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zhenek [66]
3 years ago
10

Which of the following is the BEST way for Ron to prevent injuries when he rides his skateboard?

Health
2 answers:
Orlov [11]3 years ago
5 0
Number 1 is the correct answer
dlinn [17]3 years ago
4 0

Answer:

1

Explanation:

that is most logical

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Sometimes when a group has a desire to express their anger, it may be done through a prejudice that places the blame and respons
elixir [45]
C....................................
4 0
3 years ago
The activation of beta2 receptors in the bronchi causes bronchodilation (an increase in diameter of the bronchi), making it easi
ss7ja [257]

Answer:

A. epinephrine

Explanation:

Bronchial constriction usually involves the tightening of the smooth muscles which surrounds the tube-like  bronchial airways. This occurs via extra mucus production, spasming of smooth muscles, or swelling/inflammation of layers within bronchi or bronchioles. Bronchial constriction typically results in symptoms of wheezing, coughing and shortness of breath.

This can be treated via the use of the hormone epinephrine, a bronchiodilator. For some cases like asthma, epinephrine in small aerosolized (inhaled) doses can lead to the <em>temporary</em> relief of symptoms. Epinephrine acts by  making bronchial tubes wider to allow the passage of air.

In the body, smooth muscle cells in the veins, arteries and heart are under the control of epinephrine receptors called β2 receptors. Epinephrine binding to the receptor triggers a cell signalling cascade that activates β2 receptors to dilate smooth muscle in the lungs.

Here's how-

  • Calcium is essential to mediating muscle cell signalling and thus contraction
  • in the lungs, epinepherine-β2 receptor binding leads to enzyme activation (adenylyl cyclase)
  • conversion of the energy molecule ATP to the secondary messenger molecule cyclic AMP.
  • cAMP inhibits the activity of the enzyme <em>myosin light chain kinase </em>(MLCK) in smooth muscle
  • ∴ the enzyme remains inactive and the muscles relax

<em>Summary:</em><em> epinephrine → muscle relaxation →</em><em> bronchial dilation (reduced diameter) </em><em>→  decreased respiratory distress → easier breathing.</em>

5 0
3 years ago
What muscles does running work? I have started to run on the treadmill whenever I go to the gym. What muscles does running stren
Sonja [21]
They work out your legs

5 0
3 years ago
3. The penalties for purchasing or possessing alcoholic beverages if you're under age 21 are:
kirza4 [7]

Answer:

It can lead to 60 years in prison and your driver license suspended up to 1 year.

Explanation:

ITS THE LAW ‍♀️

6 0
2 years ago
pick one type of cancer. Describe the system(s) it affects, and what medications are used to treat it.
Alenkinab [10]
Breast cancer

effects

-breast
*if it spreads*
-lymph nodes
-bones
-lungs
-liver

treatments
-chemo
-radiation
-surgery
6 0
3 years ago
Read 2 more answers
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