What is the name for the measure of a drug's relative safety for use, computed by the ratio of the lethal dose for 50 percent of the population over the effective dose?

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Answer 1
It is called THERAPEUTIC INDEX. Therapeutic index is the comparison of the amount of a particular drug that causes the desired therapeutic effects and the amount that causes toxicity. The index can be low or high. A drug with a low therapeutic index will require only a small increase in dose to produce toxic effects in users. 

Related Questions

The three systems that work together most closely to regulate blood pressure, osmolarity and ph are the _________ systems.
a.cardiovascular,integumentaryandurinary
b.respiratory, lymphatic and cardiovascular
c.urinary,respiratoryandcardiovascular
d.cardiovascular, digestive and urinary
e.urinary,lymphaticanddigestive

Answers

The answer is c.

Urinary, respiratory and cardiovascular.

Which example describes migration caused by overcrowding?

Answers

Migration caused by overcrowding is exemplified by 'B. Hordes of rats flee a city when their numbers exceed the carrying capacity', as it reflects the population density reaching a point where resources are insufficient, necessitating migration to find more suitable environments.

The example that describes migration caused by overcrowding is: B. Hordes of rats flee a city when their numbers exceed the carrying capacity. This represents a situation where the population density of the rats becomes too high, leading to insufficient resources to support them, prompting a migratory response to seek out new areas with more available resources.

Migration is a natural behavior seen in many species and can be driven by various factors, including the search for food, mating opportunities, and more suitable climatic conditions. Animals may exhibit different types of migration, such as obligate migration, where species always migrate, facultative migration, where they only migrate under certain circumstances, and incomplete migration, where only part of a population migrates while the rest remain.

The distance, measured in degrees, north and south of the equator is referred to as _____.
the prime meridian
the arctic circle
longitude
latitude

Answers

Answer;

-Latitude

Explanation;

-The distance, measured in degrees, north and south of the equator is referred to as latitude.

-Latitude is the measurement of distance north or south of the Equator. It is measured with 180 imaginary lines that form circles around the Earth east-west, parallel to the Equator. These lines are known as parallels. A circle of latitude is an imaginary ring linking all points sharing a parallel.

-The Equator is the line of 0 degrees latitude. Each parallel measures one degree north or south of the Equator, with 90 degrees north of the Equator and 90 degrees south of the Equator.

Latitude is an angular measurement that indicates the position of a location on the Earth's surface relative to the equator. The distance, measured in degrees, north and south of the equator is referred to as latitude.

The equator is defined as 0 degrees latitude and is the reference point for measuring latitude. As one moves north of the equator, the latitude increases in positive values, while moving south of the equator results in negative values.

Latitude lines, also called parallels, are imaginary horizontal lines that circle the Earth parallel to the equator. They are evenly spaced and become progressively smaller as they move away from the equator towards the poles. The maximum latitude is 90 degrees at the North Pole and -90 degrees at the South Pole.

Latitude is a geographic coordinate that determines a location's position in relation to the equator. It is measured in degrees, with 0 degrees representing the equator, positive values representing the northern hemisphere, and negative values representing the southern hemisphere.

Latitude lines run parallel to the equator and are used to establish horizontal positions on the Earth's surface.

Therefore, the distance, measured in degrees, north and south of the equator is referred to as latitude.

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The roman numeral v indicates the ________ nerve.

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Trigeminal nerve. Responsible for sensation in the face and motor functions such as biting and chewing.
Good luck and have a nice day.

What characteristics do land plants share with green algae?

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They both utilize their ability of photosynthesis.

What had to be invented before we could discover Saturn and Neptune

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Telescopes had to be invented
To discover Neptune we needed to invent the telescope. Neptune and a few other planets are too dim for us to see without a telescope.
Saturn is a brighter planet that we can see with the naked eye, you don’t need a telescope to see it.

what is an example of a job a biologist would have ?

Answers

maybe a Microbiologist or research scientist

If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have

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increased in pitch (frequency). It's the doppler effect.

Answer choices are:

a. a period higher than the original period.

b. a pitch lower than the original pitch.

c. an amplitude lower than the original amplitude.

d. a frequency higher than the original frequency.

____________________________________________________________

Correct answer choice is:

D. A frequency higher than the original frequency.

____________________________________________________________

Explanation:

This is a true case of Doppler's effect. The Doppler effect can be defined as the effect originated by a traveling source of waves in which there is a visible higher variation in pulse for observers towards what the source is progressing and a visible descending shift in rate for observers from what the source is dropping.


A cluster of symptoms that regularly occur together is known as a:

Answers

The answer you are looking for is :syndrome

Why is the fact that all cells throughout the body have complete sets of dna, a useful fact for forensic scientists?

Answers

DNA stands for deoxyribonucleic acid. The deoxy- in the DNA is a short term for deoxyribose. The nucleic acid molecule has three parts; sugar, phosphate and a base. The phosphate in the DNA acts as a backbone of the molecule. It is also responsible for the DNA’s ‘double-helix’ structure. The base has four codes namely adenine, thymine, cytosine and guanine. Adenine and thymine are base pairs whereas cytosine and guanine are base pairs. DNA is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms whereas the RNA is a single-stranded chain of alternating phosphate and ribose units with the bases adenine, guanine, cytosine, and uracil bonded to the ribose. 

Describe the impact of a waterborne pollutant on an aquatic community. write a 100-word report on how that pollutant affected aquatic life, what the effect was, and whether the effect is linked to biomagnification.

Answers

A waterborne pollutant can have different effects on aquatic life depending on the nature of the pollutant. A pollutant at lower levels can have minimal or no effect on aquatic life. However, when the concentrations of the pollutant are high, the population of aquatic organisms can be greatly reduced. There are also times when pollutants at lower concentrations cause significant damage. An organism can consume another organism that has absorbed small amounts of the pollutant. As the consumer takes in more of the contaminated organism, the pollutant is magnified in the body of the consumer resulting in lethal concentrations. This is called biomagnification.
Final answer:

Water pollution can have a significant impact on aquatic communities, affecting aquatic life and the overall ecosystem. Pollutants such as heavy metals can biomagnify in the food chain, leading to higher concentrations in predatory fish species. This can have harmful effects on the fish themselves, as well as on the organisms that consume them.

Explanation:

Water pollution is the contamination of water by an excess amount of a substance that can cause harm to human beings and/or the ecosystem. Pollutants can enter water supplies from point sources, which are readily identifiable and relatively small locations, or nonpoint sources, which are large and more diffuse areas. Waterborne pollutants can have a significant impact on aquatic communities, affecting aquatic life and the overall ecosystem. For example, pollutants such as heavy metals like mercury and cadmium can biomagnify in the food chain, leading to higher concentrations of these toxins in predatory fish species. This can have harmful effects on not only the fish themselves, but also on the birds or humans that consume them. Biomagnification is a process where the concentration of a toxin increases as it moves up the food chain.

The measure of how a particular food affects blood glucose levels is the ______ index. glycemic glucose glycogen glyceride

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I believe the correct answer would be t he first option. The measure of how a particular food affects blood glucose levels is the glycemic index. It is a number used to measure the extent of effect of a particular food to an individual's blood glucose level. Having an index of 100 means that the food is pure glucose. It is the standard for the glycemic index. Foods that has a glycemic index of 55 and less are considered to be low and these foods are digested and metabolized in the body slowly which means that it will have a lower and slower effect on the blood sugar level.

ugh yuck biology .....help if you can .-.

Answers

The first answer because if you "multiply" the T's and the t's together they come out with TT, Tt, and tt

PS: This would be a lot easier to explain if I could show you how

A man who carries an allele of an x-linked gene will pass it on to

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A man who carries an allele of an X-linked gene will pass it on to all his daughters. The father will pass it on his son on his Y chromosome and the mother will permit on one of her X chromosomes. If they were having a daughter, the father would permit on his X chromosome, and the mother will permit on one of her X chromosomes. X linked dominant inheritance is a method of genetic inheritance by which a dominant gene is passed on the X chromosome. An inheritance pattern, it is a lesser amount of common than the X linked recessive kind.

Which is bigger a minha bird or a parrot?

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I believe a parrot but it depends on the bird

A plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. in the case of incomplete dominance, the flowers of the offspring will be

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R = red flowers
W = white flowers

homozygous red- RR
homozygous white- WW

complete dominance- red and white
codominance- whichever is dominant
incomplete dominance- pink

Incomplete dominance is defined as the genetic condition, in which a reduced ratio of the dominant allele is expressed. The offspring produced by the purebred parents is an intermediate between the two genotypes.

Let the genotype for purebred red flowers be - RR

Let the genotype for purebred white flowers be - WW

The cross between the true-breeding parent will is RR x WW.

The cross between purebred red and purebred white flowers will result in 100% pink progeny due to incomplete dominance.

Incomplete dominance is the phenomenon in which the dominant allele is expressed in the reduced ratio, such that the dominant allele does not mask the recessive allele completely, resulting in an intermediate offspring.

Therefore, the incomplete dominance will result in all the pink flowers, an intermediate between red and white flowers.

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What is the function of the immune system? It exchanges oxygen and carbon dioxide. It provides structure for the body. It eliminates waste from the body. It responds when pathogens enter the body.

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The function of the Immune System is to respond when pathogens enter the body.  The Immune System is not responsible for exchanging oxygen and carbon dioxide, that is the job of the Respiratory System.  It also does not provide structure for the body, that is the role of the Skeletal System.  And finally, the Excretory System is responsible for the removal of waste.

The statement 'it responds when pathogens enter the body' BEST describes the function of the immune system.

The immune system refers to different biological mechanisms and cellular components aimed at protecting the organism from diseases.

The immune system is composed of specific cells (e.g., T cells) and molecules (e.g., inflammatory cytokines and immunoglobulins) that recognize specific pathogens in order to destroy them.

The pathogenic microorganisms (e.g., bacteria) contain specific antigens that can be recognized by the components of the immune system.

In conclusion, the statement 'it responds when pathogens enter the body' BEST describes the function of the immune system.

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Increased secretion of aldosterone would result in a(n) ______________ of blood ____________? increase, potassium decrease, volume increase, calcium levels decrease, ph increase, sodium

Answers

Increased secretion of aldosterone would result in an increase in blood sodium levels. It is released by sensing the low blood pressure and acts by stimulating the kidneys to restore sodium levels. This increase the blood pressure and volume. 
The hormone is released by the adrenal cortex.

Blood type is an example of a trait that's inherited by

A. incomplete dominance.
B. gender-specific alleles.
C. polygenic inheritance.
D. codominance.


Answers

Blood type is an example of a trait that is inherited by codominance.

Blood type is an example of a trait that's inherited by co-dominance.

CO-DOMINANCE:

Co-dominance is a type of inheritance pattern in which the alleles of a gene are neither dominant nor recessive over one another, hence, are simultaneously expressed.

Co-dominance goes against the mendelian pattern of inheritance, which states that the dominant allele is expressed over the recessive allele.

In co-dominance, both alleles are physically expressed. An example is blood type inheritance where alleles A and B are both expressed in an individual with AB genotype.

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On a laboratory exam a student is asked to determine if the cell under a microscope are plant cell or animal cells. Where might the student look for

Answers

look for a cell wall or a large vacuole or a lysome

Epstein (1965) presented observers photographs of a quarter, dime, and half-dollar that were all equal in physical size. his results showed that _____.? a. ?familiar size is most effective when other information about depth is absent b. ?the quarter was judged to be closer than the dime, when viewed monocularly c. ?accommodation is a stronger cue than any pictorial depth cue d. ?familiar size is most effective when the observer has both eyes open

Answers

Epstein (1965) presented observers that photographs of a quarter, dime, and half-dollar were all equal in physical size. The photographs were at the same distance from the observers. Using only one eye the observer said that the dime was closest, the quarter was farther than the dime, and the half dollar was farthest of them all. Using two eyes this was not the result, because they were aware of the distance. So, this Epstein's results showed that familiar size is most effective when other information about depth is absent.

The ________ layer is composed of dense irregular connective tissue whose strength and toughness results from abundant _________ fibers

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The reticular layer is composed of dense irregular connective tissue whose strength and toughness results from abundant collagen fibers.
The reticular dermis of the skin has many collagen fibers to support it because it provides strength and acts as a cushion. It also has elastin fiber that makes it elasticity.

Using an example of your choice, explain why biotechnology can be both helpful and harmful to society and/or the environment.

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Biotechnology can be used to focus on a Genetically Engineered organism. it can be helpful when used for many good purposes, like increased Production of Proteins,Antibiotics and beneficial products. It can be harmful when used for Bio-Warfare, like Anthrax.

Can an experiment that has several variables be used to explain a theory

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According to The Nature of Theory and Research in Social Psychology, written by By Clyde Hendrick and Russell A. Jones. This can be possible, and if it does, the experiment can go between several variables and prove a theory across different more experiments. If an experiment then gives internal and external validity it answers questions that give a generalization. 

ow do scientists continue to gain a better understanding of the structure of atoms?



By studying atoms under a large microscope


By conducting experiments that expose their properties


By examining only the largest atoms


By splitting them apart

Answers

It should be by splitting them apart i learned this in Science a while ago but not to long ago.

A pulmonary perfusion imaging procedure is performed to diagnose pulmonary embolism and pulmonary trauma. the code for this procedure allows for imaging a patient:

Answers

The code for this procedure allows for imaging a patient twice.
A pulmonary perfusion imaging or pulmonary ventilation scan is used to check that how well air and blood are able to flow through your lungs. Pulmonary embolism is a condition in which two or more arteries are blocked by the blood clot in lungs and it is the fatal complication after the trauma.

The step in the scientific method in which a scientist compares experiment results with a hypothesis is___.

a. analysis
b. communication
c. observation
d. question

Answers

The step in the scientific method in which a scientist compares experiment results with a hypothesis is analysis

How should food be stored to avoid cross-contamination:
a. store ready-to-eat food on the bottom shelf, below raw meat
b. store meat with a higher cooking temperature below meat with a lower cooking temperature
c. store meat with a lower cooking temperature below meat with a higher cooking temperature
d. raw meat can be stored near ready-to-eat food if covered. submit answer?

Answers

The answer is letter b, it is because meat with higher cooking temperature should be at the bottom and the lower cooking temperature meat must be above them. It is because the higher cooking temperature meat are the ones who has exhibits more bacteria compared of the other foods, that's why it must be at the bottom to prevent cross contaminated.

Food should be stored to avoid cross-contamination by (A), store ready-to-eat food on the bottom shelf, below raw meat.

What is cross-contamination?

Cross-contamination is the transfer of harmful bacteria from one food to another. This can happen when raw meat juices drip onto other foods, or when utensils or cutting boards are not properly cleaned.

To avoid cross-contamination, it is important to store raw meat on the bottom shelf of the refrigerator, below ready-to-eat food. This will help to prevent the juices from raw meat from dripping onto other foods.

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A plant that reproduces sexually has flowers that contain both male pollen and a female ovary. The plant cross-pollinates and forms a fleshy fruit around its seeds. Which of the following is the most logical conclusion about the classification of this plant?
Coniferophyta
Anthophyta
Cycadophyta
Gnetophyta

Answers

The correction option is B. The plants that belong to phyllum anthophyta are heterosporous, that is, they produce both male and female reproductive organs separately. Fruits grow when the male gamete fertilizes the female ovary. Their fruits are always fleshy with seeds inside them. A good example of a plant that belong to this phylum is pawpaw.

Answer:    It is the anthophyta.  

Explanation:  Taking the test right now

What is the appropriate technique to stimulate a baby to breathe?

Answers

One can stimulate a baby to breathe by slapping  his butt or by flicking the soles of his feet. This is normally done in order to stimulate a baby to take his first breath through the process of crying. Crying will force the baby to take his first breath and at the same time, it will enable the lungs and the airways to be cleared of liquid substances. 
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