Understanding the Pericardium (Pericardial Sac) Your heart is surrounded by a double-layered membrane, called the pericardium or pericardial sac. This membrane keeps your heart in place in your chest cavity, restricts the expansion of your heart when your blood volume increases, and helps to protect your heart
Answer:
The pericardium acts as mechanical protection for the heart and big vessels, and a lubrication to reduce friction between the heart and the surrounding structures. A very important role in all aspects of pericardial functions is played by mesothelial cells.
A student likes to attend football games, no matter how cold and snowy the weather becomes. She is going to a game on a very cold day and takes along a hand warmer. She activates it and tucks it into the glove she is wearing. She holds her hands together, and before long, her hands are warm. Which best describes how her hands were warmed?
a: Heat was transferred by conduction, resulting in an increase in kinetic energy.
b: Heat was transformed by convection, resulting in the conservation of energy
c: Thermal energy was transferred by currents, resulting in an increase in kinetic energy.
d: Heat was transformed by radiation, resulting in an increase in kinetic energy.
Answer:
The correct answer is - a: Heat was transferred by conduction, resulting in an increase in kinetic energy.
Explanation:
Conduction is ne of the het transfer method where particular substance is heated and increase the kinetic energy which leads to the molecules to vibrate more and move or jump to the particles present in neughbouring substance and transfer some part of the enrgy.
This transfer is a continuous process untill both end become of same temperature of have same kinetic energy, In this case, heat is tranfer ffrom hand to gloves and to the other hand which are hold together after activating them.
2. This body system sends out scouts to recognize pathogens such as
bacteria and viruses. Once identified, it produces antibodies to attack
and kill the pathogen. What body system is being described?
A-Immune
B-cardiovascular
C-muscular
D-digestive
PLEASE HELPPP!
I hateeee science
Answer:
Advantages:Solar:does not pollute,Renewable energy
Disadvantages:Expensive,Uses a lot of space
Disadvantages Wind:The wind is inconsistent,May reduce the local bird population
Advantages:unlimited, free, renewable resource
Biofuels Advantages:Cost-Benefit.
Disadvantage:Monoculture. Use of Fertilizers.
Nuclear fusion disadvantages:Scaling down the sun
Advantages:potential advantages of nuclear fusion energy are manifold, as it represents a long-term, sustainable, economic and safe energy source for electricity generation.
Fuel Cells:Advantages: Hydrogen fuel cells emit only water, so there are no carbon dioxide emissions and no air pollutants that create smog and cause health problems at the point of operation.
Disadvantages:fuel cells and electric motors are less durable than petrol engines and diesel engines, so they are not so long-lasting
Wave Power Advantages:Suitable to Certain Locations. The biggest disadvantage to getting your energy from the waves is location.
Effect on Marine Ecosystem
advantages:the energy is renewable
Geothermal Advantages:Environmentally Friendly. Geothermal energy is more environmentally friendly than conventional fuel sources such as coal and other fossil fuels.
Renewable.
disadvantages:Environmental issues. There is an abundance of greenhouse gases below the surface of the earth.
Coal disadvantage:The major disadvantage of coal is its negative impact on the environment.
Advantage:oal is easy to burn.Coal produces high energy upon combustion.
Oil :Advantages:Oil has High Energy Density. Oil is Easily Available.
Disagavantege:Oil is a non-renewable source of energy. Burning oil produces carbon dioxide gas
Natural Gases disadvantages:Gas is highly flammable, which means leaks can result in explosions.Natural gas is toxic.
Advantages:Natural gas is environmentally friendly because it burns cleaner than other fossil fuels.
Explanation:
True or False:
Reverse faults have the same structure as normal faults, but the blocks move in opposite
directions
Answer:
f
Explanation:
Answer:
True
Explanation:
What do I put in the chart? Picture attached
Answer:
The woman's genotype - Bb
The man's genotype - bb
Chances of having a child with blue eyes - 50%
Chances of having a child with brown eyes - 50%
Explanation:
Many of our traits are determined by our genetics. We inherit genetic information from both of our parents. From each of them, we get one copy of a gene that determines a certain trait. These gene copies are called alleles.
The dominant allele is the one that masks the effect of the other type of allele, called the recessive allele. This means that a person needs to have only one dominant allele in order for its effect to be expressed. In order for the effect of the recessive allele to be expressed, the person needs to have two recessive alleles.
If a man has blue eyes, which is a recessive trait, he needs to have two recessive alleles (bb). This is why the genotype of the man is bb.
If his child has blue eyes, this means that its genotype is bb as well. The mother's eyes are brown, which means that she needs to have at least one recessive allele. Based on this, we can conclude that her genotype is Bb.
Since the mother has one dominant allele, this means that her children could have brown eyes as well. This is what the Punnett square would look like:
B b
b Bb bb
b Bb bb
Two out of four children would have brown eyes, and the other two would have blue eyes. This means that their chances of them having a child with blue eyes are 50%. The chances of them having a child with brown eyes are the same.
2. Would you be able to get energy from food if there weren’t chemical reactions in your body?
Answer:
no
Explanation:
we would not get any energy from food because nothing would happen (no chemical reaction)
Answer:
if we eat food we get energy, but if there weren't chemical reaction in your body nothing happens.
Explanation:
Newton's first law of motion states that an object will remain in motion in a straight line unless compelled to change direction by an external force.
Explain why satellites launched into orbit do not continue moving in a straight line. Make a connection between satellites and planets.
Explanation:
When satellites are launched into orbit, they are able to orbit around planets due to the gravitational force of attraction between the satellite and planet (usually there is no apparent change in motion of the planet because of its relative huge size than the satellite)
This gravitational force is in a different direction than the satellite's motion, therefore it keeps it orbiting around planets and does not continue moving in a straight line.
Describe the carbon atom:
A clump of carbon
A sole carbon particle
(which one? and explain your answer)
Answer:
carbon particle is a form of carbon atom batch
Water clarity or turbidity, Measures the amount of sediment and debris In a body of water since light cannot sign into water with no clarity, turbidity Is a factor that is considered when monitoring water quality which of the following organisms would be most negatively affected by unclear water?
A. Geese nesting on the bank of the lake
B.trees growing along the lake shore
C.plants growing on the lake floor
D. Trout feeding near the lake surface
Answer:
b
Explanation:
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example of natural selection
PLEASE HELP !!!!!!!
20 POINTS
Answer:
Explanation:
Skeletal Adaptations. Giraffes, lizards, and many other known species adapted to their environments through genetic changes to their skeletons. Coloration. Many species have been studied who've adapted to their environment through adaptions in coloring. Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds. However, natural selection does not always go to the optimum. An example of variation is that I have a cat with black fur and one with yellow fur. Trait that can be PASSED DOWN to offspring through genes. Inherited characteristic that INCREASES an organism's chance of survival or reproduction in its environment.
What kind of tools did Neanderthals use in their daily lives?
Answer:
they made bone tipped wooden spears Nd hafted cutting or scraping tools and they made various things for adhesive.
What do you think would happen to the process of cell division if there is a deficiency in the Golgi apparatus's ability to package protein tubule materials?
Answer:
The process of cell division will slow down and the cell will die
Explanation:
Without the golgi apparatus or if its not working as well as it should be there would be no lysosomes or less. Without the lysosomes there will be a lot of junk/trash in the cell and it would have no way to break it down and get it out
Single-celled pond organisms have contractile vacuoles that maintain water balance within each cell. This is a an example of what scientific principle?
Answer:
The correct answer is homeostasis.
Explanation:
A self-regulating procedure taking place within an organism, which permits them to sustain a stable internal condition level is termed as homeostasis. In case, if an organism fails to sustain homeostatic balance, the eventual result would be death. Water balance, temperature, salt concentration, and pH are some of the several internal conditions, which are required to maintain comparatively stability.
Some of the single-celled pond organisms like paramecium comprise contractile vacuoles, which remove additional water out of the cell. As water balance is a part of sustaining homeostatic balance for an organism, thus one can study homeostasis by witnessing the modifications within the contractile vacuole when the species is placed in distinct solutions.
Explain what are ethics.
What are your feelings toward HeLa cells? (in at least 4 sentences)
Ethics are principles that govern a person’s behavior or the conducting of an activity
Answer:
HeLa cells are a great find in the science community and Henrietta Lacks' unique cells are still helping us today. They are perfect for important studies such as cancer, cell biology, genetics, and infectious diseases. Since now we have these unique immortal cells it is quite easy to start any scientific testing on human cells since their is an endless supply. Personally, I believe Henrietta Lacks will live on forever as a hero and mother of modern scientific advancements, since she quite literally, grew all of the modern cell research we have today.
Explanation:
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Which resource is sometimes unpredictable in terms of energy production?
coal
wood
gasoline
natural gas
Answer:
Natural gas
Explanation:
Answer:
The answer is Natural gas
Explanation:
Name two actions
that you could take to reduce elephant poaching.
Answer:
increase protection and communal conservancies
Explanation:
increase protection this one is a fairly basic solution, there are many different ways of implementing it. Some park protection agencies in Africa use drones to keep watch at night, while others have sought out military tactics in order to stop black market poachers. Communal conservancies despite global trends, Namibia has done something extraordinary. Between the years of 2002 and 2013, the elephant population has grown from 9,600 to 16,000. The government of Namibia has policies in action where local communities can establish wildlife tourism, and where communities can keep vast amounts of the revenue made.
How is the Grand Canyon a "geologic time
machine"?
Answer:
because of joe dirt
Explanation:
When 1-year-old Amanda feels hungry, she begins to cry. She is in Piaget's
stage.
Answer:
Where is the question
Explanation:
The process of carbohydrate digestion begins when the complex carbohydrate starch is broken down into maltose. Which enzyme breaks these down into monomers and where are they found
First of all an enzyme called amylase present in the saliva breaks down starch into maltose
starch----(amylase)--->maltose
an enzyme secreted by the small intestine, called maltase breaks down maltose into two glucose molecules
maltose---(malstase)--->2glucose
White flower (p) color is recessive to purple flower color (P) in pea plants. If a pea plant has white flowers, what is the genotype and phenotype of the pea plant? HELPPPPP
Answer: pp and phenotype is white
Explanation: white is recessive, so either one or two P (PP or Pp) gives purple. only pp gives white
An Olympic sprinter has just broken the world record for the 100-meter dash. Which process will her body likely use to recover from her “oxygen debt”?
Answer:
Anaerobic respiration
Explanation:
In anaerobic respiration, glucose breaks down without oxygen. The chemical reaction transfers energy from glucose to the cell. Anaerobic respiration produces lactic acid, rather than carbon dioxide and water.
The process through which the Olympic sprinter's body will likely use to recover from her “oxygen debt” is: an anaerobic respiration.
Anaerobic respiration can be defined as a chemical and biological process that involves the use of electron acceptor rather than oxygen to make energy (adenosine triphosphate) from carbohydrates (sugars).
Hence, an anaerobic respiration can take place or occur in the absence of oxygen.
On a related note, an anaerobic respiration is used to regain lost energy through the actions of electron acceptor when oxygen is lacking in the body.
In conclusion, the Olympic sprinter's body will likely use anaerobic respiration to recover from her “oxygen debt.”
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what do alkali metals and alkaline earth metals have in common? how are they different?
Answer: Alkali metals and alkaline earth metals both have chemical reactivity to air and water.
Alkali are in group 1 of the periodic table. Alkaline earth metals are in in group 2 of the periodic table. The main difference between alkaline and alkali is that alkali metals have one valence electron, when alkaline earth metals have two valence electrons.
Explanation:
You notice that a group of students went on a hiking trip to Cockscomb basin. They are asked to climb a hill, by the time they reach the top of the hill some of them are almost out of breath, while others don't even make it to the top of the hill. Only a few seem not to be affected much by the climb. Plan and design an experiment in which you offer a possible explanation for the differences in breathing rate.
Answer:
It depends on the stamina of the individual.
Explanation:
The possible explanation for the differences in breathing rate is related to the daily activities of the individuals. For example, if the daily activities of the people are hard so it has big stamina and experience no difficulty in the climbing of a hill while those people who has little hard daily activities have low stamina and their breathing rates increases while climbing a hill. Where as those people who perform no daily activities have no stamina and will be unable to climb on the hill.
5. What is the response of an ectotherm, such as a lizard, when it encounters cold temperatures?
It will move to a warmer spot.
It will remain in the cold environment.
It will run toward the stimulus.
It will become hungry.
Answer:
It will move to a warmer spot.
Explanation:
An ectothermic animal, also known as a "cold-blooded" animal, is one that cannot regulate its body temperature, so its body temperature varies depending on the environment.
Many ectotherms live in environments that require little regulation, such as the ocean because the ambient temperature tends to stay the same.
Yeasts are unicellular microorganisms of the fungi kingdom that can digest sugars using both aerobic and anaerobic cellular respiration. In the below experiment, what by-product of this reaction causes the balloons to expand?
Answer:
This question is incomplete as it does not contain the representation of the experiment, however, based on general understanding, the answer is:
Carbon dioxide (CO2)
Explanation:
Yeasts, as stated in this question, are living unicellular organisms that belong to the KINGDOM FUNGI. They employ both the aerobic (with oxygen) and anaerobic respiration (without oxygen) in breaking down sugars. However, both methods of cellular respiration gives off CARBON DIOXIDE (CO2) as a byproduct.
Therefore, when a yeast is placed in a balloon in accordance to this experiment and is allowed to perform respiration either aerobically or anaerobically, it gives off CO2 gas, which causes the balloon to expand.
The state of Georgia has seen their water table become lower. What does this mean?
A. The amount of groundwater is increasing.
B. Their groundwater is flowing to confined aquifers.
C. The amount of groundwater is decreasing.
D. heir groundwater is being recharged by rain.
Answer:
The amount of groundwater is decreasing.
Explanation:
The water table is the top of the groundwater in the Earth. The greater its depth in the Earth, the less groundwater is in the aquifer below.
Which statement would be used in an argument against the use of human embryonic stem cells for therapy? A.Obtaining embryonic stem cells for use in therapy requires the destruction of embryos. B.Embryonic stem cells are limited in their ability to become different types of cells. C.It is difficult to grow embryonic stem cells in laboratory cultures, so they are not a practical choice for stem cell therapy. D.Embryonic stem cells originate in plants, so the likelihood of rejection by a patient's body is high.
Answer:
A.Obtaining embryonic stem cells for use in therapy requires the destruction of embryos.
Explanation:
Research involving human embryonic stem cells is subject to ethical and political debate because these investigations involve the destruction of human embryos. Stem cells have a series of advantages in the field of organ/tissue regeneration, to investigate the etiology of degenerative diseases, therapeutic cell cloning, etc. However, in many countries, the moment where life begins is a controversial point, and therefore this issue must be defined clearly before research.
The statement, that is, obtaining stem cells for utilization in therapy requires the destruction of embryos would be an argument against the use of human embryonic stem cells for therapy.
These are the pluripotent stem cells obtained from the inner cell mass of a blastocyst, that is, an initial stage pre-implantation embryo.
Research on human embryonic stem cells is subject to political and ethical debate, as these researches comprise the destruction and killing of human embryos. In the field of organ or tissue regeneration, the stem cells possesses an array of merits, they can play an essential role in therapeutic cell cloning, and to determine the etiology of degenerative disease.
But in many countries, the instance when the beginning of life has taken place is an ethical issue, thus, there is a requirement of clearly defining the issue prior to performing any kind of research.
Thus, the correct answer is option A.
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Amino acids are units of
Answer:
Amino acids are the structural units (monomers) that make up proteins. They join together to form short polymer chains called peptides or longer chains called either polypeptides or proteins. These polymers are linear and unbranched, with each amino acid within the chain attached to two neighboring amino acids.
Explanation:
How can a bacterium ensure that there is always a concentration gradient that will drive passive transport of food molecules into its cell?
Answer:
There are two major ways that molecules can be moved across a membrane, and ... is trying to be evenly distributed everywhere, like dropping food coloring in water. ... These channels are almost always specific for either a certain molecule or a ... When a molecule moves down its concentration gradient is it participating.
When a solute particle from the region of high concentration travels towards the region containing the lower solute particle is called passive transport. It is transported easily without spending energy.
Bacteria ensures that the food molecule from the surrounding will transport through the passive transport system by the concentration gradient as molecules can get in the cell by two processes.
Concentration gradient allows the movement of food from the region of high concentration towards the region of low concentration that is in the bacterial cells.
Bacterial membrane permits the movement of food molecules across its membrane easily.
Therefore food is transported to the bacteria through passive transport.
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how is covalent bonding important to human beings?
Answer: They are found in proteins and DNA.
Explanation:
Covalent bonding is important to human beings because they are commonly found in carbon-based organic molecules which are considering proteins and DNA which are found in the human body.
There are three types of chemical bonds that are very important in the human body and physiology
