Tag: introduction to human digestive system

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Multiple choice evs digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Ecological pyramids are of

  1. Two types

  2. Three types

  3. Four types

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

A pyramid-shaped diagram represents quantity wise numbers of organisms, energy relationships, and biomass of an ecosystem; In lower trophic levels number of organisms are high(plants) and at the highest trophic level, lesser number as some energy is lost as heat, in each transformation. This relationship is sometimes called an ecological pyramid.  The ecological pyramids represent the trophic structure and also trophic function of the ecosystem. In many ecological pyramids, the producer form the base and the successive trophic levels make up the apex. The ecological pyramids may be of following three kinds-

Pyramid of Number- It is the arrangement of trophic level on the basis of the number of organism present at each stage.
Pyramid of Biomass-  It is the arrangement of trophic level on the basis of biomass present at each trophic levels.
Pyramid of Energy- It is the arrangement of trophic level on the basis of energy flow between them.

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

What is acrosomal reaction?

  1. Contact of sperms with egg

  2. Digestion of zona pellucida

  3. Disintegration of acrosome

  4. Contact of acrosome and nucleus of egg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The acrosomal reaction involves the release of enzymes from the sperm's acrosome, which digest the zona pellucida of the egg to allow fertilization.

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Our stomach is located 

  1. In the head

  2. In the left side of the body

  3. In the right side of the body

  4. Below the abdomen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The stomach is a muscular organ located on the left side of the upper abdomen. 
  • The stomach receives food from the oesophagus.
  •  As food reaches the end of the oesophagus, it enters the stomach through a muscular valve called the lower oesophagal sphincter.
  •  The stomach secretes acid and enzymes that digest food. Hence, our stomach is located on the left side of the body.
So, the correct answer is 'on the left side of the body'.
Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

In which animal both intracellular and intercellular digestion occurs

  1. Hydra

  2. Earthworm

  3. Nematode

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

Hydra is a cnidarian that exhibits both intracellular digestion (within food vacuoles of gastrodermal cells) and extracellular digestion (within the gastrovascular cavity). Other options like earthworms and nematodes primarily rely on extracellular digestion within a complete digestive tract.

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Choose the correct answer from the allternatives given.
Which part of the digestive system secretes peritrophic membrane around the food in cockroach?

  1. Crop

  2. Gizzard

  3. Hepatic caecae

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

Answer C: Hepatic Caecae

The digestive juices flow into the stomach owing to the caecae secretion. The midgut is lined by a peritrophic membrane and not by a cuticle or cuticle.

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Find out phenotypic categories in following cross :
A - AaBbCC $\times$ aa BBCc
B - Gg Rr Tt $\times$ gg rr TT
C - aabbCC $\times$ AA BB cc

  1. (A) 2 (B) 4 (C) 1

  2. (A) 2 (B) 2 (C) 2

  3. (A) 2 (B) 3 (C) 1

  4. (A) 3 (B) 2 (C) 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The phenotype of an organism is the composite of the organisms observable characters, A has 2 observable characters, B shows 4 characters, while C shows 3.

So, the correct option is '(A) 2 (B) 4 (C) 1'.

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Choose the correct answers from the alternatives given.
The archenteron develops into

  1. blastocoel

  2. endoderm

  3. lumen of the digestive tract

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

Archenteron is the primary cavity which is formed at the initial stage of gastrulation. This cavity begins at the dorsal lip of blastopore which is at the one side of the dividing zygote and then this cavity moves through the zygote to the other side which gives rise to the anus. 

So the correct option is 'lumen of digestive tract

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

How many of the enzymes given below in block belong to brush border enzymes?
Multase, Nucleosidase, Enterokinase, Amylopsin, Steapsin, Nucleases, Erepsin, Carboxypeptidase, Lactase, Aminopeptidase

  1. Six

  2. Seven

  3. Five

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

The brush borders of the intestinal lining are the site of terminal carbohydrate digestions. The microvilli that constitute the brush border have enzymes for this final part of digestion anchored into their apical plasma membrane as integral membrane proteins. Maltase, lactase, erepsin, nucleosidase are the brush border enzymes.

So, the correct option is 'four'.

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Citrate undergoes dehydration to form unstable compound

  1. iso-citrate

  2. succinate

  3. cis-aconitate

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

In step two, an enzyme called aconitase converts citrate into isocitrate. Next, an isocitrate dehydrogenase enzyme oxidizes isocitrate, a six-carbon molecule, to a five-carbon α-ketoglutarate. The carbon that was lost is released as carbon dioxide and one NADH is also formed.

So, the correct option is, 'Isocitrate'.

Multiple choice bio-chemistry from tasting to digestion types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Which reserve food is consumed by man during starvation:

  1. Fat

  2. Protein

  3. Glycogen

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

Starvation is defined as a severe deficiency in calorie energy intake needed to maintain human life.

During first stage of starvation, glucose levels are maintained through production of glucose from proteins, glycogen and fats.Then body burns fats first exhusting contents of digestive tract along with glycogen resetrves stored in liver cells.