How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask xarqi Your Own Question

xarqi, Generalist
Category: Homework
Satisfied Customers: 596
Type Your Homework Question Here...
xarqi is online now
A new question is answered every 9 seconds

biology help

This answer was rated:

The respiratory system:

1. Describe the anatomy of the lungs by following the path of oxygen molecule from the trachea to the alveoli. Also describe the gross anatomy of the lungs including lobes and the serous membrane that surrounds the lungs. Describe the medical disorders that can occur when fluids enter the pleural cavity.

2. Describe the mechanism for pulmonary ventilation. Which muscles are involved in quiet breathing? which muscles are involved in forced breathing?

3. Distinguish between external and internal respiration? Describe the differences in O2 and C02 concentrations for each type of respiration?

4. what are the components of the nervous system that regulate breathing and how do they work? What are the different receptors that regulate breathing and how do they work?

I having trouble answering this question. Please help. Please answer the questions straight to the point. I would really really apreciate it so much!


You need to spend $3 to view this post. Add Funds to your account and buy credits.
xarqi, Generalist
Category: Homework
Satisfied Customers: 596
xarqi and 2 other Homework Specialists are ready to help you
Customer: replied 11 years ago.
Reply to xarqi's Post: the respiratory system part the link will not open. it keep saying this page cannot be displayed
Weird - it works for me. I'll grab the text and post it for now,
but keep trying.
Oxygen-laden air is inhaled into the alveoli of the lungs
by way of the structures illustrated in fig. 5. Blood within the
pulmonary artery is oxygen-poor and contains a large
concentration of carbon dioxide. As blood passes through the
capillaries surrounding the alveoli, oxygen diffuses into blood
and carbon dioxide diffuses out of blood into the alveoli.
Thereafter, carbon dioxide is exhaled by moving from the alveoli
to the nose. Since the blood within the pulmonary vein is
oxygen-rich and contains a small concentration of carbon
dioxide, it is clear that carbon dioxide has been traded for
oxygen as blood passes through the lungs.
The respiratory center, located in the medulla oblongata
automatically discharges nerve impulses to the diaphragm and
the muscles of the rib cage. In its relaxed state, the diaphragm
is dome-shaped, but upon stimulation, it contracts and lowers.
Also the rib cage moves upward and outward. As the thoracic
cavity increases in size, air pressure within the expanded lungs
lowers and is immediately rebalanced by air rushing in through
the nose. This is why it can be said that humans breathe by
negative pressure. When the respiratory center stops sending
out stimulatory nerve impulses the diaphragm and rib cage
resume their original positions and exhalation occurs.

There are chemoreceptors adjacent to the respiratory center in
the medulla oblongata that are sensitive to the carbon dioxide
content of the blood, and chemoreceptors in aorta and carotid
arteries that are sensitive to both the carbon dioxide content
and the pH of the blood. When the carbon dioxide concentration
rises or when the pH lowers the respiratory center is stimulated
and the breathing rate increases. It is interesting to observe that
the oxygen content of the blood does not directly affect the
activity of the respiratory center.

Customer: replied 11 years ago.
Reply to xarqi's Post: this answer goes to what question iam confused. when you typed oxygen-laden air is inhaled into the alveoli......
This is the text from the site you couldn't access. It relates to
the nervous system control of respiration, and the primary
sensors involved, particularly those in the aorta and carotids.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Previous | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

Meet The Experts:

  • LogicPro



    Satisfied Customers:

    Expert in Java C++ C C# VB Javascript Design SQL HTML
< Last | Next >
  • LogicPro's Avatar



    Satisfied Customers:

    Expert in Java C++ C C# VB Javascript Design SQL HTML
  • Manal Elkhoshkhany's Avatar

    Manal Elkhoshkhany


    Satisfied Customers:

    More than 5000 online tutoring sessions.
  • Linda_us's Avatar


    Finance, Accounts & Homework Tutor

    Satisfied Customers:

    Post Graduate Diploma in Management (MBA)
  • Chris M.'s Avatar

    Chris M.

    M.S.W. Social Work

    Satisfied Customers:

    Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
  • F. Naz's Avatar

    F. Naz

    Chartered Accountant

    Satisfied Customers:

    Experience with chartered accountancy
  • Bizhelp's Avatar



    Satisfied Customers:

    Bachelors Degree and CPA with Accounting work experience
  • Seanna's Avatar



    Satisfied Customers:

    3,000+ satisfied customers, all topics, A+ work

Related Homework Questions