Zadanie 4c
Explain how calcium contributes to transmission at this junction.
- Materiał graficzny
Calcium-triggered neurotransmitter release
Explain how presynaptic depolarization causes calcium entry and stimulates release of transmitter-filled vesicles.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2022–2026.
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Zadanie 11
An action potential reaches a chemical synapse. Which immediate ion movement follows depolarization of the presynaptic membrane? A. Calcium enters through voltage-gated channels B. Calcium is expelled through newly opened channels C. Chloride is permanently…
Zadanie 3c
The diagram is a simplified model of a nerve cell communicating with a muscle fibre. Describe the events that release neurotransmitter from the presynaptic ending.
- Materiał graficzny
Zadanie 5b
Distinguish the presynaptic and postsynaptic membranes with two differences.
- Materiał graficzny
Zadanie 28
At which marked region would a chemical signal normally pass from one neuron to the next? A. D B. C C. A D. B
- Materiał graficzny
Zadanie 5a
Explain how an impulse in one neuron can cause a response in another neuron at a chemical synapse.
Zadanie 5a
Identify X.
- Materiał graficzny
Zadanie 5b
Outline how arrival of a signal stimulates neurotransmitter release.
- Materiał graficzny