Stage _____ of NREM sleep represents the beginning of actual sleep.

Biology

1 answer:

djyliett [7]2 years ago

7 0

Answer: B. Two

Explanation:

During the first stage, your body starts relaxing and falling into sleep. This is the lightest stage of sleep. You can wake easily during this stage, and are not "fully" asleep.

During the second stage, your body deepens into it's sleep, your heart rate decreases, your body temperature decreases, and more. This is the stage that "represents the beginning of actual sleep" which is the answer to your question.

During the third stage, your body is in a deeper state of sleep. Your muscles relax further, your breathing rate slows, and more.

During the fourth stage, your heart rate and body temperature rise again. Your brain is a bit more active, and your muscles start to "wake up" slowly again.

Read more about NREM sleep here:

brainly.com/question/14410334

You might be interested in

The fruit fly, drosophila melanogaster (d. melanogaster) is an excellent model for studying fundamentals of development because?

lakkis [162]

Drosophila melanogaster an excellent model for studying fundamentals of development because many of the genes involved in the development of the fruit fly are also found in humans and the precise formation of each of their 959 body cells has been mapped.

Its many of the genes involved in the development of the fruit fly are also found in humans. Drosophila melanogasteris which is also called Fruit fly is small in size and minimal requirements, many fly's can be raised and tested within a small laboratory which does not have access time, space or funding.

Genetic factors also make this fly an ideal model organism. Drosophila melanogasteris only has four pairs of chromosomes compared to 23 pairs in humans.

To learn more about Drosophila melanogaster here

brainly.com/question/18763357

#SPJ4

5 0

1 year ago

What contains dissolved carbon? A- Atmosphere B- Sinks C- Oceans and lakes

alekssr [168]

Well, dissolved carbon is basically carbon, and carbon and other atmospheric gases dissolve in water. So that would most likely lead to the answer being oceans and lakes.

3 0

3 years ago

Carol is having a hard time attracting hummingbirds to her new feeder location. She is not sure if the reason is that the hummin

exis [7]

Answer:

She should hang up a feeder of the old food next to the feeder of new food to test which one they really like more.

7 0

3 years ago

What do astronomers believe is located at the center of the Milky Way galaxy?

Thepotemich [5.8K]

Understanding the nature and appearance of our galaxy is no small feat, for we live within a disk of obscuring gas and dust.Astronomers do not think that a supermassive black hole at the center of a galaxy is unique to the Milky Way. Rather, it appears to be quite typical of the almost innumerable galaxies in the observable universe. The fact that black holes may be the rule rather than the exception makes it even more important that we continue to study them.

3 0

3 years ago

Read 2 more answers

What evidence supports the hypothesis of interbreeding between neanderthals and homo sapiens?.

Len [333]

Answer:What evidence supports the hypothesis of interbreeding between Neanderthals and Homo sapiens? DNA analysis shows that about 2% of the genome of most modern humans came from Neanderthals.

Explanation:please give brainliest

5 0

2 years ago