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प्रश्न
Differentiate protonephridia from metanephridia.
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उत्तर
| Sr. No. | Protonephridia | Metanephridia |
| 1. | Primitive kidneys are protonephridia | Tubular excretory structures are |
| 2. | These are found in flatworms. | These are found in annelids and molluscs |
संबंधित प्रश्न
Glucose is actively reabsorbed in the proximal convoluted tubule.
Fill in the blank.
.................. carries urine from the kidney to the urinary bladder.
Answer the following in detail.
How do skin and lungs help in excretion?
Name the main nitrogenous metabolic waste excreted out by mammals including humans.
Choose the correct answer:
Excess proteins are converted into urea in ____________
What are some common excretory product?
Give Technical Terms
Which vessel will have the highest concentration of urea long after a meal ?
Complete the following sentence with appropriate word:
The process of removing the metabolic waste from the body is known as ______.
Complete the following sentence with appropriate word:
The duct which transports urine from kidney to urinary bladder is ______.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Harmful ammonium compounds formed during the metabolism in the cells are broken down to form urea in the kidney.
Choose the correct option.
Which one of the following is not a part of human kidney?
Choose the correct option.
The yellow colour of the urine is due to presence of ________.
Choose the correct option.
Bowman’s capsule is located in kidney in the _______.
The functional unit of kidney is ______.
The endocrine nature of the kidney is indicated by the secretion of ______
Structural unit of kidneys are ______.
Which one of the following statements is incorrect?
Identify the incorrect statement regarding the acids excreted by the human kidney.
The counter-current mechanism operates in nephron ______.
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.
