the first answer is D and the second I believe is A
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.
Learn more about LTP here:
brainly.com/question/14879971
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Answer:
B) Viruses are killing some of his B cells and becoming incorporated into the genomes of others.
Explanation:
Epstein-Barr virus causes infectious mononucleosis by following mechanism.
1) Epstein-Barr virus attaches to and infects epithelium of the throat where it replicates and causes pharyngitis.
2) Virions enter the lymphoid vessels and are carried to the lymph nodes. Some virions escape the lymphnode trap and are carried to the bloodstream.
3) Virions attach specifically to B lymphocytes and infect them, producing either latent infection or productive infection.
4)The infected B lymphocytes actively replicate and differentiate into cells producing random immunoglobulins.
5)T cells respond to infection and destroy the lymphocytes replicating EBV vitus.
6) Latently infected B lymphocytes become immortal. They are not attacked by T cells.
Answer:
A limiting factor is anything that constrains a population's size and slows or stops it from growing. Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources.
Answer:
the cylindrical bundle of nerve fibers and associated tissue which is enclosed in the spine and connects nearly all parts of the body to the brain, with which it forms the central nervous system.
