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alex41 [277]
2 years ago
11

Explain what is positive geotropism​

Biology
1 answer:
spayn [35]2 years ago
8 0
The roots exhibit positive geotropism or growth with gravity, while the stem exhibits negative geotropism or growth against gravity.
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Small, electron-lucent vesicles known as synaptic vesicles (SVs) are grouped at presynaptic terminals. They hold neurotransmitters and exocytosis, which is stimulated by calcium, releases them. After exocytosis, SVs are formed locally at the terminals.

  • From the presynaptic cell with synaptic vesicles to the postsynaptic cell with neurotransmitter receptors, a signal always moves in one direction across the chemical synapse.
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  • Excitatory because it tends to depolarize the cell, this potential is known as an excitatory postsynaptic potential (EPSP).

learn more about synaptic vesicles here:brainly.com/question/5865840

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