Unit 5 Biology AQA

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

1. 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.
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Other questions in this quiz

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

  • Positive Feeback
  • Kinesis
  • Taxis
  • Phototropism

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

  • Progesterone harshly criticising Oestrogen's hard work on building the uterine lining
  • Low levels of Oestrogen inhibiting the production of FSH and LH
  • High levels of Oestrogen stimulating further FSH production.
  • FSH stimulating LH to surge.

4. What ion binds to troponin, causing it to move tropomyosin to expose binding sites?

  • e-
  • Ca2+
  • K+
  • Na+

5. Which bands of the sarcomere decrease in length during contraction?

  • Just the H-zone
  • I-band, A-band and H-zone
  • I-band and H-zone
  • I-band and A-band

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