Science Class 7th
41. Respiration is an Important process by which the body takes in life saving oxygen and releases the ________.
A) Carbon dioxide
B) Methane gas
C) Nitrogen
D) None of these
42. Breathing is a physical process, where gases are exchanged between the body and the surrounding with help of the _____________
A) Respiratory system
B) Digestion
C) Exhaling
43. Respiration or breathing is the _______ step, in which oxygen is taken in and carbon dioxide is released.
A) First
B) Second
C) Third
D) None of these
44. Nose consists of two cavities called_________.
A) Nostrils
B) Glottis
C) Trachea
45. Nostrils remain moist due to the presence of _________.
A) Mucus
B) Saliva
C) Both a & b
D) None of these
46. The _______ in the nostrils capture dust particles from the air inhaled and clean it.
A) Hairs
B) Organs
C) Cavity
D) None of these
47. Larynx is located in the _______.
A) Neck
B) Nose
C) Stomach
D) None of these
48. Larynx contain vocal cords which are_________ producing organs.
A) Sound
B) Water
C) Music
D) None of these
49. Trachea is also called the ______.
A) Wind pipe
B) Bronchus
C) Lungs
D) None of these
50. The opening of the trachea is called the glottis, which is covered by a flap called ____________.
A) Epiglottis
B) Glottis
C) Bronchioles
D) None of these
51. The trachea divides into two branches in the chest cavity, called______.
A) Bronchi
B) Esophagus
C) Lungs
D) None of these
52. Each bronchus enters into a lung and divides into smaller tubes called bronchioles which open into air sacs called _________.
A) Alveoli
B) Glottis
C) Both a& b
D) None of these
53. Each alveolus is surrounded by many ______.
A) Capillaries
B) Arteries
C) Trachea
D) None of these
54. Each lung consists of around 700 million ________which are surrounded by blood capillaries.
A) Alveoli
B) Trachea
C) Bronchus
D) None of these
55. Diaphragm is a very thick, dome shaped muscular membrane which separates the chest cavity from the ______.
A) Glottis
B) Abdominal cavity
C) Pharynx
D) None of these
56. When we inhale, the muscles between the ribs and diaphragm contract to expand the ________.
A) Chest cavity
B) Abdominal cavity
C) Pharynx
D) None of these
57. When we exhale, the diaphragm and muscles between the diaphragm and the ribs relax and come into a _________.
A) Resting position
B) Tired position
C) Both a & b
D) None of these
58. _______process energy release is vigorous and not under control.
A) Burning
B) Breathing
C) Enzymes
D) Both a & b
59. ______process energy release is slower and under control.
A) Breathing
B) Burning
C) Enzymes
D) Both a & b
60. Cellular respiration is a slow process which occurs at_______.
A) Body temperature
B) Climate temperature
C) Normal temperature
D) None of these