Tubular Reabsorption and Secretion

Q. The part of nephron involved in active reabsorption of sodium is

1. descending limb of Henle's loop
2. distal convoluted tubule
3. proximal convoluted tubule
4. Bowman's capsule

Q.

Which blood vessel carries the least amount of urea?

1. Hepatic portal vein

2. Renal artery

3. Renal vein

4. Pulmonary vein

Q.

Secretion and absorption stand as the main functions of this epithelium

1. Squamous

2. Cuboidal

3. stratified

4. Pseudo stratified

Q. Which of the following is not true about tubular reabsorption?

1. Nearly 99 per cent of the filtrate has to be reabsorbed by the renal tubules.
2. The tubular epithelial cells in different segments of nephron perform reabsorption either by active or passive mechanisms.
3. The nitrogenous wastes are absorbed by passive transport.
4. Reabsorption of water also occurs actively in the initial segments of the nephron

Q.

Glucose is mainly reabsorbed in

1. Henle's loop

2. PCT

3. DCT

4. Nephron

Q. The movement of substances from the filtrate back into the blood is called .

1. tubular secretion
2. tubular reabsorption
3. back flow
4. filtration

Q. Renal tubular secretion helps in maintaining

1. constant glomerular filtration rate
2. increasing osmolarity towards inner medulla
3. urine to be concentrated
4. ionic and pH balance in body fluids

Q. Sort in the correct order of tubular reabsorption process.

1. $\mathrm{Cytosol}$
2. $\mathrm{Luminal}\mathrm{membrane}$
3. $\mathrm{Interstitial}\mathrm{fluid}$
4. $\mathrm{Capillary}\mathrm{wall}$

Q. Match the following:
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i.Pressure filtration}& \text{a. Urea and uric acid}\\ \text{ii. Selective reabsorption}& \text{b.Penicillin}\\ \text{iii.Tubular secretion}& \text{c. Water, glucose, amino acids}\\ \text{iv. Excretion}& \text{d. Water, glucose, urea}\end{array}$

1. i) $\Rightarrow$ a, ii) $\Rightarrow$ c, iii) $\Rightarrow$ b, iv) $\Rightarrow$ d

2. i) $\Rightarrow$ d, ii) $\Rightarrow$ c, iii) $\Rightarrow$ b, iv) $\Rightarrow$ a

3. i) $\Rightarrow$ c, ii) $\Rightarrow$ b, iii) $\Rightarrow$d, iv) $\Rightarrow$ a

4. i) $\Rightarrow$ a, ii) $\Rightarrow$ d, iii) $\Rightarrow$ b, iv) $\Rightarrow$ c