The Ultimate Year 12 Biology Test

44 Questions | Total Attempts: 687

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The Ultimate Year 12 Biology Test - Quiz

Why did I make this? I don't know. The only thing I know is you should take the test. Good luck and have fun.


Questions and Answers
  • 1. 
    List all the components of a negative feedback system (in the order of process)
  • 2. 
    Explain why hyperventilation can result in alkalosis (insufficient CO2)
  • 3. 
    Explain the significance of reversible binding reactions of haemoglobin.
  • 4. 
    Describe blood glucose regulation with reference to the role of hormones.
  • 5. 
    Explain how the following parts of the nerve increases transmission of an impulse: Myelin sheath, Nodes of Ranvier, Dendrites
  • 6. 
    Explain the role of ion pumps during nerve impulses.
  • 7. 
    What is homeostasis?
    • A. 

      The body’s ability to regulate its internal environment despite external changes.

    • B. 

      The functions required for organisms to sustain life.

    • C. 

      The body's ability to control movement through a body system.

    • D. 

      The process of which the body absorbs nutrients.

  • 8. 
    Which one of these are true?
    • A. 

      Negative feedback takes in stimulus to reinforce a process until it reaches an end point. Positive feedback draws on stimulus to alter the process until it falls back into normal limits.

    • B. 

      Positive feedback takes in stimulus to reinforce a process until it reaches an end point. Negative feedback draws on stimulus to alter the process until it falls back into normal limits.

  • 9. 
    Which one of these are an accurate metaphor for a negative feedback system?
    • A. 

      The effect of fruit ripening on adjacent fruit

    • B. 

      Driving a car while observing speed limit

    • C. 

      Your dad patting your back and saying "well done son"

    • D. 

      Correlation of population growth vs births per year

  • 10. 
    What is the role of the hypothalamus and pituitary gland?
    • A. 

      The pituitary gland detects changes in the body and sends a response to the hypothalamus

    • B. 

      The hypothalamus is in charge of the endocrine system and the pituitary gland is in charge of the nervous system

    • C. 

      The pituitary gland is in charge of the endocrine system and the hypothalamus is in charge of the nervous system

    • D. 

      The hypothalamus detects changes in the body and sends a response to the pituitary gland

  • 11. 
    Which of these are the characteristics of the nervous system and NOT the endocrine system?
    • A. 

      Fast-acting

    • B. 

      Slow-acting

    • C. 

      Uses electro-chemical signals

    • D. 

      Uses chemical signals

    • E. 

      Involves the use of glands

    • F. 

      Travels through nerves

    • G. 

      Travels through the blood stream

    • H. 

      Regulates smooth muscle movement

    • I. 

      Has rapid effects

    • J. 

      Has long-lasting effects

  • 12. 
    List the components of the respiratory system
    • A. 

      Nostrils

    • B. 

      Lungs

    • C. 

      Pharynx

    • D. 

      Trachea

    • E. 

      Duodenum

    • F. 

      Larynx

    • G. 

      Oesophagus

    • H. 

      Alveoli

    • I. 

      Stomach

    • J. 

      Tongue

    • K. 

      Diaphragm

    • L. 

      Bronchus

  • 13. 
    Which of these statements are correct?
    • A. 

      The diaphragm contracts during inhalation to increase lung volume

    • B. 

      The diaphragm relaxes during inhalation to decrease lung volume

    • C. 

      The diaphragm contracts during inhalation to decrease lung volume

    • D. 

      The diaphragm relaxes during inhalation to increase lung volume

    • E. 

      The diaphragm doesn't move during inhalation

  • 14. 
    What allows inhalation/inspiration?
    • A. 

      Air entering the lungs, which has a lower volume than outside

    • B. 

      Air entering the lungs, which has a higher volume than outside

    • C. 

      The nose sucking in air particles

    • D. 

      The lungs pumping in air

  • 15. 
    How is oxygen and carbon dioxide transported?
    • A. 

      Passively diffused across all cells

    • B. 

      Through air pipes around the body

    • C. 

      Dissolved into lymphatic system

    • D. 

      Dissolved into the blood stream

  • 16. 
    What is blood pH determined by?
    • A. 

      Whatever the pH tester says, I guess

    • B. 

      Presence of oxygen

    • C. 

      Presence of carbon dioxide

    • D. 

      Presence of hydrochloric acid

  • 17. 
    Check all the actions that the blood pH regulation loop performs in the case of excessive CO2 (acidosis)
    • A. 

      Vasodilation

    • B. 

      Increased respiration

    • C. 

      Vasoconstriction

    • D. 

      Decreased respiration

    • E. 

      Decreased heart rate

    • F. 

      Increased heart rate

  • 18. 
    What is the role of the heart and lungs in gas regulation?
    • A. 

      The heart provide oxygenated blood and the lungs pump it around the body

    • B. 

      The lungs provide oxygenated blood and the heart pumps it around the body

    • C. 

      The heart pumps in oxygen and the lungs pump out carbon dioxide

    • D. 

      The heart pumps in carbon dioxide and the lungs pump out oxygen

  • 19. 
    What is the correlation between oxygen saturation in RBC's and oxygen level in blood?
    • A. 

      Higher oxygen levels in the blood increase PO2, causing oxygen to bind with haemoglobin.

    • B. 

      Lower oxygen levels in the blood decrease PO2, causing oxygen to bind with haemoglobin.

    • C. 

      Higher oxygen levels in the blood increase PO2, causing oxygen to bind less with haemoglobin.

    • D. 

      Lower oxygen levels in the blood decrease PO2, causing oxygen to bind more with haemoglobin.

  • 20. 
    Which of the following is FALSE?
    • A. 

      Both veins and arteries have endothelial cells.

    • B. 

      Arteries have elastin on the outside coating while veins do not.

    • C. 

      Both veins and arteries can stretch.

    • D. 

      Veins possess valves while arteries do not.

    • E. 

      Capillaries are one-cell thick.

  • 21. 
    List the organs that are part of the excretory system
    • A. 

      Lungs

    • B. 

      Bladder

    • C. 

      Stomach

    • D. 

      Penis

    • E. 

      Kidney

    • F. 

      Large intestine

    • G. 

      Liver

    • H. 

      Anus

    • I. 

      Urethra

  • 22. 
    What is the function of the ascending and descending limbs in the loop of Henle?
    • A. 

      The descending limb filters out water while the ascending limb filters out salts

    • B. 

      The descending limb filters out salts while the ascending limb filters out water

    • C. 

      Both the descending limb and ascending limb can filter out both

    • D. 

      What limbs?

  • 23. 
    How does ADH (Anti-diuretic hormone) work?
    • A. 

      Restricts blood flow into the kidneys

    • B. 

      Decreases the re-absorption of salt

    • C. 

      Increases the re-absorption of water

    • D. 

      Makes urination less frequent

  • 24. 
    Check the following factors that may trigger ADH to be released
    • A. 

      Sweating a lot on a hot day

    • B. 

      A low blood pressure

    • C. 

      A high blood pressure

    • D. 

      Drinking a large bottle of water in one go

    • E. 

      Not drinking water in a while

  • 25. 
    Which of the following present the reflex arc in the right order?
    • A. 

      Stimulus, sensory neuron, the brain, motor neuron, response

    • B. 

      Stimulus, receptor, sensory neuron, the brain, motor neuron, effector, response

    • C. 

      Stimulus, receptor, sensory neuron, relay neuron, motor neuron, effector, response

    • D. 

      Stimulus, receptor, effector, response

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