1. What do antagonistic drugs do to synaptic transmission?
- stimulate release of neurotransmitter from presynaptic neurone so more receptors are activated
- They block receptors so they cant be activated by neurotransmitters
- inhibits the enzyme that breaks down neurotransmitters
- More receptors are activated as drugs same shape as the neurotransmitters
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Other questions in this quiz
2. What is electrophoresis?
- Separates RNA fragments to make a fingerprint
- Separation of DNA fragments to make a genetic fingerprint
- The combination of smaller DNA fragments to make a genetic fingerprint
- Splitting of DNA with light
3. Which of these is the cloning of a gene outside a living organism?
- In vevo
- In vitro
- In vivo
- En vitro
4. Do chemical mediators stimulate local response or widespread response?
5. What is hyperpolarisation?
- When ion channels are reset.
- When potassium ion channels are slow to close so there is a slight overshoot where too many potassium ions diffuse out of the neurone. The potential difference becomes more negative than the resting potential
- When sodium ion channel close and potassium ion channels open. The membrane is more permeable to potassium so potassium ions diffuse out of the neuroe
- If the potential reaches the threshold value, more sodium ion channels open. More sodium ions diffuse into the neurone.
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