1st Semi-Examination- SCIENCE 9
  • 1. It is the part of the respiratory system where gas exchange takes place.
A) bronchi
B) cells
C) alveoli
D) bronchioles
E) trachea
  • 2. It is the part of the respiratory system that is commonly called as "voice box".
A) larynx
B) trachea
C) mucus membrane
D) pharynx
E) esophagus
  • 3. It is a common viral infection of the upper or sometimes lower respiratory system.
A) cough
B) pneumonia
C) cold
D) COVID
E) emphysema
  • 4. what is the other term for cancer in the blood?
A) leukemia
B) sarcoma
C) anemia
D) none of the above
E) all of the above
  • 5. It is a high pressure of blood against the arterial wall due to the narrowing of the arterial diameter.
A) Normal blood pressure
B) none of the above
C) Low blood pressure
D) stage 1 Hypertension
E) High blood pressure
  • 6. How can you categories a blood pressure of 110/70?
A) normal
B) high BP
C) low BP
D) none of the above
E) below normal
  • 7. In what category of blood pressure is 135/85?
A) Stage 1 hypertension
B) Stage 2 hypertension
C) Stage 4 hypertension
D) Stage 5 hypertension
E) Stage3 hypertension
  • 8. which of these type of blood has no antigen at all?
A) type O
B) type B
C) type Z
D) type AB
E) type A
  • 9. which of these types of blood is considered as the universal donor?
A) type AB
B) type B
C) type A
D) type Z
E) type O
  • 10. which of these types of blood is the antidote for blood type A?
A) type B
B) type Z
C) type A
D) type O
E) type AB
  • 11. what type of blood you can give to a patient with type B blood which is not available in the hospital?
A) type B
B) type AB
C) type O
D) type Z
E) type A
  • 12. it is the most hardworking organ in the body.
A) muscles
B) stomach
C) brain
D) heart
E) bones
  • 13. this organ is responsible for the exchange of oxygen and carbon dioxide.
A) muscles
B) heart
C) lungs
D) cells
E) brain
  • 14. It is a chemical process which takes place at the cellular level and produces energy.
A) exhalation
B) inhalation
C) excretion
D) breathing
E) respiration
  • 15. It is the physical process of exchanging gases in the lungs.
A) inhaling
B) meditating
C) exhaling
D) respirating
E) breathing
  • 16. All but one is the short term negative effect of mouth breathing.
A) dry mouth
B) arc dentures
C) drooping eyes
D) sleep apnea
E) lack of energy
  • 17. it is the most serious long term effect of mouth breathing.
A) sleep walking
B) sleep apnea
C) lack of energy
D) drooping eyes
E) narrowed dental arc
  • 18. It act as a filters as the dust in the air enters in the nose.
A) membrane
B) mucous membrane
C) mucous membrain
D) mucous or cilla
E) mucous member
  • 19. All but one are the parts of the circulatory system.
A) heart
B) blood vessels
C) circulating fluids
D) aorta
E) lungs
  • 20. What do you call to the smallest veins in the body?
A) arterioles
B) arteries
C) venules
D) veins
E) venioles
  • 21. which two structures that trachea lead to in the lungs?
A) pleural cavity
B) bronchi
C) lungs
D) pleural membrane
E) bronchioles
  • 22. What happens when we exhale (breathe out)?
A) The diaphragm relaxes and moves upwards
B) the diaphragm contracts and move downwards
C) none of the above
D) The diaphragm contracts and moves upwards
E) The diaphragm relaxes and moves downwards
  • 23. During exercise, what happens to breathing in humans?
A) The breathing rate increases but not the depth of breathing
B) The depth of breathing decreases but not the breathing rate
C) The depth of breathing increases and the breathing rate increases
D) The depth of breathing increases but not the breathing rate
  • 24. it is the blood vessels that carries oxygenated blood away from the heart.
A) arterioles
B) artery
C) veins
D) venules
  • 25. it is the blood vessels that carries deoxygenated blood towards the heart.
A) arterioles
B) venules
C) artery
D) veins
E) venioles
  • 26. it is the common ailment of the blood which is deficits in the production of hemoglobin.
A) low BP
B) high BP
C) leukemia
D) anemia
  • 27. It is the bodies automatic protection which heals itself when the balanced is not disturbed.
A) changing
B) recovering
C) healing
D) clotting
  • 28. It is a component of blood which became activated when in contact with damaged blood vessel.
A) WBC
B) leukocytes
C) platelets
D) RBC
E) thrombocytes
  • 29. It is a component of blood that produces antibodies that acts against foreign materials that enters the body.
A) WBC
B) all of the above
C) RBC
D) platelets
  • 30. It is the color of the deoxygenated blood.
A) greenish red
B) bluish red
C) dark red
D) bright red
  • 31. It is the permanent change of DNA sequence due to some environmental factor such as exposure to chemicals.
A) variation
B) fertilization
C) alleles
D) mutation
E) codominance
  • 32. It is the variant form of genes that causing a trait to be expressed.
A) alleles
B) multiple alleles
C) dominant alleles
D) recessive alleles
E) sex linked traits
  • 33. It is expressed more in physical appearance and masks the effect of the allele for the same traits.
A) codominance
B) incomplete dominance
C) dominant allele
D) alleles
E) recessive allele
  • 34. It is a situation in which both alleles are equally strong and both alleles are visible in the hybrid genotype.
A) incomplete dominance
B) alleles
C) recessive alleles
D) codominance
E) dominant alleles
  • 35. It is a branch of science that deals with the study of heredity.
A) genetics
B) genealogy
C) heredity theory
D) genes
E) meteorology
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