aorta bio stpm

7/28/2019 Aorta Bio Stpm

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aorta the _________ and longest artery (a blood vessel carrying

blood away from the heart) in the body. It carries _________

blood from the _________ ventricle of the heart to the body.

nferior vena

cava

a large vein (a blood vessel carrying blood to the heart) that

carries _________ blood to the _________ atrium from thelower half of the body.

eft atrium the left upper chamber of the heart. It receives oxygen-rich

blood from the _________ via the _________ vein.

eft ventricle the left lower chamber of the heart. It pumps the blood into

the _________.

mitral valve the valve between the left atrium and the left ventricle. Itprevents the _________ back-flow of blood from the ventricle

to the atrium.

pulmonary

artery

the blood vessel that carries oxygen-poor blood from the right

ventricle of the heart to the _________ lungs.

pulmonary

valve

the flaps between the right ventricle and the pulmonary artery.

When the ventricle contracts, the valve _________ opens,causing blood to rush into the pulmonary artery. When the

ventricle relaxes, the valves close, preventing the back-flow of

blood from the pulmonary artery to the right atrium.

pulmonary

vein

the blood vessel that carries oxygen-rich blood from the lungs

to the left atrium of the heart.

Biggest oxygen-rich left oxygen-poor right lungs

Pulmonary aorta



right atrium the right upper chamber of the heart. It receives oxygen-poor

blood from the body through the inferior vena cava and the

superior vena cava.

right

ventricle

the right lower chamber of the heart. It pumps the blood into

the pulmonary artery.

septum the muscular wall that separates the left and right sides of the

heart.

superior vena

cava

a large vein that carries oxygen-poor blood to the right atrium

from the upper parts of the body.

tricuspid

valve

the flaps between the right atrium and the right ventricle. It is

composed of three leaf-like parts and prevents the back-flow

of blood from the ventricle to the atrium.

1. Outline how DNA replicates semiconservatively-

the double helix is untwisted, the hydrogen bonds between the bases are broken apart and ‘unzip’ to expose t bases, free DNA nucleotides are hydrogen bonded onto the exposed bases according to the base pairing rule

T G-C, covalent bonds are formed between the phosphate of one nucleotide and the sugar of the next to seal backbone

2. Define the term anti-parallel prallel, but with chains running in opposite directions

3. Write down the complimentary strand sequence for DNA and RNA-

ATTAGGCTAT DNA TAATCCGATA RNA UAAUCCGAUA4. If a DNA is 20% Thymine, what percentage of each of the other types would it contain?

20% Adenine, 30% Cytosine, 30% Guanine

5. What type of disease can result from DNA copying going wrong?Cancer may occur if DNA is not copied properly

1. Explain why the MRNA strand produced in the nucleus is complementary to the template strand, and a copythe coding strand

complementary RNA nucleotides are lined up against each base on the template strand, producing a

complementary strand. As base pairing rules apply, this lining up will be the same as it appears on the coding

strand- apart from U in RNA replacing T in DNA 2. If a DNA template strand code reads ATTCGCGTTAAT, what would the complementary MRNA strand rea

UAAGCGCAAUUA 3. Suggest why MRNA is less stable than DNA, and explain why this is a necessary feature of MRNA

RNA is single stranded and so less stable, as nucleotide bases are exposed and not paired. It also contains ura

instead of thymine, which may contribute to the lower stability of the molecule. mRNA results in the produc



of proteins. If the cell is to control protein production, the disintegration of mRNA stops too much of a certa

protein being made, and so allows for regulation of the protein levels in a cell

4. Make a table to compare and contrast the structure of DNA with that of RNA

aorta bio stpm

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