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. Pavement epithelium is another name for:

1. Cuboidal epithelium
2. Ciliated epithelium
3. Simple squamous epithelium
4. Stratified epithelium

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

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

Q.

The glomerular filtrate in the looop of Henle gets concentrated in the descending and then gets diluted in the ascending limbs. Explain.

Q.

Concentration of urine depends upon which organ?

1. Bowman’s capsule

2. P.C.T.

3. network of capillaries arising from glomerulus

4. length of Henle’s loop

Q.

Glomerular filtrate does not contain

1. Glucose

2. Amino acids

3. Proteins

4. Hormones

Q.

What can switch off osmoreceptors in the body?

Q. In kidneys, urine is produced by three processes

1. Dialysis, ultrafiltration and tubular secretion
2. Ultrafiltration, dialysis and tubular secretion
3. Tubular reabsorption and tubular secretion
4. Ultrafiltration, tubular reabsorption and tubular secretion

Q. The transfer of materials from peritubular capillaries to the renal tubular lumen is called .

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

Q.

The vessel which leads blood into the bowmans capsule is

1. afferent arteriole

2. efferent arteriole

3. renal vein

4. renal artery

Q.

How does tubular secretioin help in maintaining ionic and acid base balance in body fluids?

Q.

Where is the malpighian body located?

Q. Pavement epithelium is also known as

1. cuboidal epithelium
2. squamous epithelium
3. columnar epithelium
4. ciliated epithelium

Q. During the formtion of urine, which among these processes helps in maintaining ionic and acid base balance in body fluids?

1. Ultrafiltration
2. Reabsorption
3. Secretion
4. None of the above

Q.

How is the loop of henle In the cortical nephrons?

Q.

Mention the substances that exit from the tubules in order to maintain a concentration gradient in the medullary interstitium.

Q.

The tissue lining the alveoli is _____ epithelium

1. pseudostratified columnar

2. cuboidal

3. simple squamous

4. stratified squamous

Q. This question consists of two statements, Assertion and Reason. While answering this question you are required to choose any one of the following five responses.

Assertion: Secreting hypotonic urine is effective in reducing urinary loss of water.

Reason: Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Q. Glucose and amino acids are reabsorbed in

Q.

Glucose reabsorption occurs in the

1. distal tubule

2. loop of Henle

3. cortical collecting duct

4. proximal tubule

Q. As compared to efferent arteriole, the afferent arteriole of kidney is

1. Shorter and wider
2. Longer and wider
3. Shorter and narrower
4. Longer and narrower

Q. Vasa recta is absent or highly reduced in

Q.

What is role of liver in iron homeostasis?

Q. The maximum amount of electrolytes and water (70-80%) from the glomerular filtrate is reabsorbed in which part of the nephron?

1. Ascending limb of loop of Henle
2. Distal convoluted tubule
3. Proximal convoluted tubule
4. Descending limb of loop of Henle

Q. Where does selective reabsorption takes place in nephron?

Q. Removal of proximal convoluted tubule from the nephron will result in

1. No urine formation
2. More diluted urine
3. More concentrated urine
4. No change in quality and quantity of urine

Q.

Salt absorption and oxygen concentration are

1. inversely proportion

2. directly proportional

3. not inter related

4. none of the above

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). a., ii). c., iii). b., iv). d

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

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

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

Q.

Glucose is reabsorbed in the kidney mainly by

1. Bowman's capsule

2. Loop of Henle

3. Proximal Convoluted Tubule

4. Distal Convoluted Tubule

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