Explanation:
The myelin sheath, lipoprotein structure deposited around axons selected in inner nodules, interrupted periodically by Ranvier nodules, allows saltatory, rapid and effective conduction in the nervous system of vertebrates. The cells that construct myelin are the oligodendrocyte in the nervous central nervous system (CNS) and the Schwann cells in the peripheral nervous system. An oligonucleotide myelinates one or more axons, while the Schwann always forms a single myelin internodule. The process of myelination begins when a cell-sheath projection involves the axon and a loose spiral shape around it. Over time the formed layers are compacted by the expulsion of the cytoplasm and the formation of a lamellar structure with thick electrodes bands - derived from the apposition of the cytoplasmic phases of the membranes - and fewer electrodes - derived of the external phases of the membranes.
In the formation of LTP, the entry of Ca2+ ions into the neuron activates protein kinases, which are the enzymes that contribute to the increased AMPA conductance of the postsynaptic cell.
<h3>What is LTP?</h3>
- LTP or Long-Term Potentiation is a biological process due to which synaptic connections formed between different neurons grow stronger due to frequent activation.
- It can be defined as a way by which the responses of brain change along with the experience thus dealing with learning and memory in the hippocampus.
- It is caused by combining activity of presynaptic and postsynaptic neurons.
- During synapses, Ca2+ is release as a neurotransmitter from the presynaptic neuron. This Ca+ enters the postsynaptic neuron and activates protein kinases.
- The protein kinases increase the activity of AMPA receptors which plays an important role in neurotransmission through glutamate.
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The piece of cheese in the refrigerator had the least amount of chemical change.
- Moulding occurs on substances which are warm and moist
- Mold thrives in warm and humid places
- In refrigerators, the environment is cool and dry
- This environment hinders the growth of mold
- The bacteria and fungi require optimum temperatures to flourish, which is not present in a refrigerator
- The cheese placed outside and on the counter will grow mold as those environments do not arrest the growth of mold
- Refrigeration ensures that food is not spoilt
Therefore, the least amount of chemical change takes place on the cheese placed in the refrigerator.
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13 a
14. At which location would a person experience the longest number of daylight hours answer B
