at high temperatures (65 degree celsius approx) followed by rapid cooling to kill pathogenic bacteria.

Correct answer-B