Biology Circulatory and Sense Organs – PDF Material for SSC & RRB Exams
Biology Circulatory and Sense Organs – PDF Material for SSC & RRB Exams
1. _________ is a special connective tissue consisting of a fluid matrix, plasma, and formed elements – blood
2. What are needed for clotting or coagulation of blood – fibrinogens
3. Plasma without the clotting factors is called – Serum
4. The liquid part of the blood is called – Plasma
5. Three important plasma proteins are – albumin, globulin, fibrinogen
6. The red pigment in RBCs that carries oxygen is called – Haemoglobin
7. The term ______ is used to describe a number of disease conditions caused by the inability of RBCs to carry a sufficient amount of oxygen – Anemia.
8. If the body produces an excess of RBCs, the condition is called- Polycythemia.
9. What type of WBCs, produce antibodies to fight microbes – B lymphocytes
10. Prothrombin activator and the mineral _____in the blood convert prothrombin to thrombin in blood clot formation – calcium
11. Thrombin converts the inactive plasma protein _____into a fibrous gel called ______. – fibrinogen, fibrin
12. Vitamin ______ stimulates the liver to increase the synthesis of prothrombin. – vitamin K
13. If part of the blood is dislodged and circulates through the bloodstream, it is called an – embolus
14. ______ is a foreign substance that can cause the body to produce an antibody – antigen
15. A person with type AB blood has _____antigens on the blood cells and _____antibodies in the plasma – A and B
16. A person with type B blood has _____antigens on the blood cells and _____antibodies in the plasma – B, anti-A
17. Type _____blood is considered the universal donor – type O, Rh negative
18. Type _____blood is considered the universal recipient – type AB, Rh positive
19. A condition called _____can develop if a Rh negative mother produces antibodies against an Rh-positive fetus – erythroblastosis fetalis
20. The two types of connective tissues that make blood cells are – myeloid, lymphatic
21. Abnormal low white blood cell count -Leukopenia
22. An abnormal high white blood cell count – Leukocytosis
23. An abnormal low level of platelets – Thrombocytopenia
24. An inherited disorder in which a small amount of haemoglobin is produced, can be major or minor – Thalassemia
25. A type of anemia that produces abnormal haemoglobin and red blood cell deformities – Sickle cell anemia
26. Damage to the heart cells due to lack of blood flow – Myocardial infarction
27. The heart valve located between the right atrium and right ventricle is called the – Tricuspid
28. When the heart is relaxing, it is said to be in – Diastole
29. When the heart is contracting it is said to be – Systole
30. Another word for the visceral pericardium is the – epicardium
31. The largest artery of the body is the – aorta
32. The largest vein in the human body is the – inferior vena cava
33. The largest internal organ is the – liver
34. RBCs have an average life span of – 120 days
35. Leucocytes are also known as – white blood cells (WBC)
36. Blood normally contains – 1, 500, 00-3, 500, 00 platelets mm–3
37. ___________play a very important role in clotting. Calcium ion
38. Amphibians and the reptiles have a 3-chambered heart except – crocodiles
39. A patch of this tissue is present in the right upper corner of the right atrium called the – Sino-atrial node
40. Our heart normally beats how many times in a minute. – 70 -75
41. __________-is a graphical representation of the electrical activity of the heart during a cardiac cycle – ECG
42. The _____________wave represents the electrical excitation (or depolarisation) of the atria- P wave
43. The ________-wave represents the return of the ventricles from excited to normal state (repolarisation) – T wave
44. The blood pumped by the right ventricle enters the – pulmonary artery,
45. The deoxygenated blood pumped into the pulmonary artery is passed on to the ____________ from where the oxygenated blood is carried by the pulmonary veins into the left atrium – lungs
46. A unique vascular connection exists between the digestive tract and liver called – hepatic portal system.
47. The _________ – vein carries blood from intestine to the liver before it is delivered to the systemic circulation. – hepatic portal vein
48. What is the organ that pumps blood all throughout the human body – heart
49. Oxygen-rich blood flows from the left upper atrium into the – left lower ventricle.
50. The coloured part of the eye is called the – iris.
51. The white part of the eye is a tough outer layer called the – sclera
52. The body’s largest organ – skin
53. Aqueous chamber is smaller in size and is filled with a water-like substance, called – aqueous humor
54. The vitreous chamber is located between the lens and the retina. It is filled with a jelly like protein, called – vitreous humor
55. The sensory receptors for taste are located inside small bumps on the tongue, known as – papillae.
56. The inner most layer of an eye is called – Retina
57. What are the receptors for scotopic vision (night vision ) – Rods
58. what are the receptors for photopic (day light) vision – cones
59. _________ refers to the process of adjusting to bright light after exposure to dim light. – Light adaptation.
60. The rods have a photo -sensitive chemical substance is called- Rhodopsin
61. _________ is a cartilaginous funnel-shaped structure that collects sound waves from the surroundings – Pinna
62. The smallest bone in our body – stapes in ear
63. The inner ear has a complicated structure known as – membranous labyrinth
64. A lymph-like fluid is found in the space between bony labyrinth and membranous labyrinth. This is called – perilymph
65. The bony labyrinth has three semi-circular canals at right angle to each other, a cavity, called -vestibule
66. The cell body contains cytoplasm with typical cell organelles and certain granular bodies called- Nissl’s granules
67. The ____________ transmit nerve impulses away from the cell body to a synapse or to a neuro-muscular junction __ Axon
68. The site for processing of vision, hearing, speech, memory, intelligence, emotions and thoughts – brain
69. The _________ – contains several centres which control body temperature urges for eating and drinking. – hypothalamus
70. The midbrain is located between – the thalamus/hypothalamus of the forebrain and pons of the hindbrain.
71. The dorsal portion of the midbrain consists mainly of four round swellings (lobes) called corpora quadrigemina
72. the photosensitive compounds (photopigments) in the human eyes is composed of – opsin (a protein) and retinal.
73. What is the structural unit of nervous system ? -Neuron
74. Important function of spinal cord – control of reflex action
75. Which of the following regulates involuntary action – Medulla Oblongata
76. which part of the brain maintains the balance of the body? – cerebellum
77. Which part of the brain controls sight, hearing, touch, smell, taste ? – cerebrum
78. The number of spinal nerves in our human body is – 31 pairs
79. The number of cranial nerves in our human body is – 12 pairs
80. The largest part of the human brain. – cerebrum or cortex is the
81. Which of the following is known as small brain – cerebellum
82. How many major sense organs in our body ?- 5
83. The eye is protected from sun light and dust by – Eye brows, eye lashes, Eye lids
84. The eye ball moves with the help of – Six Muscles
85. Cornea is covered by thin transparent protective coat called – conjunctiva
86. Iris is present below the -cornea
87. A central aperture called pupil is present in the – Iris
88. The blood vessels that supply blood to the walls of the heart are called -coronary arteries
89. The average heart beat in adult persons is – 70 to 80 per minute
90. RBC produced in – bone marrow
91. How many litres of blood has adult man – 5 litres
92. what is the chief organ of the blood circulatory system- heart
93. The colour of skin and hair is determined by the – melanin
94. People who have not melanin pigment have white skin and are called – Albinos
95. Which of the following prevents the skin from becoming dry – Sebum
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