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vovangra [49]
3 years ago
13

How many hours of sleep do you really need?

Biology
1 answer:
otez555 [7]3 years ago
3 0
According to the National Heart, Lung, and Blood Institute, adults need around seven to eight hours. For teenagers they recommend nine to ten, and at least ten for children.
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What is a conifer tree
Step2247 [10]

Conifer tree is the tree that the leaf is slender like needle, it is evergreen tree more, material is general softer, some contain colophony , reason calls soft material again, its grows in elevation 100 ~ 1500 meters commonly, have economy and ornamental value.Conifers appeared 280 million years ago before any other trees.Conifers are believed to be the oldest trees on earth。

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2 years ago
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What are some interesting things about granite?
Oksana_A [137]

Answer:

Granite is like a mix of color and it looks nice amd modern, and marble is a nice clam looking thing.

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3 years ago
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Neurons in the parasympathetic pathway use which neurotransmitters?
Kay [80]
<h2>Acetylcholine</h2>

Explanation:

  • Acetylcholine is a chemical that is found between the nerve synapses, or gaps, between nerve cells. When activated, it causes the contraction of skeletal muscles and activates glandular functions in the endocrine system. Think of acetylcholine as a mailperson; residents cannot receive their mail until he or she comes and delivers it to the mailbox. Like mailpersons who deliver the mail and move on to the next house, acetylcholine acts quickly and does not hang around. As a result, acetylcholine is rapidly broken down by another chemical substance called cholinesterase.
  • Acetylcholine was the first neurotransmitter scientists discovered, as well as the most abundant neurotransmitter in the body. A neurotransmitter is a chemical that is released by a neuron, or nerve cell, that sends a signal to another neuron across a synapse. The neurotransmitter binds to receptors to affect how the signal is received. The purpose of the neurotransmitter is to either amplify or inhibit the signals sent between the neurons.
  • Acetylcholine plays an important role in the signal of muscle movement, sensation of pain, learning and memory formation, the regulation of the endocrine system and rapid eye movement (REM) sleep cycles.

5 0
3 years ago
What is a Organelle?
Elenna [48]

Answer: Any of a number of organized or specialized structures within a living cell.

Explanation: Hope this helps

7 0
2 years ago
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One possible result of chromosomal breakage is for a fragment to join a nonhomologous chromosome. What is this type of chromosom
Aleks04 [339]

One possible result of chromosomal breakage is for a fragment to join a nonhomologous chromosome. What is this type of chromosomal alteration called <u>translocation.</u>

A chromosomal fragment is translocated when it is moved from one genomic sequence to another. Around two nonhomologous chromosomes, a translocation mechanism takes place in order to permit the interchange of fragments created by chromosomal breakage.

When a segment of one chromosome separates and affixes towards another chromosome, translocation takes place. If there is neither genetic material growth nor loss in the cell, such a form of rearrangement would be referred to as balanced.

To learn more about nonhomologous chromosome here

brainly.com/question/18765644

#SPJ4

4 0
1 year ago
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