When she plays football, she uses more energy than usual.
Some of her body systems work faster than normal.
Task:
Describe what happens to her circulation system and her breathing
system when she plays football. Explain why these changes happen.
Draw diagrams to help explain your ideas.
Keywords to include: respiration, heart, lungs, oxygen, carbon dioxide,
alveoli, inhalation, exhalation, diffusion, red blood cells (13 marks)
Answer:
Firstly, when we exercise, or do some activity (in this case football), we use more energy than usual...
The reason some of her body systems work faster than normal, is to keep the body working and in the equilibrium, so that she won’t get tired too fast.
Related to circulation, her blood flow increases, since she needs more oxygen to reach the muscles faster, due to the exercise/activity (Lactic acid builds up, so more oxygen is required.)
Her breathing increases to take in more oxygen(O2), and give out more carbon dioxide(CO2).
Her body respires more(respiration), both aerobically(with oxygen), and anaerobically(without oxygen), lactic acid builds up due to anaerobic respiration.
(Here, energy is released from glucose to generate a substance called lactic acid. ... Therefore anaerobic respiration cannot be used for a prolonged period of time without having damaging effects on a cell.)
When she inhales (Oxygen), it goes to the lungs, to the alveoli ( Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going)
In the Alveoli, diffusion takes place, this is where oxygen is diffused into the blood, and carbon dioxide is diffused (taken into) into the lungs.
Then we exhale, which gives out the carbon dioxide(CO2), this happens really fast, we also breathe so fast, this process happens within seconds.
Red blood cells contain something called haemoglobin, this combines with oxygen To form oxyhaemoglobin, then when the red blood cell reaches the muscle, it gives the oxygen, converting oxyhaemoglobin back to haemoglobin.
Heart: pumps blood faster (as I said before), to ensure oxygen gets distributed faster to where it’s needed
Answer:
The correct answer or fill in would be- but Change and evolve over time.
Explanation:
The perfect cosmological principle is a extended version of the cosmological principle. The perfect cosmological principle says that the universe is look same from all directions but can be change and evolve with time.
Steady state theory supports this theory as it also says that universe is expanding but also maintain its density even though it continuously creates stars and galaxies but still look same.
Thus, the correct answer is -but Change and evolve over time.
Competition
Mutualism
Parasitism
Predation
ANSWER FAST PLEASE
Answer:
Commensalism
Explanation:
This is where one animal benefits and the other isn't benefited or harmed. The egrets get food, and the cattle continue their daily lives.
descent with modification
descent with differential reproduction
survival of the fittest
Answer:
Descent with modification
Explanation:
Darwin proposed the phrase "descent with modification" to explain that evolution of new species occurs when existing species accumulate genetic variation over the period of time.
Accordingly, the process of accumulation of genetic variations to get better adapted to the surroundings is followed by natural selection of individuals with beneficial adaptations that impact survival advantage to them. These individuals transmit the adaptations to their progeny.
Gradually, the process leads to the evolution of new species which differ from parental species in having the individuals carrying the beneficial adaptations.