A2 OCR Biology

UNIT 1 – Module 1Communication – Revision Quiz

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1. Define the term Homeostasis (2)

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2. Name an example of when positive feedback occurs in humans (1)

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3. Define the term ectotherm (1)

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4. Give two advantages of being an ectotherm (2)

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5. Name 4 physiological mechanisms used to maintain body temperature if it rises too high (4)

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6. Which part of the brain monitors blood temperature? (1)

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7. Give 3 examples of sensory receptor cells (3)

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8. At resting potential what is the charge across the membrane? (1)

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9. What do you call a small change in potential across a membrane which is not big enough to reach the threshold potential? (1)

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10.What channels open when an action potential is generated? (1)

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11.What does the sodium potassium pump move in and out of the cell, and how does it do it? (2)

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12.What do you call the period of time after an action potential when it is impossible to generate another action potential? (1)

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13.How would you describe the cell in term of potential during this time (1)

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14.What do you call the movement of ions along the neurone? (1)

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15.What type of cell makes up the myelin sheath? (1)

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16.How fast can a myelinated neurone conduct an action potential? (1)

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17.What word describes the way the action potential travels down a myelinated neurone (1)

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18.What is a synapse called that uses acetylcholine as its neurotransmitter? (1)

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19.How many protein subunits make up the sodium ion channel on the post-synaptic membrane? (1)

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20.What is the enzyme called that is found in the synaptic cleft? (1)

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21.What causes the vesicles to fuse with the membrane and release acetylcholine? (1)

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22.Give three roles of synapses (3)

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23.Explain the difference between exocrine glands and endocrine glands (2)

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24.Name the second messenger involved with the action of adrenaline pathway (1)

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25.Name the two types of hormone (2)

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26.Name one hormone or group of hormones released from the adrenal cortex (1)

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27.Give three effects on the body of adrenaline (3)

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28.Name two enzymes found in the pancreatic juice (2)

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29.Name the two types of cell found in the islets of langerhans and what hormones they produce (2)

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30.What is the proper biological name for liver cells? (1)

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31.What Is the term used to describe when your blood glucose levels get too high? (1)

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32.Give two risk factors for type II diabetes (1)

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33.What causes the potassium channels to close in the beta cells? (1)

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34.Where in the brain is the cardiovascular centre located? (1)

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END OF TEST

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