Sarah experiences abdominal pain, nausea and vomiting. Her doctor tells her that she has hepatitis B, an infectious disease that affects the liver. Hepatitis B, caused by the hepatitis B virus. After a couple of weeks, Sarah's illness goes away. Explain how Sarah's third line of defense successfully fought the hepatitis B virus. Words to include: white blood cells; antigen; pathogen; hepatitis B virus; antibodies

Answer:

choroid plexuses

Explanation:

Cerebrospinal fluid is formed by capillary knots called choroid plexuses, which hang into the ventricles of the brain.

Answer:

The answer would be B. Protein Channels!

Cultural control (crop rotation, usage of regionally adapted or pest-resistant/tolerant cultivars, etc.) is one IPM pest control strategy.

Controlling and preventing pests like insects, rats, and other animals from harming crops, structures, and other regions is the process of pest control. Pest control techniques come in a variety of forms, including chemical techniques like pesticides and physical techniques like barriers and traps. Pest controllers carry out inspections to hunt for pests and indications of harm from pests. After then, use successful remedies to resolve the issue and stop it from happening again. The pest management strategy you select will determine whether repeated treatments are necessary. Pest management offers a defense against insects that could endanger public health and result in expensive property damage. When we hear the words "pest control" or "pest control," we frequently picture getting rid of fleas, spiders, or cockroaches.

Learn more about Pest control here:

https://brainly.com/question/30285171

#SPJ4

Nucleotides contain sugar, a phosphate group, and a nitrogen base and guanine is a nitrogen base​, hence option B is correct.

A phosphate group, a 5-carbon sugar, and a nitrogenous base make up a nucleotide. Adenine, cytosine, guanine, and thymine are the four nitrogenous bases found in DNA. Instead of thymine, uracil is found in RNA.

A nitrogen base and pentose sugar make up a nucleoside. Ribose and deoxyribose are pentose sugars. Purines and pyrimidines are nitrogen bases.

Therefore, guanine is a nitrogen base.

Learn more about nucleotides, here:

https://brainly.com/question/10874360

#SPJ1

Negative feedback by the endocrine system refers to a mechanism by which the body regulates the levels of hormones in order to maintain homeostasis.

One example of negative feedback by the endocrine system is the regulation of glucose levels in the blood by insulin and glucagon.

When blood glucose levels rise, the pancreas secretes insulin, which promotes the uptake of glucose by cells, thereby reducing blood glucose levels. As glucose levels decrease, the pancreas secretes less insulin, allowing glucose levels to return to normal.

This is an example of negative feedback because the body is actively working to return the glucose levels to normal, and the output (insulin) decreases as the input (glucose) decreases.

To learn more about the endocrine system

https://brainly.com/question/3534540

#SPJ4

Oxygen crosses the plasma membrane if the concentration of oxygen is lower inside the cell than it is outside the cell and diffusion is movement of a substance from a higher concentration to a lower concentration. The oxygen would move into the cell.

To learn more about diffusion refer

https://brainly.com/question/2146264

#SPJ1

The advantage of storing energy as starch rather than fats and oils is that it is easily stored by cells and accessible. Starch is a fast-breaking molecule that allows you to get at the glucose you require for energy release.

Starch seems to be a polysaccharide and complex carbohydrate composed of a chain of covalently linked glucose molecules. Pure starch is a tasteless, odorless, white powder produced from plants that accounts for a major component of modern human meals. Most green plants produce starch to store extra glucose produced during photosynthesis.

Glycogen is a more highly branched polymer containing glucose monomers that functions as an energy storage molecule in mammals. Glycogen is predominantly produced and stored in liver and muscle cells. When they need to absorb more energy than they have readily accessible from photosynthesis, they trap glucose as part of a carbohydrate molecule or break off smaller glucose units.

To know more about the Starch, here

https://brainly.com/question/14278135

#SPJ4

Experiment is the name given to a set of controlled observations that test a proposed explanation.

To ascertain if changes in one variable might result in changes in another, investigators conduct experiments. We can make better choices about our concepts and tasks by experimenting. People frequently make the error of taking an idea and running with it without first evaluating the underlying premises. Although we frequently don't realize, we only presume when we believe we do.

In a controlled setting, like a lab, controlled observation is a research technique that involves watching individuals. In a controlled observation, the researcher decides the place, the schedule, the volunteers, and the equipment to be used to carry out the research. The researcher also predicts and regulates the study variables.

To learn more about experiments here

brainly.com/question/30055326

#SPJ4

A hypotonic solution is one that has a lower concentration of solutes than the cell itself. When a plant cell is immersed in a hypotonic solution, it absorbs water by osmosis.

This causes the cell to swell and can lead to cell lysis, which is when the cell membrane ruptures due to the increased pressure from the water influx. Once the cell membrane ruptures, the cell's contents are released into the environment, leading to the death of the cell. The reason for this is that the cell does not have a built-in structure to counter the pressure of the incoming water.

As a result, the cell membrane is unable to withstand the pressure and ruptures. To maintain its internal environment, a plant cell must be placed in an isotonic solution, which has the same solute concentration as the cell itself. This will allow the cell to remain in a state of equilibrium, avoiding the risk of cell lysis.

Learn more about cell membrane visit:

https://brainly.com/question/19360972

#SPJ4

Answer:

A.L. Washburn's study found that when the balloon in his stomach was inflated, the stomach contractions were transmitted to a recording device. This allowed him to measure and compare the activity of the stomach muscles at different times. Washburn's research helped to further our understanding of how the muscles of the stomach contract and how they contribute to digestion.

give me brainiest

Osteoblasts, osteocytes, and osteoclasts are the names of bone cells.

Osteoblasts, osteocytes, osteoclasts, and bone lining cells are the four different types of cells that make up bone. On bone, surfaces can be found osteoblasts, bone lining cells, and osteoclasts, all of which are produced from local mesenchymal cells known as progenitor cells.

Osteocytes are the cells responsible for producing the components that are necessary for the bone matrix to remain healthy. Osteoclasts are multinucleated bone cells that originate from the stem cells that are found in the red bone marrow. These cells can be found in bones. These cells are accountable for the process of resorption, which refers to the breaking down of bone.

You can also learn about Osteocytes from the following question:

https://brainly.com/question/13749266

#SPJ4

Answer:

Explanation:

i do not know i am not smart

All somatic (body) cells have 46 chromosomes (40 in the mouse), of which half originated from the mother and half from the father. Gametes (sperm and egg) are not referred to be somatic (body) cells.

The cell has two 46-chromosome groups when mitosis is finished, each encased in its own nuclear membrane. The cell then undergoes a process known as cytokinesis to divide into two identical copies, each of which has 46 monovalent chromosomes.

However, the cell divides into two during cytokinesis, leaving each daughter cell with 46 chromosomes or 23 pairs of chromosomes. The amount of chromosomes in the sex cell will be half that of the somatic cell since meiosis is a reductional division.

To know more about 46 chromosomes

https://brainly.com/question/29806722

#SPJ4

Trace fossils can provide us information about indirect evidence of life in the past.

Fossilized animal tracks can tell us different things about the animals that made them. By looking at the shapes of tracks, scientists can figure out what kind of feet made the tracks. Researchers can tell how an animal stood and moved by looking at its trackways, which are groups of at least three consecutive tracks. Researchers can also learn about how ancient animals interacted with each other by looking at how they left tracks.

Researchers take pictures, measure, and make notes about fossil tracks they find. So that information doesn't get lost, it is important to write down as much as possible about a fossil while it is still in the ground. Scientists write down the shapes and directions of the tracks, where they are in relation to each other, how old the rocks are and what kind they are, and where the site is. They also take photos with a size reference (like a centimeter scale) and often trace the positions of a series of tracks on see-through material like acetate.

To learn more about trace fossils, click here:

https://brainly.com/question/2676231

#SPJ4

The minimum number of tRNAs required to translate all the amino acids in the codon table of the genetic code is 61.

This is because there are 61 codons that code for the 20 amino acids, and some of these codons are translated by the same tRNA due to wobble base pairing. Wobble base pairing allows for a single tRNA to recognize multiple codons, which reduces the number of tRNAs needed to translate the genetic code.

This phenomenon is also known as degeneracy, which is defined as the ability of multiple codons to code for the same amino acid. The degeneracy of the genetic code is due to the fact that many amino acids are encoded by more than one codon, and this is possible due to wobble base pairing.

Learn more about  genetic code

https://brainly.com/question/22632342

#SPJ4

In plants and animals, respectively, two types of starch are present: amylopectin and glycogen.

They both include glucose monomers and are polysaccharides. The branched chains of amylopectin and glycogen are. Unlike amylopectin, glycogen has many more branches.

The primary distinction between glycogen and amylopectin is that the latter is a soluble form while the former is an insoluble form. The two forms of starch that make up the majority of a plant's storage polysaccharides, including amylopectin, are starch. Animals' primary polysaccharide form of storage is called glycogen.

As opposed to amylopectin, which is a lengthy, branching chain with some coils, amylose is an unbranched, coil-free chain. Cellulose: In order to create H-bonds with neighboring chains, cellulose is a long, straight, unbranched chain. Glycogen is made up of short, numerously branched chains, some of which have specific chains.

For more information on glycogen and amylopectin kindly visit to

https://brainly.com/question/24307573

#SPJ4

A cell with two sets of chromosomes is called a diploid cell (2n). These cells are typically found throughout the body tissues and are called as somatic cells.

A somatic cell is also called as vegetal cell. It is any biological cell which is involved in forming the body of a multicellular organism other than that of a gamete, or germ cell, gametocyte (n). Such cells compose the body of an organism and divide through the process of binary fission and mitotic division.

Somatic cells are the cells which form the whole body of an organism except the reproductive cells. These cells divide through mitosis. This type of cell division is known equational division. Through this division, many asexually-reproducing organisms produce offspring.

Learn more about Somatic cells here:

https://brainly.com/question/29727711

#SPJ1

Answer:

Your brain gets a boost of these chemicals when you're sexually or romantically attracted to someone. This surge in hormones appears to make your pupils dilate.

Answer: The corpus callosum

Explanation:

The two hemispheres are connected by a thick band of nerve fibers called the corpus callosum. The brain halves are able to communicate with each other via this 'bridge'.

Creaking or cracking sounds in the knee can be caused by a variety of factors, and there are several things that can be done to help reduce or eliminate these sounds.

Exercise: Performing regular exercise can assist the muscles and tendons that support the knee joint to become stronger and more flexible. Maintaining a healthy weight might assist relieve pressure on the knee joints and lessen the probability of squeaking.

Stretching can assist increase flexibility and lessen cracking by being done both before and after exercise. Decent posture: Keeping a good posture will lessen the strain on your knees and lessen the probability that they'll creak.

Use appropriate form when exercising to lessen the strain on your knees and the risk that they may creak. Avoid activities with high impact: Running and jumping can impose an excessive amount of stress on the knee joints and raise the risk of cracking.

To learn more about knees

https://brainly.com/question/28019830

#SPJ4

Adenosine triphosphate or ATP is a substance that cells use as a manageable source of energy. Given that it serves as the common energy source for all living cells, the energy-carrying molecule (ATP) is referred to as "the currency of life."

Each and every one of the cells that make up a living thing needs ATP to function. The energy from the food we eat is then used to create ATP. It serves as a fundamental building block for all living things. Without ATP, cells wouldn't have the energy or capacity to carry out the tasks required for survival, and they would inevitably perish. ATP is essential for all life forms to perform the tasks necessary for survival. ATP stands for a fully charged battery, whereas ADP stands for "low-power mode," much like a rechargeable battery with a variable level of charge. There are two types of cellular respiration that mitochondria can use to turn glucose into ATP: aerobic and anaerobic that further includes the process of glycolysis, Krebs-cycle, and Electron transport chain

To learn more about Krebs-cycle from the link: https://brainly.com/question/14711153

#SPJ4

The most appropriate unit of time for the number of bacteria to be 600 is 20 minutes.

The population of bacteria in a petri dish triples every 10 minutes. This means that the population will double every 5 minutes.

If the initial population of bacteria is 400 organisms, it will take 20 minutes for the population to reach 600 organisms.

To calculate this, we can use the equation:

Time (minutes) = Log3 (600/400) x 10

Time (minutes) = Log3 (1.5) x 10

Time (minutes) = 0.47712125 x 10

Time (minutes) = 4.7712125

Time (minutes) = 20 minutes

To learn more about bacteria, click here:

https://brainly.com/question/8008968

#SPJ4

Answer:

The phenotype of two dominant genes is the physical traits that are expressed when these two particular genes are present. Which can be anything from hair colour to eye colour, height and more. The combination of these two dominant genes will determine what the final appearance looks like for an individual organism.

Explanation:

hope this helped.

The one thing this technology will never solve is the use of humans as models in genetic experiments.

Genetic testing creates tension within a family because the results can reveal information about other family members in addition to the person who is tested. The possibility of genetic discrimination in employment or insurance is also a concern.

Except in the case of highly controlled and regulated clinical trials, geneticists and scientists do not use humans for their experimental investigations because of the obvious risk to life. Instead, they use various animal, fungal, bacterial, and plant species as model organisms for their studies.

Understanding genetic factors and genetic disorders is important in learning more about promoting health and preventing disease. Some genetic changes have been associated with an increased risk of having a child.

Learn more about genetic testing:

https://brainly.com/question/30999

#SPJ1

The two main types of cells that make up bone tissue are osteoblasts and osteoclasts.

Osteoblasts are the cells responsible for creating and maintaining bone tissue. They secrete substances which form the matrix of the bone, including collagen, minerals, and other proteins. Additionally, osteoblasts also regulate the formation of new blood vessels to provide vital nutrients to the bone tissue.

Osteoclasts are the cells responsible for breaking down old bone. They secrete enzymes that dissolve the mineralized material of the bone matrix, allowing the body to reabsorb and use the calcium and other minerals found in the bone. This process is essential for keeping the bones healthy and strong.

Together, these two types of cells work together to keep bones healthy and strong.

Learn more about Osteoblasts:

https://brainly.com/question/24905581

#SPJ4

DNA molecules serve as both a genetic information storage and transmission medium.

Only two closely related nucleic acids, DNA and RNA, serve as carriers and stores of genetic information in nature. They represent biological information at the molecular level.

The DNA's linear nucleotide sequence contains genetic information. The base pairs G-C and A-T form a hydrogen bond that holds the two complementary strands of nucleotides that make up each DNA molecule's double helix together.

Adenine (A), guanine (G), cytosine (C), and thymine (C) are the four chemical bases that make up the code that stores the information in DNA (T). The 3 billion bases that make up human DNA are identical in more than 99 percent of people.

To learn more about DNA molecules

https://brainly.com/question/19302583

#SPJ4

Dispersal, which happens when a few individuals of a species travel to a different region, or vicariance, which happens when a natural occurrence, such the development of a river or valley, physically divides organisms, are the two ways that allopatric speciation events might take place.

When two groups of organisms are divided by a physical or geographical barrier, allopatric speciation takes place. Mountains, oceans, and even sizable rivers are typical examples of these obstacles.

The geographic barrier that divides the Atlantic and Pacific oceans is the isthmus of Panama. An isolated island is where allotropic speciation is most likely to happen. Because of the island's proximity to the mainland, there is less chance of the emergence of new species.

Learn more about allopatric Visit: brainly.com/question/12387377

#SPJ4