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LUCKY_DIMON [66]
2 years ago
10

How might a scientist use experimental design to investigate the effect of a new medication on an organism that infects humans?

Medicine
1 answer:
devlian [24]2 years ago
7 0

Answer:

by abducting them then experimenting on them like lab rats

Explanation:

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steoporosis and related low bone mass affect many adults in North America, especially older women. One-third of all women experi
tatuchka [14]

Answer: This is TRUE for me. Osteoporosis is a preventable disease.

Explanation:

In this condition, bone density ( the amount of bone tissue) is reduced because it's deposition does not keep pace with resorption. Although the bone is adequately mineralised, it is fragile and microscopically abnormal, with loss of internal structure.

Peak bone mass occurs around 35 years and then gradually declines in both sexes. Lowered oestrogen levels after the menopause are associated with a period of accelerated bone loss in women. Thereafter bone density in women is less than in men for any given age. That is why in North America, one-third of all women experience fractures because of this disease, amounting to about 2 million bone fractures per year.

Common features of osteoporosis are:

--> skeletal deformity: gradual loss of height with age, caused by compression of vertebrae.

--> bone pain

--> fractures: especially of the hip ( neck of femur), wrist and vertebrae.

It is TRUE for me that some risk factors can't be changed ( which is the low oestrogen levels that occur after menopause in women) but others, such as poor calcium intake, can.

Exercise and Calcium intake during childhood and adolescence are important in determining eventual bone mass of an individual and in preventing risk of osteoporosis in later life.

7 0
2 years ago
A box has a mass of 5 kg. What is the weight of the box on Earth? Show your work.
maria [59]

Answer:

mass (m) is 5 kg

acceleration due to gravity (g) is 9.8 or 10 m/s2

weight (w)is ?

w= mg

w=5×10

=50 N

hence weight is 50 N

5 0
2 years ago
A 13-year-old girl and her father have come to emergency department for assessment of the girl's stiff and warm knee. The father
Mazyrski [523]

Answer:He's sick

Explanation:

3 0
3 years ago
Which of the following reactions with covalently closed, circular DNA (cccDNA) does NOT result in a new linking number? A. incub
alisha [4.7K]

Answer:

Okay

Explanation:

Human topoisomerase I plays an important role in removing positive DNA supercoils that accumulate ahead of replication forks. It also is the target for camptothecin-based anticancer drugs that act by increasing levels of topoisomerase I-mediated DNA scission. Evidence suggests that cleavage events most likely to generate permanent genomic damage are those that occur ahead of DNA tracking systems. Therefore, it is important to characterize the ability of topoisomerase I to cleave positively supercoiled DNA. Results confirm that the human enzyme maintains higher levels of cleavage with positively as opposed to negatively supercoiled substrates in the absence or presence of anticancer drugs. Enhanced drug efficacy on positively supercoiled DNA is due primarily to an increase in baseline levels of cleavage. Sites of topoisomerase I-mediated DNA cleavage do not appear to be affected by supercoil geometry. However, rates of ligation are slower with positively supercoiled substrates. Finally, intercalators enhance topoisomerase I-mediated cleavage of negatively supercoiled substrates but not positively supercoiled or linear DNA. We suggest that these compounds act by altering the perceived topological state of the double helix, making underwound DNA appear to be overwound to the enzyme, and propose that these compounds be referred to as ‘topological poisons of topoisomerase I’

8 0
3 years ago
Read 2 more answers
Your sister has evaluated her usual diet by comparing it to the USDA Eating Patterns and has found that her intakes of fruits, v
defon

Answer:

She needs to eat more of these foods and less of others to keep her calories balanced

Explanation:

The listed food which she is said to be having less of in her diet are low have low calories, than other foods carbohydrates, therefore, she needs to obtain more more of these food choices in her diet to complement for the reduction in her current food choices.

Therefore, she should include dairy products, vegetables and fruits more in her diet in order to meet the USDA Eating Patterns.

4 0
3 years ago
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