Question
Describe the structure and functioning of nephrons.
✓
Answer
Each nephron is a cluster of very thin-walled blood capillaries. Each capillary cluster in the kidney called glomerulus is associated with the cup shaped Bowman's capsule that collects the filtered urine. Nephron filters the blood in order to remove nitrogenous waste. They also absorb some useful substance such as glucose, amino acids, minerals and major amount of water from filtrate.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the flower.
Look at Figure and answer the following questions:
- What change would you observe in the calcium hydroxide solution taken in tube B?
- Write the reaction involved in test tubes A and B respectively.
- If ethanol is given instead of ethanoic acid, would you expect the same change?
- How can a solution of lime water be prepared in the laboratory?
$(i) '\ A\ '\ '\ B\ '$ are sodium salts of long$-$chain carboxylic acid and long chain Sulphonic acid respectively. Which one of $A$ or $B$ will you prefer as a cleansing agent while using underground water $($hand pump water$)$?
Give the reason for your answer.
$(ii)$ Elaborate on the process of cleansing action. Illustrate micelle with the help of labelled diagram.
$(iii)$ Write the chemical equation of the preparation of soap from an ester
$CH_3COOCH_3$. What is the name of this process?
→Give the reason for your answer.
$(ii)$ Elaborate on the process of cleansing action. Illustrate micelle with the help of labelled diagram.
$(iii)$ Write the chemical equation of the preparation of soap from an ester
$CH_3COOCH_3$. What is the name of this process?
State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answer.
An object of height $4.0 \ cm$ is placed at a distance of $30 \ cm$ from optical centre $O$ of a concave lens of focal length $20 \ cm.$ Draw a ray diagram to find the position and size of the image formed. Mark optical centre $O$ and principal focus $F$ on the diagram. Also, find the approximate ratio of size of the image to the size of the object.
→The pancreas is made up of two parts A and B. The part A secretes insulin whereas part B secretes pancreatic juice.
- Which part is functioning as an endocrine gland? Why?
- What is insulin and what effect does it have in the body?
- Name the disease which can be treated by giving insulin injection.
- What does pancreatic juice contain? Where does pancreatic juice go?
- Name the life process in which pancreatic juice is made use of.
- Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain.
- Draw a diagram of human respiratory system and label-pharynx, trachea, lungs, diaphragm and alveolar sac on it.
i. Name the mode of reproduction of the following organisms and state the important feature of each mode:
a. Planaria
b. Hydra
c. Rhizopus
ii. We can develop new plants from the leaves of Bryophyllum. Comment.
iii. List two advantages of vegetative propagation over other modes of reproduction.
a. Planaria
b. Hydra
c. Rhizopus
ii. We can develop new plants from the leaves of Bryophyllum. Comment.
iii. List two advantages of vegetative propagation over other modes of reproduction.
Give reasons why acquired characters are not inherited.
Atomic number of a few elements are given below:
10, 20, 7, 14
10, 20, 7, 14
- Identify the elements.
- Identify the Group number of these elements in the Periodic Table.
- Identify the Periods of these elements in the Periodic Table.
- What would be the electronic configuration for each of these elements?
- Determine the valency of these elements.