Tag: bio-chemistry

Questions Related to bio-chemistry

In the inflammatory response, the absence of which one of the following would prevent all the others from happening?

bio-chemistry immunology innate and acquired immunity body fluids and immune responses immunity and immune system

  1. Release of histamine

  2. Dilatation of arterioles

  3. Increased population of phagocytes in the area

  4. Increased permeability of blood vessels

Show answer
Correct Option: A
Explanation:

Histamine, biologically active substance found in a great variety of living organisms. It is distributed widely. The effect histamine has on blood vessels is crucial to its role in the immune response, which is most clearly observed in inflammation i.e., the local reaction of bodily tissues to injury caused by physical damage, infection, or allergic reaction. Injured tissue mast cells  release histamine, causing the surrounding blood vessels to dilate and increase in permeability. This allows fluid and cells of the immune system, such as leukocytes (white blood cells) and blood plasma proteins, to leak from the bloodstream through the vessel walls and migrate to the site of tissue injury or infection, where they begin to fight the infection and nourish and heal the injured tissues..


So, the correct option is 'Option A'.

Select the correct option:

Read the following statements and select the correct option:
(i) Blood cells secrete fibres of structural proteins called collagen and elastin.
(ii) Neuroglial cells protect and support the nephrons.
(iii) Osteocytes are present in spaces called lacunae.
(iv) Straited muscle fibres are bundled together in a parallel fashion.
(v) Biceps are involuntary and striated

bio-chemistry transportation in plants and circulation in animals role of blood in transport function of blood blood and lymph

  1. Statements (iii) and (iv) are incorrect

  2. Statement (ii) and (iv) are incorrect

  3. Statement (i) and (iii) are incorrect

  4. Statement (i), (ii) and (v) are incorrect

Show answer
Correct Option: D
Explanation:

The structural proteins collagen and elastin are present in white collagen fibres and yellow elastic fibres respectively, which are connective tissue fibres. Neuroglial cells are specialised cells found in the brain and spinal cord supporting the neurons and their firbres. The muscles of biceps are voluntary and striated.

The least abundant cells in the human blood among the following are

bio-chemistry transportation in plants and circulation in animals role of blood in transport function of blood blood and lymph

  1. Neutrophils

  2. Monocytes

  3. Erythrocytes

  4. Eosinophils

Show answer
Correct Option: A

Most carbon dioxide in blood is in the form of

bio-chemistry transportation in plants and circulation in animals role of blood in transport function of blood blood and lymph

  1. carbon dioxide

  2. carbonic acid

  3. carbon monoxide

  4. hydrogencarbonate

Show answer
Correct Option: D
Explanation:

Carbon dioxide is transported in the blood from the tissue to the lungs in three ways: (i) dissolved in solution; (ii) buffered with bicarbonate and (iii) bound to proteins, particularly haemoglobin. Majority of the carbon dioxide in the blood is carried by means of a bicarbonate buffer system. So, the correct option is 'hydrogen carbonate'.

The function of blood is to

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Absorb nutrients

  2. Transport gases

  3. Produce food

  4. Both B and C

Show answer
Correct Option: B
Explanation:

Blood performs many important functions within the body. These functions include the supply of oxygen to tissues (bound to hemoglobin, which is carried in red cells), the supply of nutrients such as glucose, amino acids, and fatty acids (dissolved in the blood or bound to plasma proteins e.g., blood lipids), transport of gases etc.

Therefore, the correct answer is option B.

By what name is the liquid medium of blood Known as?

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. waste (excretory) substance

  2. Blood particle

  3. plasma

  4. Waste material

Show answer
Correct Option: A

How blood maintains water balance in the body ?

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. By regulating the pH of the body

  2. By bringing constant exchange of water between circulating blood and tissue fluid

  3. By transporting the excretory material

  4. All of the above

Show answer
Correct Option: B
Explanation:

Blood maintains water balance in the body by bringing constant exchange of water between circulating blood and tissue fluid. Regulating pH and transportation of excretory material are other functions performed by blood.

Blood carries

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Oxygen

  2. Waste

  3. Food

  4. All of the above

Show answer
Correct Option: D
Explanation:
The blood transports oxygen from the lungs to the cells of the body, where it is needed for metabolism. Blood also provides the cells with nutrients, transports hormones and removes waste products
So, the correct answer is 'All of the above'

What fraction of your body is water? 

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. 1/4

  2. 2/3

  3. 1/2

  4. 1/3

Show answer
Correct Option: B
Explanation:

About 2/3 of the average human body is water, mostly within the cells. The amount of water in the human body ranges from 50-75%. The average adult human body is 50-65% water, averaging around 57-60%. The percentage of water in infants is much higher, typically around 75-78% water, dropping to 65% by one year of age. Thus, option B is correct.

Substances transported by blood are..............

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Food materials

  2. Excretory materials

  3. Hormones

  4. All of the above

Show answer
Correct Option: D
Explanation:
Blood Is an important fluid connective tissue which circulates throughout the body. It transports food, waste, hormones, oxygen etc. throughout the body.