Absolute refractory period B. Repolarization C. Action potential D. Depolarization E. Relative refractory period _____ 18. The neuron cannot respond to a second stimulus, no matter how strong. _____ 19. The interior of the cell becomes less negative due to an influx of sodium ions. _____ 20. The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability. _____ 21. Also called a nerve impulse transmitted by axons. _____ 22. An exceptionally strong stimulus can trigger a response.

its A, i took the test sorry for not anasewring at the right time of year, pardon me

Answer:

I think it is A

Explanation:

A would be my andwer

Answer:

When the stomach digests food, the carbohydrate (sugars and starches) in the food breaks down into another type of sugar, called glucose. The stomach and small intestines absorb the glucose and then release it into the bloodstream.

During S phase, every chromosome replicates to yield two identical sister chromosomes (called chromatids ) that remain attached at their kinetochores.

Answer:  True

Explanation:

The drill would pass through the Epidermis, dermis, and hypodermis, Periosteum, bone, endosteum, bone, periosteum, Dura mater, Arachnoid mater, Subdural sinus (venous blood), Pia mater, Subarachnoid space, Cerebrum, and Cerebrospinal fluid.

When a drill is inserted from the right aspect of the head until it reaches the right lateral ventricle, the first structures it would pass through are the epidermis, dermis, and hypodermis, followed by the periosteum, bone, endosteum, and bone. The drill would then pass through the periosteum, dura mater, arachnoid mater, subdural sinus (venous blood), pia mater, and subarachnoid space. Finally, it would reach the cerebrum and cerebrospinal fluid.

In brief, the drill would pass through the layers of skin, then through the periosteum and bone until it reaches the dura mater. The drill would then move on to the subdural sinus, arachnoid mater, subarachnoid space, and the pia mater. Finally, it would reach the cerebrum and cerebrospinal fluid.

Learn more about hypodermis here:

https://brainly.com/question/12993288

#SPJ11

Yes, studying of genetics of dead organisms has offered a great benefit to modern-day humans. This information has greatly uplifted out understanding about the previous beings.

All living things have a fundamental component called DNA, which is made up of information essential for the development of the body and the maintenance of its biological functions.

Thanks to recent technical advancements, scientists can now directly extract DNA from the remains of long-dead people and other organisms.

With the ability to read ancient DNA, we may examine the genetic alterations that shaped modern animals, acquire new information about ancient life, and gain fresh perspectives on intriguing evolutionary puzzles.

Examining systems that influence how genes function, known as epigenetics, can offer additional significant information.

For instance, using epigenetics, we discovered intriguing alterations in the modern human voice box’s (officially known as the larynx) structure that may have enabled us to create complex linguistic structures and produce rich tones.

To know more about genetics, visit:

https://brainly.com/question/8868332

#SPJ9

Answer:

Building seawalls

Explanation:

one solution that cities employ to decrease flooding from tides and Storm is constructing seawalls.

In cell cycle Interphase, M phase and Cytokinesis have different arrangements of chromosomes,nuclear membranes,chromatin etc.Cell cycle involves three phases.

The various periods of a cell cycle include:

Interphase - This stage incorporates the G1 stage, S stage and the G2 stage.

M stage - This is the mitotic stage and is separated into prophase, metaphase, anaphase and telophase.

Cytokinesis - In this stage the cytoplasm of the cell separates.

Interphase is the main phase of cell cycle. The cell stays in the interphase for most extreme periods by covering itself under various nuclear membranes. During this stage the cell sets itself up for division. The cell division goes through cell development and replication of chromatin  during this stage.

To know more about cell cycle, visit here:

https://brainly.com/question/15876101

#SPJ4

The type of bond that is susceptible to lysozyme is the glycosidic bond. Lysozyme is an enzyme that plays a crucial role in the innate immune system, particularly in the defense against bacterial infections.

It acts by breaking down the peptidoglycan layer of bacterial cell walls, leading to the lysis or destruction of the bacterial cells. The peptidoglycan layer is a structural component of bacterial cell walls and consists of repeating units of sugar molecules linked together by glycosidic bonds.

Lysozyme specifically targets the glycosidic bonds between the sugar molecules in the peptidoglycan layer. It hydrolyzes these bonds, resulting in the cleavage of the sugar chains and the weakening of the bacterial cell wall. This enzymatic activity of lysozyme contributes to the bactericidal effect of the immune system and helps in preventing bacterial infections.

Overall, the susceptibility of the glycosidic bond to lysozyme is an important mechanism by which the enzyme can target and disrupt the structural integrity of bacterial cell walls.

Learn more about Lysozyme here

https://brainly.com/question/30898692

#SPJ11

Scientists use recombinant DNA biotechnology to alter a cell's protein production by inserting a gene from another organism into the cell's genome. Hence, option B is correct.

Recombinant DNA technology entails changing genetic material outside of an organism to produce living things or products with improved and desired traits. With the help of the right vector, this approach includes inserting DNA fragments from various sources with desired gene sequences.

Recombinant DNA is used in the production of various antibiotics, vaccines, transgenic plants, and transgenic animals.

With the help of the right vector, this approach includes inserting DNA fragments from various sources with desired gene sequences. Thus, option B is correct.

Learn more about recombinant DNA, here:

https://brainly.com/question/18537492

#SPJ1

Answer:

What's the surface area of 1x1x8?

Explanation:

34 feet squared! Hope that helps.♡

Answer:

34 feet squared

Explanation:

The approximate percentage of base T is also 32%. In DNA, the amount of guanine (G) is equal to cytosine (C), and the amount of adenine (A) is equal to thymine (T).

Polymer composed of two polynucleotide chains that coil around each other to form a double helix is known as DNA.

As the percentage of C is given as 18%, we know that the amount of G is also 18%, since they always pair up.

That leaves us with 64% of the DNA to be accounted for. Since A pairs up with T, we can assume that the percentage of A is also 32%. Therefore, the approximate percentage of base T is also 32%.

So the approximate percentage of each base is:

Adenine (A) = 32%

Thymine (T) = 32%

Cytosine (C) = 18%

Guanine (G) = 18%

To know more about DNA, refer

https://brainly.com/question/16099437

#SPJ1

The correct statement concerning the alternative complement system is that it is activated by pathogen surfaces and it doesn't require antibodies.

The complement system is a portion of the immune system that aids in the recognition and destruction of pathogens, such as bacteria and viruses. The alternative complement system is one of the three pathways that activate the complement system. The alternative complement system is activated by pathogen surfaces and it doesn't require antibodies. Rather than that, it employs a series of spontaneous reactions to identify and target pathogens.The other two pathways of the complement system are the classical pathway and the lectin pathway. Unlike the alternative complement system, the classical and lectin pathways are activated by antibodies. The alternative complement pathway plays a critical role in the defense of the host against infection and inflammation, as well as in the clearance of apoptotic cells and immune complexes from the bloodstream.

To know more about antibodies, visit:

https://brainly.com/question/27931383

#SPJ11

Answer:

B

Explanation:

The process of blood clotting, also known as coagulation, is essential for stopping bleeding in the body. It involves a complex interaction between blood components, including fibrin, platelets, blood clotting factors, and blood cells. These components work together in a series of three steps to form a blood clot.

The blood clotting process involves vessel constriction, which is the narrowing of the blood vessels to reduce the amount of blood flow to the area. This helps to slow down the bleeding and prevent the loss of too much blood.

Blood clotting factors are released, which make the bleeding area sticky. This leads to the formation of a platelet plug, which is a clump of platelets that helps to seal the wound and further reduce bleeding.

In step three, fibrin threads attach to the platelet plug and begin trapping blood cells, strengthening the plug to stop the bleeding. This forms a mesh-like structure that holds the plug in place until the blood vessel can heal and repair itself.

In summary, blood clotting is a complex process that involves the interaction of various blood components to form a clot that stops bleeding. The three main steps include vessel constriction, platelet plug formation, and fibrin formation, which work together to seal the wound and prevent further blood loss.

Learn more about blood clot here :

brainly.com/question/11875070

#SPJ12

The blood clotting process involves three steps: vessel constriction, the formation of a platelet plug, and the trapping of fibrin threads and blood cells. Together, these steps effectively stop the bleeding.

The blood clotting process, or coagulation, is a complex sequence that your body initiates to prevent excessive bleeding when a blood vessel is injured. The process occurs in three main steps:

https://brainly.com/question/38009642

#SPJ12

A tough outer covering, lack of leaves, and covered buds are all signs of a plant in the process of dormancy. Dormancy, also known as winter dormancy or hibernation, is a process in plants where growth and development is suspended for a period of time.

This occurs in response to environmental conditions such as seasonal changes and temperature fluctuations.During the dormant period, plants stop growing, cease to produce leaves, and may form a protective covering, such as a waxy cuticle, over their buds and growing tips. The plant enters a state of rest to conserve energy and protect itself from harsh environmental conditions. This allows plants to survive in climates with extreme temperatures and/or limited access to water or nutrients.

Dormancy is an important process for plants to survive the winter season. As temperatures drop and days become shorter, plants cannot photosynthesize as much and are therefore unable to produce the energy they need to stay alive. As a result, the plant enters dormancy to conserve energy and protect itself from the cold temperatures.

Once spring arrives, the plant can break out of dormancy and resume its normal growth cycle. This is triggered by warmer temperatures and longer daylight hours, which allow the plant to photosynthesize and produce the energy it needs to grow.

Learn more about Dormancy : https://brainly.com/question/19343489

#SPJ4

The main barrier that limits the diffusion of polar molecules across a plasma membrane is the hydrophobic core of the membrane of the membrane.

Polar molecules can't diffuse via the bilayer. Polar molecules want polar protein channels to diffuse via the membrane. This is "facilitated diffusion". Small nonpolar molecules can effortlessly diffuse throughout the mobileular membrane. However, because of the hydrophobic nature of the lipids that make up mobileular membranes, polar molecules (consisting of water) and ions can't do so. Instead, they diffuse throughout the membrane via delivery proteins. Polar molecules are much less loose to diffuse throughout membranes. In order for a polar molecule to move a membrane, it need to ruin its interactions with water because it enters the hydrophobic indoors of the bilayer.

To learn more about hydrophobic check the link below:

https://brainly.com/question/18522370

#SPJ4

Complete question:

The main barrier that limits the diffusion of polar molecules across a plasma membrane is the ___

a) hydrophobic exterior of the membrane

b) hydrophobic core of the membrane

c) hydrophilic exterior of the membrane

d) increased surface area of the membrane

Answer:

The genetic information within the DNA of a gene is carried on an intermediary molecule, RNA (ribonucleic acid). Information within a cell can therefore be seen as passing from DNA, RNA, to a protein. This flow of information can be expressed in another way. DNA makes RNA makes protein.

Explanation:

Answer:

DNA --> RNA --> protiens.

Explanation:

The true statement regarding rigor mortis in fish is as follows: Rigor mortis can last anywhere from 10 to 15 minutes depending on the species, temperature, and condition of the fish when caught.

Rigor mortis is a temporary stiffness of a body's muscles and joints following death.

Rigor mortis occurs in fish after the fish dies. The symptoms are as follows:

However, the appearance of the fish experiencing rigor mortis is dependent on the species of the fish.

Therefore, the true statement regarding rigor mortis in fish is as follows: Rigor mortis can last anywhere from 10 to 15 minutes depending on the species, temperature, and condition of the fish when caught.

Learn more about rigor mortis at: https://brainly.com/question/13554527

#SPJ1

Answer:

The X-shaped structure is made of strands of DNA.

Explanation:

The chromosomes are thread-like structures located in the nucleus of each cell in the body. In a human cell, there are 23 pairs of chromosomes found in the nucleus. Each chromosome is made up of strands of DNA tightly coiled many times around proteins called histones which gives support to its structure.

The chromosomes are X-shaped and are observed only in a cell undergoing division by mitosis or meiosis. Each of these X-shaped chromosomes consists of two identical sister chromatids. The sister chromatids are connected to each other by a region of the chromosome called the centromere. The centromere are located around the depression point of the chromosome which divides the sister chromatids into two regions: long arm called the q arm and a shorter arm called the p arm. During mitosis, spindle fibers attach to this region, and they eventually pull the sister chromatids apart to form two separate chromosomes, one for each daughter cell.

Answer:

Nucleus. nucleus; animal cell. ...

Ribosomes. Ribosomes are the protein factories of the cell. ...

Endoplasmic reticulum. Ribosomes on the outer surface of the endoplasmic reticulum play an important role in protein synthesis within cells. ...

Golgi apparatus. Golgi apparatus. ...

Chloroplasts. chloroplast structure. ...

Mitochondria.

Explanation:

Humans have specialized cells in the body. Each cell type performs a unique function. Humans have different type of cells with different structures and functions.

All the cells in a human's body contain the same DNA. However, the human body is composed of many different types of cells. Because of gene regulation, each cell type possess a different set of active genes although all the cells of the body contain the same DNA.

Answer - different cell types all have the same genes but have different genes active.

Most of the serotonin neurons in the brain are located within the raphe nuclei. The correct answer is option c.

Most of the serotonin neurons in the brain are located within the raphe nuclei. The raphe nuclei are a group of nuclei located in the brainstem, specifically in the midline of the brainstem, including the pons and medulla. These nuclei contain the cell bodies of serotonin-producing neurons that project to various regions of the brain.

Serotonin is a neurotransmitter that plays a crucial role in regulating mood, sleep, appetite, and many other physiological functions. The raphe nuclei are responsible for the widespread distribution of serotonin throughout the brain, influencing various brain regions and neuronal circuits involved in mood, emotions, and behavior.

Therefore, the correct answer is option c. raphe nuclei.

Learn more about serotonin here:

https://brainly.com/question/29237051

#SPJ11

From the statements of the question,  Lucas used computer and 3-D models.

The term model refers to a representation of reality. A model could serve the purpose of explanation or prediction.

We must note that the virtual reality is a computer package for creating 3D models and the modelling clay creates a tangible form of the 3D simulation hence Lucas used computer and 3-D models.

Learn more about models: https://brainly.com/question/14281845

Carbohydrates, proteins, and lipids are macronutrients that provide the body with energy and are essential for various biological processes.

Carbohydrates, proteins, and lipids are macronutrients that supply energy to the body and are required for a variety of biological functions.

For such more question on carbohydrates:

https://brainly.com/question/336775

#SPJ4

Overall, the differences in the temperature curves for New York and Lincoln can be attributed to a combination of factors, including the  intensity of insolation ,latitude, proximity to water, and prevailing winds. While insolation is an important factor, it is not the only one that determines temperature, and other factors can play a significant role in shaping temperature patterns for a particular location.

What is Temperature?

Temperature is a measure of the average kinetic energy of the particles in a substance or system. In other words, it is a measure of how hot or cold a substance or system is. The SI unit for temperature is the Kelvin (K), although temperature can also be measured in other units such as degrees Celsius (°C) and degrees Fahrenheit (°F).

The intensity of insolation, or the amount of incoming solar radiation, is one of the key factors that affects the temperature of a location. However, there are other factors that can also influence temperature, such as latitude, altitude, proximity to water, and prevailing winds.

New York and Lincoln are located at different latitudes, with New York being further north than Lincoln. This means that New York receives less intense insolation than Lincoln, particularly during the winter months when the sun is lower in the sky. As a result, the temperature in New York tends to be colder than in Lincoln during the winter months.

In addition, New York is located on the coast, which moderates its temperature somewhat by keeping it cooler in the summer and warmer in the winter than locations further inland. Lincoln, on the other hand, is located inland and is not influenced by coastal effects. This means that Lincoln tends to have larger temperature swings than New York, with hotter summers and colder winters.

Learn more about Temperature from given link

https://brainly.com/question/25677592

#SPJ1

The correct answer is: the number of kinds of organisms in an environment.

Species diversity is a measure of the biodiversity of an ecosystem, which is the variety of life forms in a given area. Species diversity can be calculated by counting the number of different species (species richness) and the relative abundance of each species (species evenness) in an environment. A high species diversity means that there are many different kinds of organisms and that they are evenly distributed in the environment. A low species diversity means that there are few different kinds of organisms and that some are more dominant than others in the environment. Species diversity can be affected by factors such as climate, habitat, human activities, and evolutionary history.

The other options are incorrect because:

- The complexity of an ecosystem is a vague term that does not have a clear definition or measurement. It could refer to the structure, function, or interactions of an ecosystem, but it is not synonymous with species diversity.

- The different physical characteristics in a species are related to phenotypic variation, which is the range of observable traits that a species can have. Phenotypic variation can be influenced by genetic variation, which is the diversity of genes in a species' gene pool, or by environmental factors, such as temperature, nutrition, or stress. Phenotypic variation does not reflect species diversity, which is about the differences between species, not within a species.

- The variety of genes in a species' gene pool is related to genetic diversity, which is the amount of genetic variation within a population or a species. Genetic diversity can be measured by looking at the frequency of alleles (different versions of a gene) or genotypes (combinations of alleles) in a population or a species. Genetic diversity can affect the evolutionary potential and adaptability of a population or a species, but it is not the same as species diversity, which is about the differences between populations or species.