Chapter 1 Quiz 4 (2nd Secondary Biology)

36 Questions | By Semsem612 | Last updated: Jan 29, 2021 | Total Attempts: 12

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Chapter 1 Quiz 4 (2nd Secondary Biology)

Food Absorption

Questions and Answers

1.

Water is mostly absorbed in the …..
- A.
  
  Colon
- B.
  
  Oesophagus
- C.
  
  Small intestine
- D.
  
  Stomach
2.

One of the following statements is not true about the intestinal villi ....…
- A.
  
  They possess micro-villi
- B.
  
  They increase the surface area
- C.
  
  They are supplied with blood capillaries and lacteal vessels
- D.
  
  They only participate in absorption of fats
3.

Arrange the correct sequence of the steps involved in the process of the Human Digestive System?
- A.
  
  Digestion, Ingestion, Assimilation of food, Defecation and Absorption
- B.
  
  Ingestion, Digestion, Absorption, Assimilation of food and Defecation
- C.
  
  Defecation, Absorption, Digestion, Assimilation of food and Ingestion
- D.
  
  Assimilation of food, Absorption, Ingestion, Digestion and Defecation
4.

The proper pathway of glucose molecules absorbed by the villi till reaching the heart is.....
- A.
  
  Lacteals / liver / hepatic vein / superior vena cava / heart
- B.
  
  Lacteals / lymphatic system / superior vena cava / heart
- C.
  
  Capillaries / hepatic portal vein / liver / hepatic vein / inferior vena cava / heart
- D.
  
  Capillaries / hepatic vein / liver / hepatic portal vein / superior vena cava / heart
5.

In the epithelial cells of the villi, ….. and ….. may recombine.
- A.
  
  Fatty acids and glycerol
- B.
  
  Fatty acids and amino acids
- C.
  
  Glucose and fructose
- D.
  
  Glucose and galactose
6.

All of the following represent the adaptation of the large intestine to its function except …..
- A.
  
  Lining of the epithelial wall has many convolutions to increase absorption.
- B.
  
  Feces are expelled outside the body by the contractions of the anal muscles.
- C.
  
  The mucosa layer secretes mucus to facilitate the exit of feces.
- D.
  
  Presence of Bacteria which break down undigested food remains into simple substances.
7.

The figure below illustrates the structure of the villi. Which of the following substances are absorbed in the structure (A) and which in the structure (B)?Vitamin D, Vitamin C, glycerol and minerals.
- A.
  
  Vitamins D and C in (A) / glycerol and minerals in (B)
- B.
  
  Vitamin D and glycerol in (B) / vitamin C and minerals in (A)
- C.
  
  Vitamins D, vitamin C and minerals in (A) / glycerol in (B)
- D.
  
  Minerals and glycerol in (A) / vitamins D and C in (B)
8.

The main functions of the digestive system are ......
- A.
  
  Ingestion and digestion
- B.
  
  Secretion and pushing food forwards
- C.
  
  Absorption and defecation
- D.
  
  All of the above
9.

According to the figure below, Which of the following statements is incorrect ......
- A.
  
  Photosynthesis process requires energy.
- B.
  
  Oxidation of free fatty acids requires energy.
- C.
  
  Adding an amino acid to a polypeptide chain requires energy.
- D.
  
  All condensation reactions are anabolic.
10.

The main function of lacteals (lymphatic capillaries) in the villi is the absorption of___.
- A.
  
  Water and mineral salts
- B.
  
  Amino acids and glucose
- C.
  
  Glucose and vitamins
- D.
  
  Fatty acids and glycerol
11.

What is absorption?
- A.
  
  The process of releasing digestive chemicals into the gastro-intestinal tract
- B.
  
  The process of physically breaking down foodstuffs
- C.
  
  The process of moving food components from the lumen of the gastro-intestinal tract into body cells
- D.
  
  The process of removing waste materials from the gastro-intestinal tract
12.

Digested food is transferred to the blood and lymph by …..
- A.
  
  Active transport and membrane diffusion
- B.
  
  Passive diffusion and imbibition
- C.
  
  Osmosis and active transport
- D.
  
  Membrane diffusion
13.

Which of the following statements is true about metabolism?
- A.
  
  It only involves the processes that build up the large molecules in the body.
- B.
  
  It only involves the processes that break down the small molecules in the body.
- C.
  
  It only involves the processes that break down the large molecules in the body.
- D.
  
  It involves all of the processes that break down and build up molecules in the body.
14.

When you eat a large meal, the _____ activity called digestion takes the biomolecules you consumed and breaks them down into smaller molecules.
- A.
  
  Metabolic
- B.
  
  Anabolic
- C.
  
  Catabolic
- D.
  
  Respiratory
15.

An example of catabolism is ___.
- A.
  
  Dehydration reaction
- B.
  
  Carbohydrate storage
- C.
  
  Hydrolysis reaction
- D.
  
  Condensation reaction
16.

Which is not true for the absorption process?
- A.
  
  Fat-soluble vitamins (A, D, E, and K) are absorbed along with dietary proteins.
- B.
  
  Water moves down its concentration gradient from the chyme into epithelial cells.
- C.
  
  In general all minerals that enter the intestine are absorbed, whether you need them or not.
- D.
  
  The free fatty acids and monoacylglycerides (glycerol molecules) that enter the epithelial cells are reincorporated into triglycerides.
17.

In each villus, all of the following are true except ……
- A.
  
  A lacteal is surrounded by blood capillaries in the mucosal layer of the ileum.
- B.
  
  Products of digestion are transferred to the blood and lymph
- C.
  
  There are tiny projections from the epithelial cells called micro-villi
- D.
  
  There is an outer covering of multi-layers epithelial cells.
18.

Vitamin A, emulsified fats, glucose and Vitamin C are food materials result from digestion of food. Which of them are found in (A) and which in (B)?
- A.
  
  Vitamin A and glucose are in (A) / Vitamin C and emulsified fats are in (B)
- B.
  
  Vitamins A and C are in (B) / glucose and emulsified fats are in (A)
- C.
  
  Glucose and emulsified fats are in (B) / vitamins A and C are in (A)
- D.
  
  Emulsified fats and vitamin A are in (B) / vitamin C and glucose in (A)
19.

The food particles shown in the figure below are absorbed by the epithelial mucosal cell of the villi and transferred through the lymphatic vessel to the ……
- A.
  
  Lymphatic system
- B.
  
  Superior vena cava directly
- C.
  
  Inferior vena cava directly
- D.
  
  Liver
20.

In anabolic reactions, the cell……
- A.
  
  Decreases in size within very narrow limits
- B.
  
  Remains same size
- C.
  
  Increases in size within very narrow limits
- D.
  
  Produces products of less energy-rich than their simple precursors.
21.

All the following describe the fate of fatty acids after absorption except.....
- A.
  
  Used in catabolic processes that generates energy.
- B.
  
  Used in anabolic processes that creates biologically important molecules such as phospholipids.
- C.
  
  Fatty acids and glycerol are stored in adipose fat in complex forms such as triglycerides.
- D.
  
  Can be used to make glucose.
22.

What happens to amino acids after absorption?
- A.
  
  Some amino acids are recycled to make new proteins.
- B.
  
  Some are used as a source of energy.
- C.
  
  Some are used to synthesize nitrogen containing compounds.
- D.
  
  All the above.
23.

The absorbed glucose that is not needed for energy is stored in the form of glycogen in …… and …….. as a source of potential energy, readily available when needed.
- A.
  
  Kidney, Liver
- B.
  
  Muscle cells, Brain cells
- C.
  
  Pancreas, adipose tissue
- D.
  
  Muscle cells, Liver
24.

The figure below is a diagrammatic representation for the absorption process. What are (A), (B) and (C)?
- A.
  
  (B) large intestine / (A) duodenum / (C) hepatic vein
- B.
  
  (C) inferior vena cava / (B) pancreas / (A) lacteal vessel
- C.
  
  (A) hepatic portal vein / (C) superior vena cava (B) liver
- D.
  
  (A) hepatic vein / (B) liver / (C) superior vena cava
25.

In the villi, once the absorbed amino acids passed through the cell membrane, they are released into the intestinal ……. and are transported to the liver by the…….
- A.
  
  Lymph, hepatic vein
- B.
  
  Lymphatic vessels, lacteals
- C.
  
  Mucosa, hepatic vein
- D.
  
  Blood stream, hepatic portal vein