When a person stands the heart needs to pump blood against gravity, to reach areas of importance like the brain, thus veins work hard to pump it back toy the heart. As a person reclines their blood pressure decreases, because the person is more relaxed. Also it slows down the persons breathing and heart rate. There is also an increase in oxygen in order to support the body. The difference between when a person is standing and person who is reclined is that the heart works harder while the person is standing. The blood that reaches the legs has to travel up thus going against gravity. An increased blood pressure means that a lot of the blood wont flow back to the heart. When you are standing a persons muscles are in a contractile state using ATP leading to more blood use to ensure muscle contractions occur. When you are lying down your muscles are no longer in a contractile state thus ATP is not required (less energy usage). High blood pressure is a major health concern because it may cause weak vessels in the brain leading to a stroke, and an increase in blood pressure in the eyes leading to blindness. Also causing the narrowing and thickening of the blood vessels in the kidney(s), thus filtering less waste, and a cause of kidney failure. This also causes the hardening of the arteries in the heart leading to a heart attack. An athlete must train longer and harder to achieve maximum heart rate than a person who is not a physically fit because the athletes body has…
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AP® Biology investigAtive lABs: - The College Board
source or overlooked a publisher, please contact us. ... (Visit the College Board on the Web: www.collegeboard.org.) 1 2 3 4 5 ... made significant contributions to the new lab manual. ..... biological concepts while developing reasoning…
virtually everything that
humans are or do (and the same goes for any species) affects their distribution and abundance. Thus, using the term “human ecology” actually expresses a broad ambition to understand human behavior.
B. Borrowing Concepts from Biology
The basic rationale for human ecology is that concepts and methods shared with the
biological sciences ought to be useful to understand human behavior. Our behavior is taken
to be just a special case of general ecological processes (as any particular…
March 6th, 2012
The coyote in eastern Washington is very big component of the ecosystem. An average adult coyote is the size of a golden retriever dog and eats mice, rodents and various birds such as quail, doves and pheasants. Coyotes are a grey color and can be found clumped in packs. They will hunt at night or day, whenever they need to find food, but are primarily day time creatures. They only have pups once a year, in the spring, and they have them in litters.…
What to know?
1. Neutrons are neutral, makes up nucleus, and weighs about 1 dalton
2. Protons are positive, make up nucleus, are equal to # of electrons
3. Electrons are negative; randomly surround the nucleus, and equal # of protons. The amount of these determines the chemical properties and reactivity of an atom.
Hydrogen: One electron, Carbon: 6 electrons, Nitrogen: 7 electrons, Oxygen: 8 electrons.
4. Salts in the body, like Calcium, Potassium, and Sodium Chloride and Iron, are all ionicly…
John Jay High School
Dear Future AP Biology Students:
Welcome to AP Biology! It is hard to imagine that the school year is coming to a close and it is time to think about the 2013-14 school year. We are looking forward to another great year of AP Biology with another fantastic group of students. As you may know, there are some changes to the AP Biology program for 2013-2014, and we are ready! AP Biology is a challenging but very rewarding course and we will have…
Reactants of a chemical reaction need to gain energy before they can undergo the reaction. This required energy is called the activation energy of the reaction and it is needed to break bonds within the reactants. At a later stage in the reaction energy will be released as new bonds form. The majority of biological reactions are exothermic. In exothermic reactions the energy released by the new bonds formed is greater than the activation energy. In other words, the reaction releases energy. Enzymes…
AP Biology Period 6
Grains of Hope Article Summary
The research advances made over the past twenty years have moved genetic engineering and biotechnology onto the American and world landscapes. The public has long accepted new technology as being beneficial without much challenge. There is a growing understanding that new technologies have costs, risks, and benefits associated that are not necessarily distributed evenly across the population. This article is about the golden…
as the ratio becomes smaller
The .8 color solution had a final mass of 16.29g and the initial mass was 17.37g. So we did 16.29-17.37 x 100\17.39 which gave us -6.217%
When glucose is oxidized by cellular respiration, energy is released.
Atp - adp
Our data consisted of chi squared equations to find our expected and observed ratios. How does this evidence show skill?:
After obtaining the new potato core’s change in mass due to sucrose molarities, we were able to correctly…
Ever thought of the greatest opportunities to live our values and yet betray them with
the lies in the food that we put on our plates.How many people today take advantage of the smallest
things, but don’t see the big impact on it. Did you ever question your self what types of food are you
eating, or where it comes from. How most things about our food is kept behind closed gates and labels