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Question
The figure given below represents a kidney tubule in humans and its blood supply. Study the figure and answer the questions that follow. Write specific name and numbers shown in the diagram for each answer.
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- Name the part which consists of a knot - like mass of blood capillaries.
- What is the specific name for the combination of parts shown as 5 and 3?
- Name the part which collects the glomerular filtrate.
- Where is the most water reabsorbed?
- Name the part which collects urine in the diagram shown.
- Which part lies in the medulla of the kidney?
- Which of the above parts is involved in the process of tubular secretion?
- How is hydrostatic pressure created?
- Where does ultrafiltration take place?
- Name two important constituents of urine.
Solution
- Glomerulus
- Malpighian capsule
- Bowman's Capsule
- Proximal Convoluted Tubule
- Collecting Duct
- Loop of Henle and Collecting Duct
- Proximal and Distal Convoluted tubule
- The efferent (outgoing) arteriole is thinner than the afferent (incoming). This creates significant hydrostatic pressure in the glomerulus.
- Glomerulus
- Components of urine are water and solid waste (urea, creatinine, uric acid, etc.)
RELATED QUESTIONS
Explain the structure of nephron.
Identify the CORRECT combinations in the given table.
| Part of nephron | Location | Function | |
| i. | Malpighian body | Cortex | Filtering blood |
| ii. | Proximal convoluted tubule | Cortex | Absorption of useful substances |
| iii. | Distal convoluted tubule | Only Medulla | Absorption of urea by action of ADH |
| iv. | Collecting duct | Either Cortex or Medulla | Collection of urine |
Structural unit of kidney are called ______.
The loop of Henle and collecting ducts lie in the ____________ of the kidney.
The proximal end of the renal tubule is a cup like structure called ______.
A nephron consists of ______
JG cells of Kidney secrete ______.
Write down the functional activity of the following parts:
Collecting duct
Match the items in Column I with those in Column II and write down the matching pairs.
| Column I | Column II | ||
| (a) | Bowman's capsule | (i) | Renal artery |
| (b) | Contains more CO2 and less urea | (ii) | Regulates amount of water excreted |
| (c) | Antidiuretic hormone | (iii) | Renal vein |
| (d) | Contains more urea | (iv) | Glomerulus |
Write the exact location of the following:
Malpighian capsule
