Class 11 Biology - Chapter Excretory products and their Elimination NCERT Solutions | What is meant by the term osmoregulation
What is meant by the term osmoregulation?
Osmoregulation is a homeostatic mechanism that regulates the optimum concentration of water and salts in the tissues and body fluids. It maintains the internal environment of the body by water and ionic concentration.
More Questions From Class 11 Biology - Chapter Excretory products and their Elimination
- Q:-
Describe the role of liver, lungs and skin in excretion.
- Q:- Explain the autoregulatory mechanism of GFR.
- Q:- Give a brief account of the counter current mechanism.
- Q:- Name the following:
(a) A chordate animal having flame cells as excretory structures
(b) Cortical portions projecting between the medullary pyramids in the human kidney
(c) A loop of capillary running parallel to the Henles loop. - Q:- What is the significance of juxtaglomerular apparatus (JGA) in kidney function?
- Q:- Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why?
- Q:- Fill in the gaps:
(a) Ascending limb of Henles loop is ____________to water whereas the descending limb is___________to it.
(b) Reabsorption of water from distal parts of the tubules is facilitated by hormone____________.
(c) Dialysis fluid contains all the constituents as in plasma except ________.
(d) A healthy adult human excretes (on an average) _______ gm of urea/day. - Q:- Match the items of column I with those of column II:
Column I Column II
(a) Ammonotelism (i) Birds
(b) Bowmans capsule (ii) Water reabsorption
(c) Micturition (iii) Bony fish
(d) Uricotelism (iv) Urinary bladder
(e) ADH (v) Renal tubule - Q:- Explain micturition.
- Q:- Define Glomerular Filtration Rate (GFR)
Popular Questions of Class 11 Biology
- Q:- Why are living organisms classified?
- Q:- Discuss how classification systems have undergone several changes over a period of time?
- Q:- What is the basis of classification of algae?
- Q:- What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
- Q:- What is meant by modification of root? What type of modification of root is found in the (a) Banyan tree (b) Turnip (c) Mangrove trees
- Q:- State the location and function of different types of meristem.
- Q:- Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermathecae are found in earthworm? (iii) What is the position of ovaries in the cockroach? (iv) How many segments are present in the abdomen of cockroach? (v) Where do you find malphigian tubules?
- Q:-
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell. - Q:- What are macromolecules? Give examples.
- Q:- What is the average cell cycle span for a mammalian cell?
Recently Viewed Questions of Class 11 Biology
- Q:- Why are living organisms classified?
- Q:- Why are the classification systems changing every now and then?
- Q:- Name the stage of cell cycle at which one of the following events occur:
(i) Chromosomes are moved to spindle equator
(ii) Centromere splits and chromatids separate
(iii) Pairing between homologous chromosomes takes place
(iv) Crossing over between homologous chromosomes takes place - Q:- Differentiate between:
(a) Myelinated and non-myelinated axons
(b) Dendrites and axons
(c) Rods and cones
(d) Thalamus and Hypothalamus
(e) Cerebrum and Cerebellum - Q:- What are the following and where do you find them in animal body
(a) Chondriocytes
(b) Axons
(c) Ciliated epithelium - Q:-
Mention the ploidy of the following:
protonemal cell of a moss;
primary endosperm nucleus in dicot,
leaf cell of a moss;
prothallus cell of a fern;
gemma cell in Marchantia;
meristem cell of monocot,
ovum of a liverwort, and
zygote of a fern.
- Q:-
What are the functions of liver?
- Q:- Match the following:
Column I Column II
A T4 i Hypothalamus
B PTH ii Thyroid
C GnRH iii Pituitary
D LH iv Parathyroid - Q:-
Choose the correct answer among the following:
(a) Gastric juice contains
(i) pepsin, lipase and rennin
(ii) trypsin lipase and rennin
(iii) trypsin, pepsin and lipase
(iv) trypsin, pepsin and renin
(b) Succus entericus is the name given to
(i) a junction between ileum and large intestine
(ii) intestinal juice
(iii) swelling in the gut
(iv) appendix - Q:- Define RQ. What is its value for fats?
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