Tag: structures and functions related to the excretory system

Questions Related to structures and functions related to the excretory system

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.