(Solved) The 2000-meter Row: A Case in Homeostasis (case study)

big-e_7

wrote...

Go to Answer

Posts: 41

Rep:

11 years ago

The 2000-meter Row: A Case in Homeostasis (case study)

Can anyone help me with this case study? i have attached the case study story to this message...thank you for anyone willing to help me! I need it by Wed 4-25-12 at 5:00 pm

At the start
1.) What is responsible for raising Jim's heart and respiratory rate and stimulating sweating just before the race?

2.) Why is the sympathetic division of the autonomic nervous system active just before the race?

3.) What changes do you think are occurring in the digestive and urinary systems at this time?

4.) What is happening to Jim's blood glucose levels just before the race?

5.) Why is Jim's mouth dry?

One minute in
1.) Rowing full speed is putting new demands on Jim's body. What are these new demands and how does the body respond to them?

2.) What changes in Jim's muscles promote unloading of O2 from hemoglobin for use by the muscle cells?

3.) Why do Jim's muscles feel like they are burning?

4.) What conflict is produced between Jim's need to keep his body cool and his need to remove nitrogenous wastes from his blood? What did he do before the race to help alleviate this conflict?

Attached file

crew.pdf (107.51 KB)

You must login or register to gain access to this attachment.

Read 36058 times

55 Replies

Report

Replies

Answer accepted by topic starter

lewis

wrote...

Valued Member

Related Topics

lewis

wrote...

Valued Member

11 years ago

#1. Rowing full speed is putting new demands on Jim's body. What are these new demands and how does the body respond to them?

Now that Jim is at full speed he has put new demands on his body which cause his heart rate to jump from 65bmp to 201bmp and his temperatue has also rose to 99.5 but after two minutes of intense activity his heart rate is now at 180 and his temperature is at 100. Jims body has slowed down and was giving 80% body effort while ignoring the pain.

#2. What changes in Jim's muscles promote unloading of O2 from hemoglobin for use by the muscles cells?

When Jim's muscels and cells are feeling the burning sensation this is caused by the O2 from hemoglobin when these cells are being used excessivly. He used up his hemoglobin by vigorously rowing the boat up to its maximum speed. This causes the the muscles to use his oxygen within the cells so the body could maintain homeostasis.

#3. why do Jim's muscles feel like they are burning?

The reason that Jim's muscles are feeling the burning sensation is beacuse they are experiecing sensory info. from his nervous system. This feeling is due to the increase of activity and fatigue occuring because he over exerted his body. Also his body has been using his glycogen within the cells which make lactic acid which causes the burn jim is experiencing.

#4. What conflict is produced between Jim's need to keep his body cool and his need to remove nitrogenous wastes from his blood? What did he do before the race to help alleviate this conflict?

The conflict between keeping his body cool and his need to remove nitrogenous wastes is hydration vs. dehydation. Jim tried to make the conflict easier before the race when he made sure he was well hydrated and stayed calm and relaxed which help to keep his heart rate and respitory rate low.

3 Votes

Reaper, Peter Buellesbach, Shelmith

Report

big-e_7 Author

wrote...

11 years ago

THANK YOU.... THANK YOU.... THANK YOU.... THANK YOU.... THANK YOU....
your a life saver! Grinning Face

Report

lewis

wrote...

Valued Member

11 years ago

Quote from: big-e_7 (11 years ago)

THANK YOU.... THANK YOU.... THANK YOU.... THANK YOU.... THANK YOU....
your a life saver! Grinning Face

Let me know if you need anything else.

1 Vote

aprilsolin

Report

kapsara

wrote...

11 years ago

Can you please finish the rest of the questions on the case study At the halfway mark, at the finish and back at the dock

Report

lewis

wrote...

Valued Member

11 years ago

Quote from: kapsara (11 years ago)

Can you please finish the rest of the questions on the case study At the halfway mark, at the finish and back at the dock

Post the question

Report

wrote...

11 years ago Edited: 11 years ago, jr

Ok here is the rest of the questions, any help will be appreciated.
THANK YOU.

At the finish

11. Jim has stopped rowing and his muscles are now at rest. Why are his heart and breathing rates still so high?

12. What is the function of sweating, and why is he sweating more now than during the race?

13. What changes have occurred to his blood chemistry since the start of the race, and why? Think about glucose levels, pH, lactate levels, creatinine levels, and temperature.

Back at the dock

14. What changes have occurred in the last 10 minutes to allow Jim's heart and respiratory rates to come down?

15. Why is Jim four pounds lighter than at the start of the race? What effects do you think this had on his endocrine system and urinary system?

16. Why did Jim only take sips of water after the race? What could happen if he drank as much as he wanted to?

17. Would Jim be concerned about getting a cold or flu after this intense exercise? Explain.

1 Vote

Shaquandre Williams

Report

wrote...

11 years ago

Ok, and also these questions from the same case study:
At the start
1. What affects will this have on the body organ systems (describe them specifically)?

One minute in

4. What would be the main function of Jim’s skeletal system, while he is rowing?

5. Jim’s glucose level in his muscles may be getting depleted, during this time. Why would it be depleted, and what is it specifically being used for? What are the different ways the body is able to obtain more glucose?

7. What do the muscles use the O2 for? What stage of cellular respiration directly uses O2?

8. Explain in detail, and explain the process why Jim's muscles feel like they are burning?

9. Jim’s muscles are burning, how is that affecting his acid/base balance? In what ways would the body be compensating for this?

THANK YOU.

1 Vote

Kostyantyn Piunov

Report

lewis

wrote...

Valued Member

11 years ago

At the Finish Line:

#1. Jim has stopped rowing and his muscles are now at rest. Why are his heart and breathing rates still so high?
When Jim pushed his body to do alot of work, it was just returning to normal state at the finish line. His breathing was still high because he was still in the recovery period for his body.Oxygen was still needed to meet the heart rate.
#2. Why is he sweating more now than during the race?
Jim is now sweating more because of his high body heart and his body need to sweat to cool so his body will return to normal state.
#3. What changes have occurred to his blood chemistry since the start of the race?
Since Jim's muscles have been working hard there has been an increase of blood flow to them. The activity has caused an reduction in the amount of blood glucose as its changing over to energy. The carbon dioxide level will increase because of the production of glucose.
Back at the Dock:
#1. What changes have occurred in the last ten minutes to allow Jim's heart and respiratory rates to come down?
The reason his heart and respitory rate has came down is because of the positive feedback loop. This loop helps to return the body to original state which cause his rates to decrease.
#2. Why is Jim four pounds lighter than at the start of the race?
The reason Jim is lighter now is because of dehydration. He had rehydrated himself before the race and during the race jims body had many different chemical reactions within his body. Since he had water in his body he sweated more of the water out in his sweat which cause weight loss.
#3.What effect has this water loss had on his endocrine system?
Jim has lost water which caused a loss of sodium which resulted in jim being dehyrated.
#4. why did Jim only take sips of water after the race? what could happen if he drank as much as he wanted to?
Since Jim was dehyrated after the race he could only drink water to help restore the electrolytes into his cells, if he would have not taken little by little he could have muscles cramping. Also the small sips allowed his body to adjust to his body's state of dehydration.

2 Votes

bio_man, jadyn.sexton

Report

wrote...

#10

11 years ago

Can you PLEASE answer the questions for At the half way mark? Here are the two questions:

1) Since the end of the 1st minute, Jim has decreased the demands his muscles are making. How has he done this? And WHY has he done this?

2) What are the changes in his conditions as a result?

2 Votes

Natalie Brown, Francis Sop

Report

sarah!

wrote...

#11

11 years ago

Quote from: SC (11 years ago)

This topic is already solved, please start a new topic.

1 Vote

sacradust

Report

~Live well, laugh often, and love with all of your heart!~

a&p

wrote...

#12

11 years ago

Need help with this question. Recall that Jim could see boats on either side of him. Trace the image of those boats to perception. (Include all focusing, transduction, transmission, and perception processes and structures)

1 Vote

wabo83

Report

Peter B.

wrote...

#13

4 years ago

THANK YOU

Report

12 3 4

New Topic

Home Search Q & A Board Gallery Resource Library Blog Dictionary Chat	Quick Links Start a Topic Latest Topics Unanswered Questions Courses Study Tools Browse by Textbook	Social Facebook YouTube Community Stats Who's Online Trending Staff	Help About Us Take the Tour Study Tips Posting Guidelines Terms and Policies Contact Us
Biology Forums - Study Force © 2010-2024 \| Powered by SMF \| SMF © 2015, Simple Machines \| Sitemap Biology-Forums.com is not affiliated with any publisher. Book covers, title and author names appear for reference only.