Unit 5 Biology AQA

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  • Created by: Mankel19
  • Created on: 14-03-16 14:34

1. An example of negative feedback in the Oestrous Cycle is..

  • Progesterone harshly criticising Oestrogen's hard work on building the uterine lining
  • FSH stimulating LH to surge.
  • Low levels of Oestrogen inhibiting the production of FSH and LH
  • High levels of Oestrogen stimulating further FSH production.
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2. What ion binds to troponin, causing it to move tropomyosin to expose binding sites?

  • Ca2+
  • Na+
  • K+
  • e-

3. Slow-twitch muscle is red in colour due to...

  • Many capillaries providing oxygen and glucose for respiration.
  • Being thicker than fast-twitch muscle
  • Higher abundance of mitochondria
  • a high ability to store glucose as glycogen

4. The medulla oblongata increases impulse frequency, via the sympathetic nervous system,to the SAN when..

  • Carbon dioxide levels are too high in the blood plasma.
  • Blood pressure is too high.
  • Carbon dioxide levels are low in the blood plasma.
  • The organism is resting.

5. A random movement in response to a non-directional stimulus is known as..

  • Kinesis
  • Positive Feeback
  • Phototropism
  • Taxis
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