Biology 3466B Lecture Notes - Lecture 6: Homo Sapiens, Introduced Species, Bay Checkerspot Butterfly

(Finance Healthcare) Keep your response or summary to one page. How Much does the U.S. Spend on Healthcare?​ Articule analisys is How much does the U.S. spend to treat different diseases? Information below!

1. Circulatory and ill-defined conditions, such as check-ups, are the largest categories of health spending.Circulatory conditions had been the largest contributor to health spending, for at least a decade, until 2012 when they were surpassed in total spending by ill-defined conditions (a category including check-ups, follow-up appointments, preventive care, and treatment of minor conditions such as colds, flus, and allergies). In 2012, about $250 billion was spent on ill-defined conditions, and $243 billion went toward the treatment of circulatory conditions.

2. The top 5 disease categories account for roughly half of spending. The top five disease-based spending categories (ill-defined conditions, circulatory, musculoskeletal, respiratory, endocrine, and nervous system conditions) account for roughly half (51%) of all medical services spending by disease category. Circulatory and ill-defined conditions each represent about 13% of overall health spending by disease and musculoskeletal, respiratory, and endocrine conditions represent 10%, 8%, and 7% respectively.

3. Spending grew fastest for ill-defined conditions and slowest for circulatory conditions from 2000 - 2012. From 2000 – 2012, among the major disease categories in the chart above, the fastest spending growth was on ill-defined conditions and endocrine disorders.

4. About a third of medical services cost growth was from ill-defined, musculoskeletal, and circulatory conditions. Ill-defined conditions accounted for 16.6% of medical services spending growth. Treatments for musculoskeletal disorders (which include back problems and arthritis) and circulatory diseases were the second and third largest contributors to overall health services spending growth over the 2000 – 2012 period. Together, these three disease areas account for 36% of health services spending growth by disease. While spending on the category of circulatory diseases grew slowest of all disease categories, it still accounts for a substantial portion of overall growth because it is such a large area of spending.

4. Among major disease categories, the cost per case grew fastest for infectious diseases.

The cost of treating infectious diseases has grown faster than any category (the price index for this category grew at an average annual growth rate of 6.1% from 2000 to 2012).

Price indexes in the Health Care Satellite Account differ from official price indexes in that they are not only influenced by the price of a given treatment, but also by greater treatment intensity per visit, shifts from lower-cost to higher-cost treatments, and movement into less restrictive insurance plans.

5.The number of treated cases grew fastest for endocrine disorders and ill-defined conditions​. The number of treated cases grew fastest for ill-defined conditions and endocrine disorders, each at an average annual growth rate of 4.3% from 2000-2012. (Because the spending changes above adjust for treatment cost, they primarily represent changes in the number of cases over the time period.)

6. The cost per case has grown faster than the number of treated cases in most years since 2001. Over the 2000 – 2012 period, the cost per case generally grew faster than the number of treated cases. 2012 was the first time in recent years that the number of treated cases grew faster than the cost per case​.

7.Increases in prices and service intensity have driven most of spending growth.

Over the 2000 – 2012 period, about 65% of per capita spending growth can be attributed to growth in the cost per case, with the remaining 35% due to non-price factors. (This estimate differs from that previously released by the BEA because the number of treated cases started to drive growth relatively more in the most recent years.)

8. Major disease categories have mostly seen better outcomes along with higher spending. Assessing the value of health care spending is challenging for a number of reasons (including limited availability of outcomes data, differences in categorization between data sources, and inability to control for socioeconomic and other external factors that influence health). Disability Adjusted Life Years (DALYs) are one way to measure health outcomes that account for both premature death and years lived with disability. In the 2005 – 2010 period, the increase in per capita spending generally corresponded with an improvement in DALYs. A study done by researchers at the BEA comparing spending and outcomes across 30 chronic conditions from 1987 - 2010 found that “overall gains in health outcomes for the population more than offset the increase in the average cost of treatment, suggesting a positive net value for medical spending.”

As temperatures in an African savanna increase and rainfall decreases, it would most likely change into

tiaga

desert

tropical rainforest

temperate forest

What is imprinting? Give an example.

fixed assocation, such as hatching ducks recognizing the first animal they see as their mother

a learned behavior, such as a wasp circling during a search for food, so that it can return to its nest

alteration of instinct, such as a spider changing the type of web it weaves depending upon the environment

Opportunistic species

provide extensive care for their offspring

produce many offspring

reproduce later in life

What are the five agents of microevolution?

gamete production; mating; fertilization; caring for offspring; formation of herds

photosynthesis; respiration; mitosis; meiosis; fertilization

mutation; gene flow; nonrandom mating; genetic drift; natural selection

Microevolution is

new species

minor extinction of species

changes in allele frequency in a population

Which of the following is does not help defend against predators?

Toxins made by plants that injure caterpillars feeding on the plant

The large eyespots on a moth's wing that can startle a hungry bird

Thorns on a plant

Many plants have brightly colored fruit and flowers

Humans have a favored birth weight, neither too small nor too large. This is

stabilizing selection

disruptive selection

artificial selection

directional selection

What is a keystone species?

the first organism that populates an area

an organism upon which the entire ecosystem depends

the first fossils found in the earliest rock strata

As temperatures in the Arctic warm, which of the following changes may occur?

Tundra will be replaced by taiga

Taiga will be replaced by tundra

Temperate forest will be replaced by taiga

Tundra will be replaced by desert

Taiga will be replaced by temperate rain forest

What is desertification?

restoration of vegetation and water to deserts

areas adjacent to deserts also become deserts

abandonment of a habitat by animals

Evolution occurs at the level of

individuals

populations

communities

The maximum population that the environment can support is called the

biotic potential

environmental resistance

carrying capacity

replacement reproduction

demographic transition

A population with relatively more pre-reproductive individuals is common in _____-developed countries

more

less

Endangered species sometimes breed in captivity. Why are such species endangered in the wild?

Their population density is too high

Loss of habitat

Their environment is polluted

Abiotic components of an ecosystem include

only animal life

only plant life

living components only

nonliving components only

both living and nonliving components

Carbon returns to the atmosphere

as carbon dioxide

from respiration of plants

by the burning of fossil fuels

from respiration of animals

All of the answer choices are correct

Why does the Tropical Rain Forest contain an abundance of antibiotic compounds?

The area is crowded, leading to random production of useful compounds

The area is wet. plants had to develop resistance to fungi and bacterial infections

There is a great diversity of plants, leading to random production of useful compounds

The carrying capacity of the environment for a species is determined by

the reproductive rate of the organism

the number of organisms of that species

the state and national wildlife laws pertaining to that species

a complex

the limited productivity of the environment and the environmental resistance to the biotic potential of the organism

An introduced species that breeds and spreads is

resourceful

harmful

native

dominant

invasive

What is disruptive selection?

environmental influences that select against change

environmental influences that promote one phenotype versus all others

environmental influences that promote two or more phenotypes versus all others

Natural selection acts on

individuals

populations

communities

Two populations of birds live in the same area but have different sleep/wake cycles. This is

behavorial isolation

mechanical isolation

geographical isolation

temporal isolation

An insect that resembles the face of a snake avoids predation by

camouflage

warning coloration

mimicry

chemical defense

mutualism

Unselfish acts that help others in a group so that they increase their chances of surviving and reproducing is called

imprinting

mimicry

altruism

learning

instinct

If an environment changes rapidly, organisms with ____ will be more likely to survive and reproduce.

the correct allele frequency

existing neutral mutations

existing beneficial mutations

How did geology influence Darwin’s thoughts?

It demonstrated that the earth was very old, therefore there was enough time for species to evolve

it demonstrated that all continents were similar

it demonstrated the presence of many fossils

The founder effect occurs when

large groups of individuals leave their home population and establish new settlements, mating only among themselves

many members of a population die, resulting in a great loss of genetic diversity

many members of a population reproduce causing too much genetic diversity within the population

small groups of individuals leave their home population and establish new settlements, mating only among themselves.

The greenhouse effect is due to high atmospheric

Nitrogen

Ammonia

Carbon monoxide

Carbon dioxide

Oxygen

What are the Reproductive Barriers that keep species separate?

lack of food; lack of habitat; lack of potential mates; lack of nesting sites; lack of genetic variation

mountains; canyons; glaciers; bodies of water (for terrestrial animals); areas of land (for aquatic animals)

habitat isolation; temporal isolation; behavioral isolation; mechanical isolation; gamete isolation

What is directional selection?

environmental influences that select against change

environmental influences that promote one phenotype versus all others

environmental influences that promote two or more phenotypes versus all others

Which of the following is correct when describing a predator-prey cycle?

A decline in the numbers of predators causes a decline in the number of prey

A decline in the numbers of prey causes a decline in the number of predators

An increase in the number of predators triggers an increase in the number of prey

An up-and-down cycle will be seen for the prey animal

A seasonal die-off that will occur without the other species present

Why are top-level predators (lions, eagles, humans) so rare in a community?

Only a small amount of the energy is passed from one trophic level to the next

They do not breed as fast as other animals

Because of predation by higher predators

It is difficult for them to learn how to capture prey

Their job is to keep the population size of other animals in check

Alleles conferring bright color to male guppies are common because

they make males less visible to predators

they help males identify each other

they are preferred by females

Organisms that obtain their energy from producers or other consumers are

autotroph

heterotroph

producer

autotroph and producer

heterotroph and producer

What is the environmental impact of strip mining?

lack of trees exposes the surface of the earth, promoting runoff and loss of adjacent trees

removal of minerals from the soil hampers growth of vegetation

it causes a potential increase in volcanic activity

Two populations of squirrels are separated by a mountain range and would not be capable of interbreeding. This is an example of:

behavorial isolation

mechanical isolation

geographical isolation

temporal isolation

What is a danger of overfishing?

humans will become dependent upon fish

selection for smarter fish that can avoid being caught

driving the population back into the lag phase

What is meant by prezygotic versus postzygotic speciation mechanisms?

before versus after formation of a zygote

before versus after meiosis

before versus after gamete formation

The relatively short term changes in allele frequencies within a species or population is

artificial selection

microevolution.

speciation

macroevolution

Avoidance of a location with predators is the result of

imprinting

mimicry

altruism

learning

instinct

What is the difference between Density-Dependent and Density-Independent Factors on populations?

density-dependent factors exert a greater influence when there are more individuals; density-independent exerts the same influence on all individuals regardless of their number

density-dependent factors exert a greater influence on larger, more dense individuals; density-independent factors exert the same impact on individuals of all size

density-dependent factors exert the same influence on all individuals regardless of their number; density-independent factors exert a greater influence when there are more individuals regardless of their number

All of the organisms in a given location or area is termed a

peer group

flock

community

population

herd

The concentration of the pesticide DDT would be highest in

a minnow

a mosquito larva

a seagull

plankton

algae

Our biosphere is

the Earth

the atmosphere

the ocean

land on Earth

fresh and salt water

What is meant by “carrying capacity”?

the amount of food produced in an ecosystem

the extent of energy required to maintain an ecosystem

the number of individuals that can be supported by an ecosystem

Species living on another is

resource partitioning

coevolution

symbiosis

predation

niche sharing

One species feeding on another is

competition

a community

an ecosystem

predation

symbiosis

Populations of different species interacting with one another in a natural environment is called

competition

a community

a biome

predation

symbiosis

Which of the following is not a biogeochemical cycle?

ATP cycle

water cycle

carbon cycle

phosphorus cycle

nitrogen cycle

Horses became larger and faster to escape predators. This is

stabilizing selection

disruptive selection

artificial selection

directional selection