NIOS Biology Intext Solutions Chapter 15
INTEXT QUESTIONS 15.1
1. Give one example each of animals with open and closed circulatory system.
(i) Open circulation….
(ii) Closed circulation .
Ans:
(i) Prawn, insects, etc
(ii) Vertebrates like humans, fish, birds
2. Where in the heart are the following valves located?
(i) Bicuspid..
(ii) Tricuspid
Ans:
(i) Between the left atrium and the left ventricle
(ii) Between the right atrium and right ventricle
3. Name the following
(i) Structure where the wave of contraction originates in heart to begin heartbeat
(ii) Structure connecting arteries with the veins
(iii) Blood vessel that brings oxygenated blood from the lungs to the heart
(iv) The blood vessel which collects and brings deoxygenated blood from brain and shoulder region to the heart
Ans:
- (i) Sino-atrial nodeĀ
- (ii) CapillariesĀ
- (iii) Pulmonary veinĀ
- (iv) Superior vena cava
INTEXT QUESTIONS 15.2
1. Name the following
(i) The term given to the production of blood cells
(ii) The three proteins present in the plasma
(iii) Cell fragments of blood involved in the clotting of the blood
Ans:
- (i) Haemopoiesis…
- (ii) Ablumin, globulin, and fibrinogen
- (iii) Platelets
2. Fill in the blanks
(i) Transfer of blood from donor to recipient is called ……..
(ii) Antigens are present on …….., and antibodies in the …….
(iii) People from blood group O can receive blood from blood group /groups
(iv) Blood pressure is measured by an instrument called The reading for a person with normal blood pressure will be around
Ans:
- (i) Blood transfusion
- (ii) Cell membrane of RBC; plasma
- (iii) Only from blood group O
- (iv) Sphygmomanometer, 120 ā 5 / 75 Ā± 5 mercury
INTEXT QUESTIONS 15.3
1. Fill in the blanks :
(i) The clear colourless liquid flowing out of the blood capillary walls is called
(ii) Lymphatic system consists of …….. lymph nodes and
(iii) A number of …….. are present in lymph nodes and attack bacteria
Ans:
- (i) Lymph
- (ii) Lymph ducts and lymph vessels
- (iii) Lymphocytes
2. Give one example of lymphoid organ in your body …..
Ans: Spleen or tonsils
3. Give two examples of Immuno Deficiency Syndrome .
Ans: SCID and AIDS
4. Name the two kinds of lymphocytes of your immune system
Ans: T-cells, B-cells
5. Name two heart-related disorders.
Ans: Hypertension, atherosclerosis, arteriosclerosis (any 2)
Additional Study Materials
- Chapter 06 Root system
- Chapter 07 Shoot system
- Chapter 08 Absorption, Transport, and Water Loss in Plants
- Chapter 09 Nutrition in plants – Mineral Nutrition
- Chapter 10 Nitrogen Metabolism
- Chapter 11 Photosynthesis
- Chapter 12 Respiration in Plants
- Chapter 13 Nutrition and Digestion
- Chapter 14 Respiration and Elimination of Nitrogenous Wastes
