Digestive System
Food can be broken down in two ways: mechanical digestion and _________ ________
Name the four chambers of the heart.
Right atrium, right ventricle, left atrium, left ventricle
What is the primary organ of the respiratory system?
Lungs
Carbohydrates get broken down into __________
glucose (sugar)
True or False: Complex carbohydrates, like starches and fibers, provide longer-lasting energy because your body has to break them apart before it can use them.
True
Where does digestion end?
Small intestine
What carries blood away from the heart?
Arteries
The function of the respiratory system is to supply our body with oxygen and remove ________ ________
carbon dioxide
Does heart rate increase or decrease during exercise?
Increase (because your working muscles need more oxygen)
Our bodies use ________ to rebuild and grow cells. It can be found in meat, eggs, beans, peas, nuts, and dairy products.
Protein
______ is a yellowish-green digestive fluid made by the liver, stored in the gallbladder, and released into the small intestine
Bile
These blood cells help our bodies fight infections
White blood cells
The mechanical process of taking in air is called...
Breathing
Which body systems work together to provide cells with oxygen and remove carbon dioxide?
Circulatory System and Respiratory System
The ability of a living organism to maintain a stable, balanced internal environment is called...
Homeostasis
Most reabsorption of water occurs in what organ in the digestive system?
Large intestine
What carries deoxygenated blood back to the heart?
Veins
Why is it harder to breath at high altitudes?
The air is thinner and our body struggles to adjust to lower oxygen levels
Blood is made up of four different materials: plasma, red blood cells, white blood cells, and ...
Platelets
An example of homeostasis failing in the human body is the inability to control blood sugar levels. What condition is this called?
Diabetes
How does the insulin-glucagon feedback loop work?
When sugar is too high, insulin is released to lower it. When sugar is too low, glucagon is released to raise it.
Red blood cells carry what gas?
Oxygen
Cellular respiration uses what gas to break down glucose into energy we can use?
Oxygen
__________ speed up the rate of chemical reactions in the body
Enzymes
Use the concept of homeostasis and feedback mechanisms to describe how we regulate body temperature.
When we get hot, it causes us to sweat. When we get cold, it causes us to shiver. This helps us maintain a stable body temperature.