What controls circadian rhythms in humans? Explain how this process works.

Answers

Answer 1
Circadian rhythms are regulated by small nuclei in the middle of the brain. They are called the suprachiasmatic nuclei (SCN). Nuclei act as control centers. The SCN are connected to other parts of the brain.

Related Questions

what needs to occur for a fluorescent mineral to give off light?

Answers

Fluorescent minerals contain particles in their structure known as activators, which respond to ultraviolet light by giving off a visible glow. Ultraviolet light is a form of electromagnetic radiation invisible to the human eye. There are two classified ultraviolet wavelengths: longwave and shortwave.

How does cell division occur in prokaryotes?

Answers

Answer:

How does cell division occur in prokaryotes? - Cell division occurs through a process call binary fission in which the DNA is copied, the cell membrane pinches inward to split and form 2 genetically identical cells. Examples include ecoll and some types of bacteria

Hope this helps :)

the largest and most numerous of the glial cells in the central nervous system are the

Answers

the mitochondria and the choroplast

Answer:

The largest and most numerous of the glial cells in the central nervous system are the astrocytes

Explanation:

hope this helps!

What is the difference between a synthesis reaction and a digestion reaction?

Answers

Answer:

Explanation:

Synthesis reactions occur when two different atoms or molecules interact to form a different molecule or compound

Digestion reaction is when its  broken down into glucose by a type of chemical reaction called hydrolysis

How is real life fingerprinting different from the techniques used on CSI?

Answers

CSI used various techniques for fingerprinting like powder dusting, iodine fuming, silver nitrate soaking, etc to determine the fingerprint of criminals.

What do you mean by CSI?

CSI stands for Crime Scene Investigation. It is a brach that investigates crime scene evidence.

Real-life fingerprinting does not involve critical techniques for identification. While CSI performs various techniques and is able to find the most similarity between the real criminal involves in any violent activity.

Therefore, CSI used various techniques for fingerprinting like powder dusting, iodine fuming, silver nitrate soaking, etc to determine the fingerprint of criminals.

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Real-life fingerprinting differs from CSI techniques. While CSI portrays fingerprint analysis as rapid and foolproof, reality involves a slower and more nuanced process.

Real-life fingerprinting is a more involved process than the quick and ostensibly error-proof fingerprint analysis seen on CSI. CSI frequently depicts fingerprint matching as a straightforward database search that produces instant identification. However, in the actual world, fingerprint analysis is carried out by skilled experts who painstakingly check ridge patterns, minute spots, and other traits to assure precise matches. To avoid mistakes, this procedure can be time-consuming and requires knowledge.

In addition, the way that huge, networked databases are shown in CSI oversimplifies reality. Although modern technology makes fingerprint comparison easier, the vast network of records that are easily available is more fantasy than reality. Real-world law enforcement databases are subject to stringent guidelines and restrictions.

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a section of a dna molecule that controls the thumb is called a

Answers

Answer:

gene

Explanation:

which organism is made up of one prokaryotic cell?

Answers

Answer:

Bacteria

Explanation:

Name the following:
The cell that covers a large area and is broad and flat in shape.​

Answers

Answer:

skin is the answer please and brainlest pleaaasssseeee

4. Use the atomic model below to answer the following questions: 1 pt for each blank





How many protons?


How many neutrons?


What is the name of this atom?

Answers

Answer:

for first 1 its 3 nuetros i think

The first is 7

The second is 8

And the last is 27

What is celebrated on 29th of July?

Answers

Answer:

my birthday just joking

the ans is world tiger day

Answer:

A lot of things are celebrated on 29th of July, and one thing is Global Tiger Day

Explanation:

Which best describes convention

Answers

Answer:a way in which something is usually done, especially within a particular area or activity.

Explanation:"the woman who overturned so many conventions of children's literature"

Which diagram below shows the process of meiosis - Diagram A or Diagram B? How do you know? Explain all the details that prove you are correct.

Answers

B. Meiosis is division of a cell from diploid number of chromosomes to haploid number of chromosomes. This type of division is used for gametogenesis-or making of sex cells. If we look at the starting number of chromosomes, we see 4, then at the end of the diagram we see four cells each with 2 chromosomes.

From the diagram, meiosis is shown by the diagram in B in the question.

What is meiosis?

Meiosis occurs when a cell divides in such a way that each daughter cell gets only half of the number of chromosomes in the parent cell.

Looking at the cell division in diagram B, we can see that there are only two chromosomes in each daughter nuclei out of the four chromosomes in the parent nuclei hence that us meiosis.

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Someone plz help me :(

Answers

I believe it’s A! Eukarya do have a nucleus.
Eukaryotic cells are not ALL multicellular, because they can be unicellular too. They are definitely not made up of prokaryotic cells.
As I said before, they have a nucleus so it’s not D. It’s A! Hope this helped, Good luck!!

In your own words, explain how a single molecule of glucose is converted into ~30 or more molecules of ATP in cellular respiration

Answers

Answer: Throughout the stages of cellular respiration

Explanation:

Fair warning I'm only a college freshman so you may be able to find more detailed answers than what I'm about to give you.

During cellular respiration there are a number of processes that must be taken into account when dealing with a glucose molecule.

Glycolysis: The molecule of glucose is a  6-carbon molecule, in this process that takes place in the cytoplasm of the cell, it is split into two 3-carbon molecules, these are pyruvates, during this, 2 ATP is made as a byproduct(along with 2 NADH molecules but I'll just focus on the ATP moving forward).

Transformation of pyruvate: For eukaryotic cells, the pyruvate molecules from Glycolysis are transferred into the mitochondria, which of course are sites for cellular respiration. With Oxygen available, aerobic respiration would continue but if not, fermentation would take place which would drastically reduce total ATP reduction throughout one cycle. The pyruvates are transformed into a 2-carbon acetyl group which is then oxidized and now compatible for Coenzyme A to pick up, which results in the compound Acetyl Coenzyme A. This process ends up producing 1 NADH molecule from the reduction of NAD+ due to the 2 carbon molecule being oxidized.

Citric Acid Cycle: This stage begins as soon as Acetyl CoA combines with a 4-carbon molecule called Oxaloacetate which ends up forming citric acid, that has 6-carbon atoms. Long story short the citric acid goes through a great number of reactions that produces a total of 2 ATP molecules.

Oxidative Phosphorylation: This stage of aerobic respiration consists of the electron transport chain and chemiosmosis process. The energy of NADH and FADH2 molecules that were produced in the Citric Acid Cycle is what's used to create the final majority of ATP molecules within this whole process. 1. Throughout the electron transport chain, excited electrons move along its network in the inner membrane of the mitochondria. As it moves, molecules it passes by uses the electrons energy to pump Hydrogen ions/protons from the inner membrane towards the intermembrane space. This transfer of ions creates an electrochemical gradient which is necessary for the synthesis of ATP in the following process, Chemiosmosis. The Electron Transport Chain produces about 2-3 ATP. 2. In Chemiosmosis, the newly formed electrochemical gradient causes the gathered Hydrogen ions to flow from the intermembrane space into the matrix, therefore lowering the its concentration(search up a image of this if you need to). This flow is thanks to and mediated by ATP synthase. Finally ATP synthase accepts 3-4 Hydrogen ions so an inorganic phosphate group can react with an ADP (Adenosine diphosphate) compound to produce one ATP molecule. In total, 24-28 molecules of ATP is formed.

This is how a single molecule of glucose can produce more than 30 molecules of ATP in aerobic cellular respiration. Fermentation on the other hand, would most likely produce half of which aerobic respiration would produce.

When ATP releases some energy, it also releases inorganic phosphate. What purpose does this serve (if any) in the cell

Answers

It transfers gamma phosphate to the pump protein in a process called phosphorylation.

Which of the following statements is TRUE?

Bell's palsy comes on suddenly.
The worst symptoms associated with Bell's palsy occur within 48 hours.
Bell's palsy usually requires no treatment in order to recover.
*All of the above

Answers

Answer:

d. All of the above

Explanation: is correct

Answer: all of the above

Explanation:

1.
Choose which of Newton’s laws of motion is occurring in the boundary type’s situation.

Two plates that slide past each other build up stress that is released as an earthquake.
1st Law of Motion
2nd Law of Motion
3rd Law of Motion

Answers

Answer:

3rd Law of Motion

Explanation:

Answer: newton’s 1st law of motion

Explanation: Inertia states that an object that is at rest will stay at rest and an object that is in motion will stay in motion unless acted on by an unbalanced force.

explain how the internal parts of a leaf are adapted for photosynthesis​

Answers

Explanation:

Leaves have a large surface area so more light hits them. The upper epidermis of the leaf is transparent, allowing light to enter the leaf. The palisade cells contain many chloroplasts which allow light to be converted into energy by the leaf.

Sunlight helps our bodles to produce Vitamin D. In some areas of the United States, there is not enough sunlight during the winter mont
support this process. What is on thing you would recommend to people who live in those areas?
O A. Drink juice that is pasteurized with Vitamin D.
O B. Eat more proteins that bulld Vitamin D.
O C. Drink soymilk that is enriched with Vitamin D.
O D. Eat more carbohydrates that bulld Vitamin D.

Answers

Answer:

It would be the first one

Explanation:

A lot of juices are pasteurized with Vitamin D it can be V8, orange juice, grape juice, cranberry juice, etc.

DNA molecules separate into single strands which are then used to construct two identical strands of DNA this process ensures genetic

A)consistency
B)variability
C)diversity
D)reduction

Answers

Answer: A)consistency

Explanation:

Genes from genetically modified corn frequently move to non-genetically modified corn plants because of outcrossing. This is a major concern to ______. Multiple choice question. transgenic crop manufacturers because outcrossing can lead to loss of introduced genes from transgenic plants herbicide manufacturers because of the potential for the evolution of super weeds organic farmers, whose fields are close to transgenic corn, because transgenic crops cannot be certified as organic

Answers

This will  be a major concern to transgenic crop manufacturers because

outcrossing can lead to loss of introduced genes from transgenic plants.

Outcrossing involves the process of crossing two different breeds thereby

introducing unrelated genetic material into it.

Crop manufacturers will be concerned if the genes from genetically modified

corn frequently move to non-genetically modified corn plants because as time goes on, the trait which made the genetically modified corn will be lost as different variations and more dominant traits will make such traits recessive and lost.

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What is the main issue with traditional classification?

Answers

Answer:

A major problem is that classifying according to overall similarities can be misleading. For example, dolphins could be mis-classifed as fishes because they have fins, but dolphins are mammals, not fishes.

Explanation:

A(n) ______ gene is a type of gene that regulates development and that, when mutated, leads to organisms with structures in abnormal or unusual locations on their body.

Answers

A (n) homeotic gene is a type of gene that regulates development and that, when mutated, leads to organisms with structures in abnormal or unusual locations on their body.

A homeotic gene is a gene that intervenes in the developmental program that determines the location of structures along the anteroposterior axis.

The determination of the anteroposterior axis is one of the earliest events in development, and it guides the remaining processes of organogenesis.

Once homeotic genes define the identity of the body segments, they code for proteins (homeodomain) that are responsible for activating other genes.

These genes ultimately trigger the formation of the organs or limbs of this segment.

Genes that control the position of organs have been called homeotic genes, while mutations that affect these genes are known as homeotic mutations.

Therefore, we can conclude that homeotic genes are expressed in the body regions that will house the growing structures.

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how many DNA molecules were in the beginning of the gif?

Answers

Answer:The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides

Explanation:

i just did :)

What is an index fossil?
A. A fossil that contains rocks and minerals
B. A fossil that formed 300 million years ago
C. A fossil that has vestigial structures
D. A fossil found in rocks from one time period

Answers

Answer:

a fossil that is useful for dating and correlating the strata in which it is found.

Explanation:

Maybe D I hope it helps you

wha molecules absorbs sunlight for photosynthesis

Answers

Explanation:

The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas.

distinguish between uric acid, urea and ammonia​

Answers

Answer:

Explanation:

Ammonia is associated with aquatic animals; urea is associated with most terrestrial and semiterrestrial vertebrates, but rarely land invertebrates (Campbell et al., 1972); and uric acid is the major product of terrestrial invertebrates, birds and reptiles (Prosser & Brown, 1961).

How can the locations where ancient fossils are found to be used as evidence for continental drift?

Answers

Answer:

his continental drift

Explanation:

Wegener used fossil evidence to support his continental drift hypothesis. The fossils of these organisms are found on lands that are now far apart. ... Wegener suggested that these creatures were alive in warm climate zones and that the fossils and coal later had drifted to new locations on the continents.

the genes stc1 and stc2, which share a common ancestor, are found in both zebrafish and humans. all four stc genes display similar patterns of exon and intron sequences. based on these facts, what is the most likely explanation for the origin of stc genes?

Answers

Based on these facts, we can state that the genes of the two organisms had a eukaryotic origin.

We can arrive at this answer because:

Despite having exons, prokaryotes do not have introns in their genomes.This means that if two organisms have the same sequence of introns and exons, they have a common ancestor, in addition to having their genes originated in a eukaryotic organism, which explains the sequence of introns.

This means that the genetic expression of these two organisms has similarities, even if they are organisms with different biological processes.

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If I'm on an elevator that breaks loose and plummets down the shaft, can I avoid harm by jumping at the last second?

Answers

Answer:

It sounds like it would work but it wont. you need to lay down for the safest

Explanation:

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