Tubular Reabsorption and Secretion

Q.

Rearrange these parts of a nephron in the order in which the fluid flows from the filtration membrane through the nephron.

1. Renal corpuscle; Proximal tubule; Loop of Henle; Distal tubule; Collecting duct

2. Proximal tubule; Loop of Henle; Distal tubule; Renal corpuscle; Collecting duct

3. Loop of Henle; Proximal tubule; Distal tubule; Renal corpuscle; Collecting duct

4. Renal corpuscle; Distal tubule; Proximal tubule; Loop of Henle; Collecting duct

Q. Explain the 3 main functions that take place in nephron in detail( Ultra filtaration, Tubular secretion and Tubular reabsorption) with all important places where it takes place.

Q.

What is the role of lymph in our body?

Q. Which one of the following statements with regard to the excretion by the human kidneys is correct?

1. Descending limb of loop of Henle is impermeable to water
2. Distal convoluted tubule is incapable of reabsorbing $HC{O}_3$
3. Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubule
4. Ascending limb of loop of Henle is impermeable to electrolytes

Q.

Sodium, water and phosphate reabsorption is maximum in

1. Loop of Henle

2. PCT

3. DCT

4. Collecting Tubule

Q.

In summer the urine is slightly thicker than in winter. Explain the reason.

Q. Name the substance reabsorbed into the blood?what is the filtrate then called?

Q.

Active transport of substances from the blood into the nephron is called _____.The movement of substances from the filtrate back into the blood in the peritubular capillaries is called _____.

1. tubular reabsorption; tubular secretion

2. filtration; back flow

3. tubular reabsorption; backflow

4. tubular secretion; tubular reabsorption

Q.

The mechanism of urine formation in nephron involves_______

1. Ultrafiltration

2. Reabsorption

3. All of the above

4. Tubular secretion

Q.

How is urine formation regulated in humans?

Q.

In kidneys, urine is produced by three processes as____________

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

Q. Excretion of bile pigments in urine indicates ___ .

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.

Does ANP increase urine output?

Q. Arrange the following structures in the sequence of path taken by the filterate in nephron.

1. Bowman's capsule
2. PCT
3. Henle's loop
4. DCT
5. Collecting duct

Q.

Which of the following statements is correct with respect to kidney function?

1. During summer when body loses a lot of water by evaporation, the release of ADH is suppressed

2. Exposure to cold temperature stimulates ADH release

3. An increase in glomerular blood flow stimulates formation of angiotensin II

4. When someone drinks a lot of water, ADH release is suppressed

Q.

What are the interrelated processes of urine formation?

Q.

Highest organic constituent of urine

1. Urea

2. Creatinine

3. Uric acid

4. Sodium chloride

Q. Tick the correct statement(s) regarding the parts of a nephron.

Q.

c] give biological explanation

1] urine is acidic but blood is alkaline fromwhere urine is produced

Q.

Can you pull DNA from urine?

Q.

Which of the following statements is correct with respect to kidney function?

1. During summer when body loses a lot of water by evaporation, the release of ADH is suppressed

2. Exposure to cold temperature stimulates ADH release

3. An increase in glomerular blood flow stimulates formation of angiotensin II

4. When someone drinks a lot of water, ADH release is suppressed

Q.

Active transport of substances from the blood into the nephron is called _____. The movement of substances from the filtrate back into the blood in the peritubular capillaries is called _____.

1. Tubular reabsorption and Tubular secretion

2. Tubular reabsorption and Backflow

3. Filtration and back flow

4. Tubular secretion and Tubular reabsorption

Q. Given alongside is a highly simplified (but also somewhat wrong) diagram of the human kidney cut open longitudinally. Answer the questions that follow.
Define excretion.

Q. The diagram given below shows a section of a human kidney. Study the diagram carefully and answer the questions that follow.

(v) Name the two major steps in the formation of the fluid mentioned in (iii).

Q.

Which of the following is not correctly matched?

1. Bowman’s capsule – Glomerular filtration

2. Loop of Henle – transport of electrolytes

3. PCT – Absorption of $N{a}^{+}$ and $K^{+}$

4. DCT – Absorption of glucose

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

1. Tubular Secretion
2. Tubular reabsorption
3. All of the above
4. Glomerular filtration

Q. Role lymph in our boby