1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jasenka [17]
2 years ago
15

Name 2 natural sources of water​

Health
2 answers:
professor190 [17]2 years ago
4 0
Rain water, underground water and surface water.
tester [92]2 years ago
4 0

Answer: surface water and groundwater

Explanation: surface water (lakes, oceans and rivers), and groundwater because it lies underneath the surface of the land, where it can then travel through openings in rocks.

You might be interested in
Although little albert was classically conditioned to fear a rat, he also began to fear dogs, rabbits, and a santa claus mask. t
Angelina_Jolie [31]
Zoophobia and Automatonophobia.
4 0
3 years ago
Read 2 more answers
What is the body's first line of defense against bacteria and viruses?
Rashid [163]
The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils. Hope this helps.
5 0
3 years ago
According to MyPlate, which two food groups should you consume in the largest amounts?
Ainat [17]
Vegetables and grains is the correct answer
5 0
3 years ago
When a person on a skateboard decides to perform a short, hard Ollie, that would be considered muscular endurance. True False
hram777 [196]

False. Short spurts are never muscular endurance.

5 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
Other questions:
  • Which of these technology tools would best help a family reduce the spread of germs and bacteria at home?
    12·2 answers
  • In getting which factor is not critical when beginning an exercise program
    14·1 answer
  • Synovial fluid is a ________ substance.
    14·1 answer
  • If an outdoor runner develops a headache feels tired and has an avated heart rate, what is the most probable cause ?
    5·1 answer
  • Which of these emotions was easiest to interpret?
    13·2 answers
  • What is the reason for most outgoing calls?
    9·2 answers
  • Down’s syndrome is one organic cause of mental re ta rdation.<br> T/F
    12·2 answers
  • how is skill-related fitness related to personal safety and personal wellbeing? I need real answers please help me
    13·1 answer
  • A criticism of duty based ethics is ______________.
    8·1 answer
  • Can someone please tell me the history of Impetigo?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!