energy work sheets Flashcards
(24 cards)
why do people breathe more air when exercising
our muscles need more oxygen to generate energy
why does the body produce carbon dioxide
The body produces carbon dioxide (CO2) as a waste product during a process called respiration
Name 2 features of the alveoli that make them efficient as surfaces for gas exchange?
Two features that make alveoli efficient surfaces for gas exchange are their large surface area and thin walls. The large surface area provides ample space for gas exchange to occur, while the thin walls allow gases to diffuse quickly, facilitating efficient gas exchange between the air and blood
is aerobic respiration a chemical reaction?
yes
what is the word equation for anaerobic respiration in humans
glucose = lactic acid + energy
What is the word equation for anaerobic respiration in microorganisms
glucose = ethanol + carbon dioxide + energy.
Give an example of anaerobic respiration in microorganisms
yeast making bread
what are difference between anaerobic and aerobic respiration?
1.Aerobic respiration occurs with oxygen and releases more energy but more slowly.
2.Anaerobic respiration occurs without oxygen and releases less energy but more quickly.
give 2 reasons the stomach produces alot of acid
- to break down food, especially proteins.
- to kill harmful bacteria
why does the stomach contain muscular tissue?
to help mix and break down food, as well as to move the partially digested food towards the small intestine
in which organ would you expect to find pepsin?
The stomach (pepsin is a type of enzyme that breaks down protein)
what is the enzyme which breaks down carbohydrate
carbohydrase
what does the enzyme carbohydrase create from carbohydrates?
glucose
what is the enzyme that breaks dwon protein?
protease
what does protease create from protein
amino acids
what is the enzyme that breaks down lipids and fats
lipase
what does the enzyme lipase create from lipids and fats
glycerol and fatty acids
give 2 reasons why it’s good to have bacteria in your digestive system
- Bacteria in your gut help break down food
- they make vitamins that help with our immun system
by what method do gases pass into or out of the bloodstream?
Gases move into and out of the bloodstream through a process called diffusion. This happens at the tiny air sacs called alveoli within the lungs
name 2 muscles that control breathing
the diaphragm and the intercostal muscles.
Where does gas pass out of the bloodstream, and what is it used for?
Gases, specifically carbon dioxide, exit the bloodstream and are exhaled through the lungs. This process, called gas exchange, occurs in the alveoli, tiny air sacs within the lungs
the lungs are adapted to allow gases to pass easily in and out of the blood- Give 3 ways which the lungs are well adapted for gas exchange??
- Large Surface Area: The lungs contain millions of tiny air sacs called alveoli, which dramatically increase the surface area available for gas exchange.
- Thin Walls: The walls of the alveoli are only one cell thick, reducing the distance gases need to travel to diffuse across.
- Good Blood Supply: A network of capillaries surrounds the alveoli, ensuring a constant supply of blood to carry away oxygen and bring carbon dioxide
why do you feel tired after vigorous exercise
You feel tired after vigorous exercise because your body’s energy stores are depleted, and waste products like lactic acid build up in your muscles
what is the effect of exercise on your heart rate ?
During exercise, your heart rate (or pulse) increases because your muscles need more oxygen and nutrients to work properly
