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Leviafan [203]
3 years ago
7

Why does the heart automatically adjust the flow of blood to match activity levels?

Health
2 answers:
vodomira [7]3 years ago
6 0
D. Organs and muscles require more blood under stress.

A is incorrect because blood cells don't get damaged due to activity.
B is incorrect because it is not the heart that needs oxygen; it's the body cells that are being worked, such as muscle cells in you're arm when you're lifting weights.
C is incorrect because the flow of blood doesn't change the level of oxygen in the blood; breathing does.
andreyandreev [35.5K]3 years ago
4 0
D. Organs and muscles require more blood under stretch.
Just think about it, when you go on a run or do something physical your blood levels increase. Exercising is all about getting your pulse up, because that's how you measure intensity. 
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Answer:

pregnancy, STIs (such as herpes , chlamydia, genital warts), HIV

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What are the possible negative outcomes from Jack's decisions? Check all that apply. tetanus nerve damage hearing loss allergic
Ira Lisetskai [31]

On the bus on the way to school, Angelique's friend Jack shows her his new ear piercing. When she asks him where he had it done, he says his friend Georgia did it for him at her house. Jack says she did piercings on a few of their friends over the weekend using a safety pin.

What are the possible negative outcomes from Jack's decisions? Check all that apply.

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The use of a safety pin for piercing can cause body wounds which, if not appropriately treated, can lead to tetanus.

Similarly, using a safety pin for body piercing by unprofessional can affect the body nerves and ultimately lead to nerve damage and allergic reaction.

Also, both piercing has been connected to HBV and HCV, which are Hepatitis B Virus and Hepatitis C Virus, especially those not done correctly.

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1. tetanus

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4. hepatitis

8 0
3 years ago
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