What would be the consequences of a deficiency of haemoglobin in our bodies?
Blood has components- Red blood corpuscles, White blood corpuscles, platelets and Plasma. Red blood cells are the most abundant cells in the human body and they contain an oxygen- carrying pigment, the haemoglobin, in their cytoplasm. Haemoglobin is a conjugated protein, consists of globin and contains a non- protein group called heme; hence the name haemoglobin is given. Due to high partial pressure of the oxygen in the lungs, haemoglobin takes up the oxygen molecules and changes up into the bright red colour of the pigment, called Oxyhaemoglobin; and transport oxygen to the blood cells.
The deficiency of haemoglobin in our body affects the oxygen uptake capacity of blood and this can lead to the deficiency of oxygen in the cells. By this deficiency, it leads to the disease anemia. Anemia can be caused by many reasons including loss of oxygen, loss of blood, destruction of red blood cells or failure in formation of blood etc.
Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?
How is the amount of urine produced regulated?
What are the different ways in which glucose is oxidised to provide energy in various organisms?
What criteria do we use to decide whether something is alive?
The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm. (c) chloroplast.
(b) mitochondria. (d) nucleus.
What are the differences between autotrophic nutrition and heterotrophic nutrition?
What are outside raw materials used for by an organism?
What are the components of the transport system in highly organised plants?
What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
Where do plants get each of the raw materials required for photosynthesis?
Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
What is a good source of energy?
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
What changes can you make in your habits to become more environment-friendly?
What is the difference between a reflex action and walking?
What is the importance of DNA copying in reproduction?
If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?
Why should a magnesium ribbon be cleared before burning in air?
Define the principal focus of a concave mirror.
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
(a) calcium
(b) carbon
(c) silicon
(d) iron.
What are the different methods of contraception?
Name
(a) three elements that have a single electron in their outermost shells.
(b) two elements that have two electrons in their outermost shells.
(c) three elements with filled outermost shells.
How does our body respond when adrenaline is secreted into the blood?
10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount HCl solution (the same solution as before) required to neutralise it will be
(a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL
Asexual reproduction takes place through budding in
(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.
Name the substance which on treatment with chlorine yields bleaching powder.
A copper wire has diameter 0.5 mm and resistivity of 1.6 × 10–8 Ω m. What will be the length of this wire to make its resistance 10 Ω? How much does the resistance change if the diameter is doubled?
How is the concentration of hydronium ions (H3O+) affected when a solution of an acid is diluted?
How does chemical coordination occur in plants?