Histology of Duodenum
Trending Questions
Q.
The diagram given below is a section of the small intestinal mucosa showing villi; identify the parts denoted by numerals.
1. ⇒ Lacteal, 2. ⇒ Capillaries, 3. ⇒ Crypts of Lieberkuhn, 4. ⇒ Enterocytes.
1. ⇒ Capillaries, 2. ⇒ Crypts of Lieberkuhn, 3. ⇒ Enterocytes, 4.⇒ Lacteal.
- 1. ⇒ Enterocytes, 2. ⇒ Lacteal, 3. ⇒ Capillaries, 4. ⇒ Crypts of Lieberkuhn
- 1. ⇒ Crypts of Lieberkuhn, 2. ⇒ Enterocytes, 3. ⇒ Lacteal, 4. ⇒ Capillaries
Q. Duodenum has characteristic Brunner's glands which secrete two hormones called
- Secretin, cholecystokinin
- Prolactin, parathormone
- Estradiol, progesterone
- Kinase, estrogen
Q. If for some reason our goblet cells are non-functional, this will adversely affect
- Maturation of sperms
- Smooth movement of food downwards the intestine
- Secretion of sebum from the sebaceous glands
- Production of somatostatin
Q. Which substance is used to remove chlorophyll from a green leaf during photosynthesis experiments?
Q.
Question 50
Why is small intestine in herbivores longer than in carnivores?
Q.
Question 78
How do carbohydrates, proteins and fats get digested in human beings?
Q. Name the following:
(ii) Part of lymphatic system concerned with absorption of fats from the intestine.
(ii) Part of lymphatic system concerned with absorption of fats from the intestine.
Q. Amongst the following animals, who has the longest small intestine?
निम्नलिखित जंतुओं में से किसकी क्षुद्रांत्र सबसे लंबी होती है?
निम्नलिखित जंतुओं में से किसकी क्षुद्रांत्र सबसे लंबी होती है?
- Wolf
भेड़िया - Cheetah
चीता - Lion
शेर - Cow
गाय
Q. A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
(c) During the starch test, why was the leaf -
(1) boiled in water
(2) boiled in methylated spirit
(c) During the starch test, why was the leaf -
(1) boiled in water
(2) boiled in methylated spirit
Q. A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
(b) Why was the plant placed in the dark before beginning the experiment?
(b) Why was the plant placed in the dark before beginning the experiment?
Q.
Question 63
Explain the role of mouth in the digestion of food.
Q. Why is small intestine in herbivores longer than in carnivores?
Q. An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.
(b) What are C and D?
(b) What are C and D?
Q. The organisms A, B and C can obtain their food in three different ways. Organism A derives its food from the body of another living organism which is called its D, without killing it. The organism B takes in the solid food by the process of ingestion, digests a part of this food and throws out undigested food in the process called E. The organism C obtains its food from dead and decaying plants.
(d) Give one example of each of organisms like (i) A (ii) B, and (iii) C.
(d) Give one example of each of organisms like (i) A (ii) B, and (iii) C.
Q. The intestinal villi are more numerous and larger in posterior part of small intestine because:
- Digestion is faster in posterior part
- Blood supply is poorer in posterior part
- there is more digested food in posterior part
- blood supply is poorer in anterior part
Q. Why is small intestine in herbivores longer than in carnivores?
Q.
Considering the relationship in the first pair, complete the second pair by using a word or group of words:
Breakdown of glucose molecule : Glycolysis :: Formation of glucose from proteins : …………….