Biology, 02.08.2019 15:00 brandoncarter2002

Sarah and jane were playing basketball. they collided and fell. sarah’s knee was lightly bruised. jane’s elbow was scratched, causing a little blood to ooze out. after a few days, jane observed pus formation around the scratch on her elbow, while sarah’s knee was fine. the pus formation on jane’s elbow is a result of . the receptors on the sensed the pain that jane experienced.

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What happens on Jane's elbow?
when a skin is scratched, the internal medium of the body enter directly in contact with the external environment, this could lead bacteria (saprophytic bacteria which lives on the skin, or bacteria from another source) it will provoke an inflammatory reaction to these pathogens and so, a pus will be formed (generally composed by dead neutrophils and purulent bacteria).

What happened on Sarah's knee?
The knee was just bruised, there's not skin scratching, it is still intact, so bacteria cannot go into the body through this injury. It just takes colors (red, blue, then yellow due to the rupture of capillaries which release blood, then will be degraded in bilirubin)

Answer from: MilanPatel

Blank 1: Inflammation

Blank 2: Dermis

Explanation: Inflammation is a response of the body when any foreign particle or any pathogen enters the body and comes in contact with the layers of skin blow epidermis or even blood. In such a response, the immune cells reach the site of bruise and kill the pathogens. The pain in the affected region is a part of inflammation response. And pus is the way of removal of dead pathogenic cells from the body. The pain receptors are present in the dermis.

Answer from: Quest

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

Answer from: Quest

Yes yes yes very good

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Sarah and jane were playing basketball. they collided and fell. sarah’s knee was lightly bruised. ja...

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