The Ultimate Year 12 Biology Test
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.
- 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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