We donate 60% of ad revenue towards data for learners who need it the most.
First time here? Checkout the FAQs!
x
Institutions: Global |ALU | TUT | UCT | UJ | UNISA | UZ | Wits

0 votes
70 views
Thabo is training for a race by running 20 km every day. Describe how oxygen is taken into her body and how it moves into her blood stream. Also describe how the carbon dioxide produced in her body during training is controlled to maintain normal levels.

Content:(17 marks)
Synthesis: (3marks)
in Biology by Diamond (41,704 points)
recategorized by | 70 views

1 Answer

0 votes
These are the points expected in your essay, make sure you apply relevant and correct terminology(expect maximum of 6,4 and 7 points, not all of them, respectively in the below sections of your essay):

Inhalation
-The diaphragm contracts
- It becomes less rounded  / flat
- The external intercostal muscles contract
- causing the ribcage to move up- and outwards
- The volume of the chest cavity increases
- The volume of the lungs also increases
- The pressure decreases
- Air flows into the lungs

Gaseous exchange of oxygen in the lungs
- There is a high oxygen concentration in the alveoli
- The blood has a low oxygen concentration
- A concentration gradient is created
- Oxygen will move from the alveoli to the bloodstream
- By the process of diffusion

Homeostatic control of carbon dioxide
- Because of exercise the carbon dioxide levels in the blood will increase
- The medulla oblongata will be stimulated
- to send messages to the heart
- breathing muscles
- the heart beats faster
- blood with carbon dioxide is pumped to the lungs faster to be exhaled
- the breathing muscles contract faster
- and the rate and depth of breathing increases
- more carbon dioxide is removed out of the body
- The carbon dioxide levels decrease back to normal
by Diamond (41,704 points)

Welcome to MathsGee Answers, Africa’s largest free personalized study network that helps people find answers to homework problems and connect with experts for improved outcomes.


*Inspired by Ecosia, MathsGee pledges that 60% of the revenue from the displayed adverts will be used to buy data for South African learners who need it the most.


Enter your email address:

Wellness For Entrepreneurs

Congratulations to our winners!
Posted on Monday March 01, 2021

Congratulations to Lukhanyo Maneli and Terence Molepo for winning copies of the Nuts and Bolts book written by Dr. McLean Sibanda! We cannot wait for you to dig in and join us in the book review...

Click Here To Read More.
 

Episode 23: How to lead, manage strategy, and execute, with Dr. Alex Granger
Posted on Thursday February 25, 2021

Entrepreneurs are often building the plane, cleaning it, and flying it all at once. They must plan and execute their strategies all at the same time. How do they become excellent at leading...

Click Here To Read More.
 

Special Episode: Nuts and Bolts Book Review
Posted on Sunday February 21, 2021

We are doing a book review and you could be a winner! Dr. McLean Sibanda is the author of Nuts and Bolts – a book about strengthening the innovation and entrepreneurship ecosystems of Africa....

Click Here To Read More.
 

Episode 22: How to spot new opportunities, with Kwame Bekoe
Posted on Thursday February 18, 2021

Entrepreneurs discover or create opportunities that ultimately lead to some of our favourite products and solutions to real pressing problems. But how exactly do they spot these opportunities in...

Click Here To Read More.
 

Episode 21: How high growth entrepreneurs think, with Jito Kayumba
Posted on Thursday February 11, 2021

Do you have a high growth mindset? High growth enterprises are rare and their founders have a unique way of thinking. I spoke to Jito Kayumba, a Private Equity investor and partner at Kukula...

Click Here To Read More.
 

|STEM Gender Equality | ZOOM | Slack | eBook