Tag: phases in respiration

Questions Related to phases in respiration

Match column I with column II and select the correct option from the given codes. 

Column I Column II
(A) Trachea (i) $PO _{2}$ in alveolar air 
(B) Respiratory centre (ii) ATP 
(C) Yeast (iii) Cartilaginous rings
(D) Insects (iv) Medullaoblongata
(E) Fish (v) Larynx
(F) Biologically useful energy (vi) Tracheal respiration
(G) 100mm Hg (vii) Ethanol
(H) Vocal cords (viii) Branchial respiration
zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. A-(iii), B-(iv), C-(vii), D-(vi), E-(viii), F-(ii), G-(i), H-(v)

  2. A-(v), B-(ii), C-(vii), D-(viii), E-(vi), F-(iv), G-(i), H-(iii)

  3. A-(vi), B-(iv), C-(viii), D-(v), E-(i), F-(ii), G-(iii), H-(vii)

  4. A-(i), B-(v), C-(vii), D-(iii), E-(viii), F-(ii), G-(iv), H-(vi)

Show answer
Correct Option: A
Explanation:

  • Trachea consists of C-shaped cartilaginous rings that support the walls of the trachea and prevent its collapse during inspiration. 
  • Respiratory centre is located in the medulla oblongata. 
  • Yeast undergoes anaerobic respiration to produce ethanol and $CO _{2}$. 
  • The type of respiration in insects and fish is tracheal respiration and branchial respiration respectively. 
  • ATP is a biologically useful energy produced during respiration. 
  • The partial pressure of $O _{2}$ in alveolar air is approximately 104 mm Hg. 
  • Vocal cords are present inside the larynx.
So the current option is A.

State whether the following statements are true or false.
Because $NAD^+$ and FAD are critical coenzymes in cellular respiration, huge quantities must be synthesized in the cell to ensure there is no shortage.

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

NAD+ and FAD are co-enzymes required for the completion of many biochemical pathways. However, there is no need for an enormous amount of synthesis of either of these co-enzymes as there as a mechanism of recycling the co-enzymes after completion of one step in the metabolic pathway. These co-enzymes are predominantly required for the synthesis of ATP (energy currency of the cell) and will be used in the electron transport chain for the production of the same. So, they are not required to be synthesized in huge quantities but they play a crucial role in cell energetics.

So, the correct statement is 'False'.