Ligand-gated ion channels play important roles in relaying information between neurons at synapses. An outline of the structure of a synapse is shown in this diagram. Which of the following statements most accurately describes ligand-gated ion channels found at synapses?

A) The neurotransmitter ligand binds and opens the channel, and then the ligand-gated ion channel directly regulates ion flow into the cell receiving the neurotransmitters.
B) The neurotransmitter ligand binds and opens the channel, and then the ligand-gated ion channel directly regulates ion flow into the cell releasing the neurotransmitters.
C) The neurotransmitter ligand binds and either opens or closes the channel, and then the ligand-gated ion channel directly regulates ion flow into the cell releasing the neurotransmitters.
D) The neurotransmitter ligand binds and either opens or closes the channel, and then the ligand-gated ion channel directly regulates ion flow into the cell receiving the neurotransmitters.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

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flooding wildfire landslides climate change the factors listed have an immediate effect on the animal populations found in any habitat. the four factors would lead to a death. b emigration. eliminate c immigration. d mutations.

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.