BIOLOGY M.C.Q (1 Marks)

Choose the correct answer from the options given below :

$(a)$ Contraction of diaphragm

$(b)$ Contraction of external inter-costal muscles

$(c)$ Pulmonary volume decreases

$(d)$ Intra pulmonary pressure increases

$R$ : The main stimulus for these quick changes is due to input from the proprioreceptors, which monitor movements of joints and muscles.

$I.$ Breathing or pulmonary ventilation

$II.$ Diffusion of $O _{2}$ and $CO _{2}$ between blood and tissues

$III.$ Transport of gases by blood

$IV.$ Utilisation of $O_{2}$ by cells

$V.$ Diffusion of $O _{2}$ and $CO _{2}$ across the alveolar membrane

Choose the correct option

$(1)$ On and average a healthy human breaths ...$X$....times/minutes

$(2)$ Every $100\, ml$ of oxygenated blood can deliver around ....$Y$.... of $O_2$ of the tissues under normal physiological conditions.

$X-Y$

Select the right choice for $A$ and $B$ to complete the given $NCERT$ statement

$II.$ $p CO _{2}$ is low and $p O _{2}$ is high in tissues

$III.$ $RBC$ contains a very high concentration of carbonic anhydrase

$IV.$ Every $100\; mL$ of deoxygenated blood delivers approximately $4\; mL$ of $CO _{2}$ to alveoli

Select the combination of right statements

$II.$ Increased partial pressure of $CO _{2}$

$III.$ Increased partial pressure of $H^{+i i}$

$IV.$ Decreased partial pressure of $O_{2}$

All the above situations favours the dissociation of oxyhaemoglobin except

$I.$ partial pressure of $O_{2}$

$II.$ partial pressure of $CO _{2}$

$III.$ hydrogen ion concentration

$IV.$ temperature

Choose the correct option

Select the right options for $A, B, C$ and $D$ to the complete the given statement

$CO _{2}+ H _{2} O \stackrel {A} {\rightleftharpoons} H _{2} CO _{3} \stackrel {B} {\rightleftharpoons} \rightleftharpoons HCO _{3}^{-}+ H ^{+}$

$I.$ Oxygen is carried by haemoglobin

$II.$ Oxygen is carried by carbonic anhydrase

$III.$ $C O_{2}$ is carried by haemoglobin

$IV.$ $SO _{2}$ is carried by haemoglobin

$V.$ Only oxygen is transported by the blood

$VI.$ Only $C O_{2}$ is transported by the blood

Choose the correct option

Thus, $C O_{2}$ is trapped as ...$C$... at the tissue level and transported to alveoli is released out as ...$D$...

Select the right choice for $A, B, C$ and $D$ to complete the given $NCERT$ statement

 $\begin{array}{|l|l|} \hline Column\,\,-I   & Column\,\,-II \\ \hline 1.\,\,97\,\,percent\,\,of\,\,O_2\,\,is\,\,transported & p.\,\,Bicarbonate \\ \hline 2.\,\,70\,\,percent\,\,of\,\,CO_2\,\,is\,\,transported & q.\,\,RBC  \\ \hline 3.\,\,100\,\,\,ml\,\,of\,\,oxygenated\,\,blood & r.\,\,4\,\,\,ml\,\, \\ \hline 4.\,\,100\,\,\,ml\,\,of\,\,deoxygenated\,\,blood & s.\,\,5\,\,\,ml \\ \hline \end{array}$

$R =$ Carbonic anhydrase catalyzes the formation of $HCO_3^-$ ions.

$I.$ Diffusion membrane is made up of $3$ layers

$II.$ Solubility of $CO _{2}$ in blood is higher than $O _{2}$ by $25$ times

$III.$ Breathing volumes are estimated by spirometer

$IV.$ High $H ^{+}$ in blood favours oxygen dissociation

Choose the correct option

 $\begin{array}{|p{0.3\linewidth}|p{0.5\linewidth}|} \hline Column-I  & Column-II\,\,(Amount\,\,of\,\,CO_2\,\,mm\,Hg) \\ \hline (a)\,\,Alveoli  & (1)\,\,40  \\ \hline (b)\,\,Tissue & (2)\,\,45  \\ \hline (c)\,\,Blood\,\,without\,\,O_2 & (3)\,\,40  \\ \hline (d)\,\,Blood\,\,with\,\,O_2 & (4)\,\,45  \\ \hline \end{array}$

$I.$ Tidal volume

$II.$ Residual volume

$III.$ Expiratory reserve volume

$IV.$ Vital capacity

$I.$ $1100\; mL -1200\; mL$

$II.$ $500\; mL$

$III.$ $5000\; mL -6000\; mL$

Choose the correct option

 $\begin{array}{|p{0.4\linewidth}|p{0.4\linewidth}|} \hline Respiratory\,\,capacities & Respiratory\,\,Volumes \\ \hline (i)\,\,RV\,\, & 2500\,\,\,mL  \\ \hline (ii)\,\,VC\,\, & 2500\,\,-\,\,3000\,\,\,mL \\ \hline (iii)\,\,IRV\,\, & 1100\,\,-\,\,1200\,\,\,mL \\ \hline (iv)\,\,IC & 4500\,\,\,mL  \\ \hline \end{array}$
Which one of the following is the correct matching of two copacities and volumes?

$(1)$ $TV$                 $(2)$ $IRV$

$(3)$ $RV$                 $(4)$ $ERV$

$R =$ Lungs have residual air

$I.$ Increase in the volume of the thoracic chamber in dorsoventral axis

$II.$ Upward and outward movement of the ribs

$III.$ Contraction of intercostal muscles

$IV.$ Entry of air inside the lungs

$V.$ Contraction of the diaphragm

$VI.$ Increase in the volume of the thoracic chamber in antero-posterior axis

Choose the correct option

Choose the correct options for the blanks $A, B, C$ and $D$ to complete the above statement with reference to NCERT textbook

$II.$ There is negative pressure in the lungs than the atmospheric pressure In which of the above two situations inspiration takes place? Choose the correct option accordingly?

$I.$ Relaxation of the diaphragm and sternum

$II.$ Reduction of the pulmonary volume

$III.$ Expulsion of air from the lungs

$IV.$ Increase in intra pulmonary pressure

Choose the correct option

$I.$ Ventillation in humans is an active process

$II.$ Diaphragm helps in generating the pressure gradient in the lungs

Choose the correct option

Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement

Choose the correct option for $A, B$ and $C$ from the given four options to complete the above statement with reference to NCERT textbook

$I.$ Double layered

$II.$ Fluid contained in it reduces the friction on the lung surface

$III.$ Its outer layer is in contact with thoracic wall

$IV.$ Its inner layer is in contact with lungs