Answer:
The action potential has three main stages: depolarization, repolarization, and hyperpolarization. Depolarization is caused when positively charged sodium ions rush into a neuron with the opening of voltage-gated sodium channels.
Explanation:
Describe the effect that pilocarpine had on the heart and why it had this effect. How well did the results compare with your prediction?
Answer:
Pilocarpine can affect the heart since it shares the drug's binding site with the traditional receptors that it seeks to effect under treatments of xerestomia, dry eyes or Sjorgen's syndrome.
Explanation:
The effect is Parasympathomimetic in the exocrine glands, but these glands have the same receptors as the cardiac tissue, so you can see harmful cardiac side effects.
It increases adverse effects with ß-adrenergic antagonists, thus generating heart failure, and even kidney failure indirectly due to the possible risk of chronic heart failure.
Figure 1 represents a plasma membrane and molecules present on either side.
Part A: Describe the biological need for cells to be surrounded by a membrane that is selectively permeable for different materials.
Part B: Explain how the model shows selective permeability of the membrane to specific ions.
Part C: Describe the characteristics of the phospholipid bilayer that permit small hydrophobic lipid molecules to pass directly
Part D: Based on the model, explain whether the molecules shown crossing the membrane require energy to do so.
Answer:
A. Cell membrane is the outer layer of the cell that plays a role as the barrier between the internal and outer environment of the cell by regulating by allowing particles or substances to enter or exit the cell. It helps in maintaining the internal environment of the cell by allowing certain molecules to enter and stop other molecules.
B. Phospholipids bilayer is the part of the plasma membrane that makes it selective permeable. The plasma membrane does not allow ions with charges on the side of the molecules directly sodium, potassium, and many other ions are examples of this. Ions can enter or exit the cell with the help of the transporters or complexes.
C. There is hydrophilic-head and hydrophobic-tail present in the phospholipid bilayer in the structure of the cell membrane which makes it selectively permeable.
D. For active transport of molecules, the movement of molecules is always against the gradient which means movement from lower concentration to a region of higher concentration that requires energy (ATP).
Which of the following explains how water is recycled on Earth? A. Ice gains heat, becomes liquid, and changes back to ice as it loses heat. B. Ice gains heat, becomes a liquid, gains more heat, and forms a gas (water vapor). C. Liquid water gains heat, evaporates into the air as water vapor, gathers into clouds, and then falls back to earth as a liquid as it loses heat. D. All of the above.
Answer:
Its option D. All of the above.
Explanation:
As all the facts and processes causes recycling of water
12. What term describes the average weather conditions in a geographic area?
O A. Weather
O B. Climate
O C. Precipitation
O D. Temperature
Answer:
The answer is B
Explanation:
Climate is the average weather conditions in a geographic area.
Explain that variation among offspring is a potential evolutionary advantage resulting from sexual reproduction.
S exual reproduction (Syngenesis) is that it results in variety in the offspring.
What is syngenesis reproduction?syngeneisis reproduction occurs when the sperm from the male parent fertilizes an egg from the female parent, producing an offspring that is genetically different from both parents.Within a community of organisms or a species, there is generally a lot of genetic variety. Because of their diversity, the species can adapt to different habitats, giving them a survival edge.During fertilization, the nuclei of a male and female gamete cell fuse together, resulting in syngenesis reproduction. Both parents' alleles are passed down to the children.Produces genetic variation in the offspring.The species can adapt to new environments due to variation, which gives them a survival advantage.Syngenesis reproduction has the potential to produce tremendous genetic variation in offspring. This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization.To know more about syngenesis reproduction here
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what do parents transfer to their offspring
Answer:
They pass traits and genetic information
Heredity is the passing on of traits from parents to their offspring
Hope this Helps!! :)
possible problem of carbon oxygen cycle?
Answer:
Humans cause environmental problems by influencing the carbon cycle in two ways. Firstly, the removal of forests has caused depletion in plants and trees that absorb carbon dioxide. Humans cause great carbon emissions to the atmosphere, which take place during industrial processes, such as coal and oil combustion.
Explanation:
I hope this helps.
Bacteria can transfer their drug resistance to other bacteria
Answer:
this is true
Explanation:
this can halpen through dna mutation and that mutation being passed onto other generations while the current generations die offwhen the future generations give birth they pass on the drug resistance
Which process fills lakes of underground water?
O A. Precipitation
O B. Transpiration
O C. Percolation
O D. Condensation
Answer:
A.percolation
Explanation:
just iss
A black male guinea pig mates with a white female guinea pig, and the female gives birth to four offspring. Three of the offspring are black, and one is white. Which of the following best explains how one offspring was born with white fur?
A. The allele for black fur is dominant.
B. The father carried one allele for white fur.
C. The allele for white fur is recessive.
D. The mother carried one allele for black fur.
Answer:
A
Explanation:
The statement that best explains how one offspring was born with white fur is that the allele for black fur is dominant over the allele for white fur.
What do you mean by Offspring?Offspring may be defined as the resulted progeny which is produced after the successful mating between male and female.
In the given scenario, the allele for black fur is dominant (B) over the allele for white fur (w). The Genotypes of male and female are heterozygous, i.e. Bb. When Bb is crossed with Bb, the resulted offspring have the genotypes BB, Bb, Bb, and bb. Out of which, the first three have black fur and the last have white fur.
Therefore, the statement that best explains how one offspring was born with white fur is that the allele for black fur is dominant over the allele for white fur.
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Which statement best describes the effect that an increased amount of atmospheric carbon has on plants?
Plants will require less water to be absorbed.
Plants will decrease their rate of transpiration.
Plants will require more sugar to create energy.
Plants will increase their rate of photosynthesis.
A plate moving at a rate of 3 cm/year is moving toward a plate that is 1,500 km away. In how many years will the plates collide? 50,000,000 years 50,000 years 5,000 years 500 years
The answer is D. 50,000,000
I got it right on Edg2020 quiz
A plate moving at a rate of 3 cm/year is moving toward a plate that is 1,500 km away. In 50,000,000 years the plates will collide. Thus, option D is correct.
What is inelastic collision?An inelastic collision has been defined as the type of collision in which two objects has been involved in the collision stick all together after the collision and than they also travel with the same velocity just after the collision and when the dart has been thrown and sticks in the dartboard, the type of the collision has been known as Inelastic collision.
The law of the conservation of the momentum that says that the momentum just before the collision must be equal the momentum and after the collision.
Therefore, A plate moving at a rate of 3 cm/year is moving toward a plate that is 1,500 km away. In 50,000,000 years the plates will collide. Thus, option D is correct.
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Putting a demand on muscles repeatedly by making them work harder is _________. a) only effective in increasing muscle endurance.
b) effective for increasing muscle tissue when comnined with tripling protein intake.
c) causes overtraining and is an ineffective method for adding more muscle tissue.
d) only effective for increasing muscle strength.
e) the most effective, safe way for athletes to add muscle tissue.
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23. Which statement best describes the molecules in a sample of water that was heated
from a liquid to a gas?
A. The average size of the molecules decreased.
B. The average size of the molecules increased.
C. The average kinetic energy of the molecules decreased.
D. The average kinetic energy of the molecules increased.
She most likely suffers from hyposmia as Jennifer suffers from a decreased sense of smell because of repeated colds and allergies. Thus, option C is correct.
What is Anosmia?"Anosmia" refers to a condition in which a person loses his sense of smell. This could either be a "temporary loss of smell" or "permanent loss of smell." A temporary loss of smell may be caused by a cold while permanent loss of smell may be caused by aging or injury to the nerves.
"Parosmia" refers to a condition in which a person's sense of smell is distorted or changed. This means that a person may think something smells awful when in reality, it smells good.
This could either be a "temporary loss of smell" or "permanent loss of smell." A temporary loss of smell may be caused by a cold while permanent loss of smell may be caused by aging or injury to the nerves.
Therefore, She most likely suffers from hyposmia as Jennifer suffers from a decreased sense of smell because of repeated colds and allergies. Thus, option C is correct.
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difference between dragonflies and birds
Answer:
dragon flies are.insects birds are birds dragonflies are small birds are big
HELP HELP!
The diagram below shows the formation of the disaccharide maltose, which occurs when two molecules of glucose undergo a dehydration reaction.
a. Describe the result if a molecule of fructose became bound to glucose instead.
b. Explain how the properties of the molecule that forms might differ from maltose.
Answer:
A. If a molecule of Fructose bonded with Glucose, it would become Sucrose, or Table Sugar, and release a water molecule.
B. It may have the same chemical make-up, but fructose is a pentagonal ring instead of a hexagonal ring.
I know this is almost a year late, but clicking on this question helped me answer the same question.
A water molecule would be released if a fructose molecule joined forces with a glucose molecule to form sucrose, sometimes known as table sugar. Despite having a similar chemical structure, fructose has a pentagonal ring rather than a hexagonal ring.
What are different properties of sucrose and maltose?When two simple sugars are combined, maltose and sucrose are both produced. The primary distinction between maltose and sucrose is that the former is made up of two molecules of glucose.
While the latter is made up of glucose and fructose. Furthermore, sucrose is a non-reducing sugar, whereas maltose is a reducing sugar.
Most sugars are composed of short chains of smaller sugar molecules that act as the building blocks.
Maltose is produced when two molecules of glucose interact. Table sugar, often known as sucrose, is composed of one glucose and one fructose. Maltose can be created during the breakdown of starch, a lengthy chain of many glucose units.
Therefore, both maltose and sucrose differ in their properties.
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You are observing a cell underneath a microscope and you notice chloroplasts, an
eyespot, and a flagellum. What type of cell are you observing?
Adaptations always start at the .....level?
Answer:
dynamic evolutionary process
Explanation:
A car is traveling at a speed of 35 m/s. In 15 seconds the car decides to increase their speed to 89 m/s. calculate the cars acceleration
Answer:
3.6m/s²
Explanation:
Given parameters:
Initial velocity = 35m/s
Time taken = 15s
Final velocity = 89m/s
Unknown:
Acceleration of the car = ?
Solution:
Acceleration is the rate of change of velocity with time;
Mathematically;
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time
Insert the parameters and solve;
Acceleration = [tex]\frac{89 - 35}{15}[/tex] = 3.6m/s²
The concepts of "stress" and "strain" are related because
O strain causes stress
O stress causes strain
O stress causes a plate boundary to form
O strain causes a plate boundary to form
Answer:
I honestly think it's the second one. You could say it's the first one but that just doesn't make sense. Too much stress is what causes a strain on your body
Examine the words below. Three of them have something in common. Choose the word that doesn't relate to the other three (choose the one that
doesn't belong)
O focus
O fault
O seismograph
O epicenter
Answer:
b: fault doesn't have something in common with the others
Explanation:
2. Which of the following describes the cytoskeleton?
A. a web of proteins that gives shape and support to the cell
B. a membrane-bound organelle that contains genetic material
C. the outer covering of a cell that separates it from the environment
D. the structure that contains the information about how to make a cell's
proteins
Answer:
A
Explanation:
A web of proteins that gives shape and support to the cell.
What does the author explain in the passage?
Answer:
What passage
Explanation:
please provide an example
3. The stage where the nuclear membrane disappears and chromosomes begin to appear is
A) INTERPHASE P PROPHASE C) TELOPHASE D) ANAPHASE E) METAPHASE
_4. During interphase, when the DNA is in long thin strands and is not yet visible, DNA is
CHROMATIN
B) NUCLEOLUS C) CHLOROPLAST D) CHROMOSOMES
5. The cells that result from mitosis are called
A) SEX CELLS B) TWIN CELLS C) PARENTS CELLS D) DAUGHTER CELLS
__6. Using the first letter of each stage, the correct order of the stages of mitosis are
A) MATPB) PTMA C) PMAT D) AMPT E) ALL ARE INCORRECT
7. The stage of mitosis where the nuclear membrane reappears is
A) INTERPHASE B) PROPHASE C) TELOPHASE D) ANAPHASE E) METAPHASE
_8. The stage of mitosis where chromosomes line up along the center is
A) INTERPHASE B) PROPHASE C) TELOPHASE D) ANAPHASE E) METAPHASE
___9. The stage of mitosis where chromatids separate is
A) INTERPHASE B) PROPHASE C) TELOPHASE D) ANAPHASE E) METAPHASE
_10. The phase of cell cycle where the cell grows is
A) INTERPHASE B) PROPHASE C) TELOPHASE D) ANAPHASE E METAPITAS
Answer:
OK OK... read below Hope this helps!
Explanation:
3: Prophase
4: Chromatin
5: Daughter cells
6: PMAT
7: Telophase
8: Metaphase
9: Anaphase
10: Interphase
What is a consumer????????????????
Answer:
a person who purchases goods and services for personal use.
Explanation:
How do genetic factors, environmental factors, and pathogenic agents affect both individual and public health?
Ans:
genetic factors:
Many conditions and diseases are related to genes in some way. Some mutations may be in a single gene, although most disorders are more complex. Many diseases, such as heart disease and diabetes, are caused by issues with multiple genes in combination with lifestyle and environmental factors.
environmental factors:
Many things in the environment can affect our health. Hazardous substances found in the air, soil and water can originate from a variety of sources, such as agricultural and industrial activities, mining operations, landfills and leaky underground storage tanks
pathogenic factors:
Sometimes bacteria multiply so rapidly they crowd out host tissues and disrupt normal function. Sometimes they kill cells and tissues outright. Sometimes they make toxins that can paralyze, destroy cells' metabolic machinery, or precipitate a massive immune reaction that is itself toxic.
i hope this will be more helpful for u...:)
if yes so gve me thnx and brillientiest...:)
Answer:
genetic has to do with how you're more common to getting a disease or illness due to it being in your family/genes.
environmental has to do with diseases like chicken pox and how it was everywhere unlike genetic where you just got it off you who u were
pathogenic agents are like bacteria and sometimes that bacteria can grow too fast which can kill people.
Explanation:
4. Which energy resource, once depleted, is essentially nonrenewable?
O A. Coal
O B. Solar
O C. Biomass
O D. Wind
Help :(
Answer:
The answer would be A. Coal
The energy resource that, once depleted, is essentially nonrenewable is coal, which is present in Option A, as coal is a fossil fuel that takes millions of years to form from the remains of plants and animals.
what is coal?Coal is a fossil fuel that is formed from the remains of plants and animals that lived millions of years ago, and these organic materials were buried under layers of sediment and rock, and over time, heat and pressure caused the organic material to transform into coal. This is a finite resource because the process of forming coal takes millions of years, so the rate at which coal is consumed far exceeds the rate at which it is formed, which means that once coal is depleted, it cannot be replenished within a human timescale.
Hence, the energy resource that, once depleted, is essentially nonrenewable is coal, which is present in Option A.
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12. For an XX female to express a recessive sex-linked trait, she must have
A. Y chromosome
B. an inactive allele
C. two recessive alleles
D. two dominant alleles
if pathogens are present a tree is likely to have
a. a disease
b. a healthy future
c. an insect infestation
d. overexposure to pesticides
Answer:
a. a disease
Explanation:
Pathogens are disease-causing organisms. For example, some bacteria and viruses are pathogens for different species.
Therefore, a tree with pathogens present is likely to have a disease. Different pathogens affect different trees. Examples include Anthracnose , which is caused by a fungus
Answer:
A disease
Explanation:
I did the test
