I just bombed this test and i have 1 retake left. please help!!

I will put the events in order and further explain what happens to gaseous exchange during exercise.

During exercise,

- Blood CO2 increases,

- Blood becomes more acidic-PH decreases below the set point,

- Brain stem detects PH change,

- Brain cell signals muscles in the diaphragm and rib cage,

- Breathing level increases,

- Amount of CO2 exhaled increases,

- Blood PH returns to the set point.

During exercise,the cells of the muscles respite more than when the body is at rest.Heart rate increases abd,more oxygen is used or required and more CO2 is exhaled.

The rate and depth of breathing increases and this is in a bid for the body to compensate by making sore that more oxygen is absorbed into the blood as well as remove more carbondioxide

When CO2 combines with water, carbonic acid is formed,this makes the blood to become acidic.

Therefore,when CO2 is present in the blood,it decreases the blood PH and an excess of it (PH less than 7.35) will result in Acidosis.

Answer:

The correct answer is - The neuron's intracellular charge must get more positive to meet a certain  thresh hold in order to depolarize. If the neuron does not hit that threshold, then the  neuron will not fire

Explanation:

In neuroscience, the depolarization of neurons shows the all or none law which is also called as all or nothing response. It states that all action potentials have the same size and the potential or strength of a nerve cell does not depend on the stimulus strength as all are the same size.

If a stimulus reaches a particular threshold cell or fiber will fire so either it will fire or not cross the threshold this is all or nothing response or law and depolarization is an example of it.

Answer:

The answer is either B or C

Explanation:

emilythompson35464

hope this helps srry if it doesn't tho

Answer:

B. It shows how the rocket performs in the atmosphere, but not in space

Explanation:

This is actually not as complicated as it may seem. Wind tunnels are a way that scientists and students can see how wind can affect rockets. The Wright brothers used a wind tunnel to test there model planes. The reason it has limitations is there is no wind is space because there is no gravity which means there is no particles that make up weather and wind. Wind tunnels help us know how the rocket will perform on the earth, but not in space.

PLEASE GIVE ME BRAINLIEST, THX, AND 5 STAR IF I AM RIGHT. TELL ME IF I AM RIGHT!!!!

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Answer:

A heliozoa is a phylum of single-celled aquatic animals that are related to the radiolarians

Explanation:

Answer:

heliozoa: microbial eukaryotes (protists) with stiff arms (axopodia) radiating from their spherical bodies, which are responsible for their common name.

Answer:

PAIN:

Nociceptive Pain: Typically the result of tissue injury.

Inflammatory Pain: An abnormal inflammation caused by an inappropriate response by the body's immune system.

Neuropathic Pain: Pain caused by nerve irritation.

Functional Pain: Pain without obvious origin, but can cause pain.

PRESSURE:

Absolute pressure: The clearest reference pressure is the pressure zero, which exists in the air-free space of the universe.

Atmospheric pressure.

Differential pressure.

Overpressure (gauge pressure).

Answer:

It depends on where you are in the world. If you are in California, it would be better to swim in the ocean during August. However, if you are someplace else, it may be better to swim during May.

Explanation:

If you're in California, then August is in the middle of Summer. It is always very hot outside. Therefore, the heat should warm the water up enough for you to be comfortable to swim.

Answer:

Evolutionary ideas do not contradict the thermodynamic laws, these ideas explain how descent with modification enables the organisms to have enhanced metabolic responses to fight against entropy

Explanation:

Organisms fight against entropy to maintain order within their cells and thus continue life. The debate about the association between the Second Law of Thermodynamics and evolutionary ideas emerged in 1900. During this period, it has been proposed that both ideas were contradictory, since evolution decreases entropy, while the second law states that systems increase entropy over time. However, the evolution does not contradict this law, because evolutionary ideas indicate the mode by which the organisms evolve to fight against entropy (for example, by enhancing enzymes responsible for protein degradation), while the Second Law of Thermodynamics literally states that the total amount of entropy of the whole system increases over time.

Answer:

The molecules in a solid are more closely packed than those in a gas. Gas molecules are VERY spread apart, which is why we cannot see them.

Explanation:

Answer:

soil erosion has been a major cause of soil degradation in north carolina for many years .it affects water quality physically,chemically and biological.damage from sediment is expensive,both economically and environmentally.

Explanation:

because the environmental damage from sediment is often cumulative,the ultimate affects and the consequences of off-site sedimentation can be severe,both for people immediately affected and those who must cope with subsequent problems.

The fish would fill with water and die, through osmosis.

Answer: Cicadas will emerge from underground earlier in the year. Based on current patterns, they emerge earlier in the south than in the north because it’s warmer in the south, so the soil warms sooner. If global temperatures increase around the world, cicadas will emerge from the ground in all areas earlier than expected.

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Answer: See explanation

Explanation:

Journal entry simply has to do with the recording of transactions in an accounting book which signifies the debit and credit balances of the company.

For the adjusting entries:

On Dec 31:

Interest expense:

= 16000 × 9% × 11/12

= 1320

Prepaid insurance

= 4400/24 × 9

= 1650

Check the attached file for further explanation.

Answer:

For slow burning

Explanation:

Answer:

Okay if the water cycle is disrupted ...the energy levels in an ecosystem will decrease

Explanation:

This is mainly because water is mainly used in energy recyclability and so that water is converted to energy through the ecosystem and the presence of water makes the energy to be there in adequate and so if the water cycle is disrupted the energy will decrease

Answer:

Modern humans are HomoSapiens

Explanation:

I am a homo-sapien

Answer:

b. mitosis

Explanation:

it is cell division and keeps things the same

Answer:

B

Explanation:

Mitosis is contrast or what of Meiosis. Mitosis is a cell division process in which a parent cell produces two identical daughter cells.

Answer:The same

Explanation: even thought the cube is split in many pieces the density stays the same

Because breaking the thing into pieces divides the mass and volume by the same factor, the density does not change. Additionally, regardless of a substance's size, its density is constant.

An intensive property is density. This implies that the density of the substance will remain constant regardless of the shape, size, or amount of the thing.

Each component of the thing would have the same density even if you divided it into a million pieces.

For instance, despite the cube being divided into numerous parts, its density remains constant.

In a solid, the atoms or molecules are typically arranged in an orderly or occasionally crystalline structure,

Whereas in a liquid, they are free to move around with little restrictions. Because of this, the solid has a higher density.

Therefore, the density of one of the pieces is remained unchanged.

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Answer:

Both studies support the concept that species operate within a narrow optimum temperature range and are coupled to enzymatic activity.

Explanation:

The studies shown in the question above started from the same concept to establish the scientific experiment and had the same objective related to the investigation as temperature changes in the environment where these organisms live influences the enzymatic activity and, therefore, the functioning of their organism, being able to including modifying the environment around them. In summary, we can say that the studies sought to support the concept that species operate within a narrow range of optimal temperature and are coupled with enzymatic activity.

Answer: There is no passage to read but some ways people can prepare for a tornado are by going to a basement or inside room with no windows and covering their body with something sturdy like a desk if not available you can also use blankets

Explanation:

Answer:

A. Protons

Explanation:

They must have the same number of protons. But they can have a different amount of neutrons.

Answer:

I believe this is true. True

Answer:

because it is moving Na+ against its concentration gradient

Answer:

53.5 cm is equal to 5.35 decimeters

Explanation:

Ten centimeters equal one decimeter.

Answer:

converted into

Explanation:

The higher the organism is on the trophic pyramid, the lower the amount of available energy. For example, plants and other autotrophs (primary producers) convert only a fraction of the enormous amount of solar energy they have access to into food energy.

Answer:

1.living things

2.cell

3.cell

4.function

5.pre existing cell

Explanation:

In living organisms, lipids function mainly as sources of stored energy and components of cellular membranes, which are present in Option D, as lipids are a diverse group of molecules that perform various functions.

Lipids can be broken down through a process called hydrolysis to release energy that can be used for cellular processes, and this energy storage is particularly important for organisms that need to survive for extended periods without a steady supply of nutrients, lipids also play a crucial role in forming the cellular membrane that surrounds and protects cells, such as the phospholipid bilayer, which is a key component of cellular membranes and is made up of two layers of phospholipid molecules.

Hence, in living organisms, lipids function mainly as sources of stored energy and components of cellular membranes, which are present in Option D.

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Answer:

Simplified diagram of pyruvate oxidation. Pyruvate—three carbons—is converted to acetyl CoA, a two-carbon molecule attached to coenzyme A. A molecule of coenzyme A is a necessary reactant for this reaction, which releases a molecule of carbon dioxide and reduces a NAD+ to NADH.

Simplified diagram of pyruvate oxidation. Pyruvate—three carbons—is converted to acetyl CoA, a two-carbon molecule attached to coenzyme A. A molecule of coenzyme A is a necessary reactant for this reaction, which releases a molecule of carbon dioxide and reduces a NAD+ to NADH.

In eukaryotes, this step takes place in the matrix, the innermost compartment of mitochondria. In prokaryotes, it happens in the cytoplasm. Overall, pyruvate oxidation converts pyruvate—a three-carbon molecule—into acetyl two-carbon molecule attached to Coenzyme A—producing an t, N, A, D, H, end text and releasing one carbon dioxide molecule in the process. Acetyl  C, o, A, end text acts as fuel for the citric acid cycle in the next stage of cellular respiration.

Pyruvate oxidation steps

Pyruvate is produced by glycolysis in the cytoplasm, but pyruvate oxidation takes place in the mitochondrial matrix (in eukaryotes). So, before the chemical reactions can begin, pyruvate must enter the mitochondrion, crossing its inner membrane and arriving at the matrix.

In the matrix, pyruvate is modified in a series of steps:

More detailed diagram of the mechanism of pyruvate oxidation.

1. A carboxyl group is removed from pyruvate and released as carbon dioxide.

2. The two-carbon molecule from the first step is oxidized, and NAD+ accepts the electrons to form NADH.

3. The oxidized two-carbon molecule, an acetyl group, is attached to Coenzyme A to form acetyl CoA.

More detailed diagram of the mechanism of pyruvate oxidation.

A carboxyl group is removed from pyruvate and released as carbon dioxide.

The two-carbon molecule from the first step is oxidized, and NAD+ accepts the electrons to form NADH.

The oxidized two-carbon molecule, an acetyl group, is attached to Coenzyme A to form acetyl CoA.

Image credit: "Oxidation of pyruvate and the citric acid cycle: Figure 1" by OpenStax College, Biology, CC BY 3.0

Step 1. A carboxyl group is snipped off of pyruvate and released as a molecule of carbon dioxide, leaving behind a two-carbon molecule.

Step 2. The two-carbon molecule from step 1 is oxidized, and the electrons lost in the oxidation are picked up 2 \text{NADH}NADHstart text, N, A, D, H, end text are generated from \text{NAD}^+NAD

Step 3. The oxidized two-carbon molecule—an acetyl group, highlighted in green—is attached to Coenzyme A (\text{CoA}CoAstart text, C, o, A, end text), an organic molecule derived from vitamin B5, to form acetyl \text{CoA}CoAstart text, C, o, A, end text. Acetyl \text{CoA}CoAstart text, C, o, A, end text is sometimes called a carrier molecule, and its job here is to carry the acetyl group to the citric acid cycle.

The steps above are carried out by a large enzyme complex called the pyruvate dehydrogenase complex, which consists of three interconnected enzymes and includes over 60 subunits. At a couple of stages, the reaction intermediates actually form covalent bonds to the enzyme complex—or, more specifically, to its cofactors. The pyruvate dehydrogenase complex is an important target for regulation, as it controls the amount of acetyl \text{CoA}CoAstart text, C, o, A, end text fed into the citric acid cycle^{1,2,3}

1,2,3

start superscript, 1, comma, 2, comma, 3, end superscript.

If we consider the two pyruvates that enter from glycolysis (for each glucose molecule), we can summarize pyruvate oxidation as follows:

Two molecules of pyruvate are converted into two molecules of acetyl \text{CoA}CoAstart text, C, o, A, end text.

Two carbons are released as carbon dioxide—out of the six originally present in glucose.

2 \text{NADH}NADHstart text, N, A, D, H, end text are generated from \text{NAD}^+NAD

+

start text, N, A, D, end text, start superscript, plus, end superscript.

Why make acetyl \text{CoA}CoAstart text, C, o, A, end text? Acetyl \text{CoA}CoAstart text, C, o, A, end text serves as fuel for the citric acid cycle in the next stage of cellular respiration. The addition of \text{CoA}CoAstart text, C, o, A, end text helps activate the acetyl group, preparing it to undergo the necessary reactions to enter the citric acid cycle.

Explanation:

Answer:

yes because fajamarutation procedure

Explanation: