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प्रश्न
Name the following:
A chordate animal having flame cells as excretory structures
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उत्तर
Cephalochordate - Amphioxus
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संबंधित प्रश्न
Put a tick mark (✓) against the most appropriate alternative in the following statement :
The kidneys are made up of tiny tubular units called :
Tick the most appropriate answer.
The opening of the urinary bladder is called
Define the following term:
urea
The diagram given alongside represents an organ system in the human body. Study the same and answer the questions that follow:
- Identify the system
- Label the parts marked 2 and 4. Mention the function of part 5.
- Name the structural and functional units of the part marked 1.
- What is the fluid that accumulates in part 3?
Which is the main nitrogenous waste present in it? - Draw a neat, labelled diagram showing the longitudinal section of part 1.
Choose the correct answer:
Uric acid is excreted by _______________
Name the following:
Animals which eliminate urea.
How is urea produced?
Why urine is acidic while blood is alkaline?
Give Technical Terms:
Name three substances that are reabsorbed from the renal tubules by the secondary capillaries
Complete the following sentence with appropriate word:
Automatic self-regulation of salt and water within the body is known of ______.
Multiple Choice Question: What is the chief nitrogenous waste in mammals?
Choose the correct option.
Which one of the following is not a part of human kidney?
Choose the correct option.
Volume of the urine is regulated by ______.
Differentiate protonephridia from metanephridia.
Match the parts given in Column I with their physiological processes given in Column II.
| Column I | Column II | ||
| i. | Proximal convoluted tubule | a. | Formation of concentrated urine |
| ii. | Distal convoluted tubule | b. | Filtration of blood |
| iii. | Henle's loop | c. | Reabsorption of 70-80% of electrolytes |
| iv. | Vasa recta | d. | Ionic balance |
| v. | Malpighian body | e. | Counter mechanism |
Which are the two main organic wastes present in urine?
Which one of the following statements is INCORRECT?
Kidneys are vital organs for survival. Several factors like infections, injury or restricted blood flow to kidneys reduce the activity of kidneys. This leads to the accumulation of poisonous wastes in the body, which can even lead to death. In case of kidney failure, an artificial kidney can be used. An artificial kidney is a device to remove waste products from the blood through dialysis.
i. a. Name the artery that brings oxygenated blood to the kidney.
b. Name the cluster of the thin-walled blood capillaries present in the Bowman's capsule.
ii. In the human excretory system, name the organ which stores urine. Is this organ under hormonal control or nervous control?
iii. List two major steps involved in the formation of urine and state in brief their functions.
OR
iii. In which part of the nephron does selective reabsorption take place? List the factors which the amount of water reabsorbed depends on.
Urethral external sphincter present between urinary bladder and urethra is made up of ______ muscles, and is ______ in nature.
