Medical
What organ pumps blood throughout the body?
The heart
How many times should you brush your teeth each day and for how long each time?
Twice a day for two minutes each time.
What hormone is known as the “stress hormone”?
Cortisol
How many hours of sleep are recommended for most adults each night?
7–9 hours
Which vitamin is produced when your skin is exposed to sunlight?
Vitamin D
How man bones are in the human body?
206
What is the soft, sticky film that builds up on teeth and can lead to cavities?
Plaque
What chemical in the brain is most linked to feelings of happiness and mood?
Serotonin
What nutrient is the main source of energy for the human body?
Carbohydrates
What is the largest organ in the human body?
Skin
What part of the blood helps it to clot after an injury?
Platelets
What dental specialty focuses on the health of the gums and supporting bone?
Periodontics
What part of the brain regulates emotions like fear and anger?
Amygdala
What hormone regulates the body’s circadian rhythm and sleep cycle?
Melatonin
What is the hardest substance in the human body?
Enamel
What structure connects muscles to bones?
Tendons
What dental procedure removes infected pulp tissue from inside the tooth?
Root canal
What mental disorder is characterized by alternating periods of depression and mania?
Bipolar disorder
What is the term for the measure of body fat based on height and weight?
Body Mass Index (BMI)
What is the rare blood type known as the “universal plasma donor”?
AB
What is the term for the structure that equalizes air pressure between the middle ear and throat?
Eustachian tube
What layer of the tooth lies beneath the enamel and makes up most of the tooth’s structure?
Dentin
What part of the brain is responsible for forming and storing new memories?
Hippocampus
What term describes the minimum energy required to maintain vital body functions at rest?
Basal metabolic rate (BMR)
What is the body’s main buffer system that maintains blood pH?
The bicarbonate (H₂CO₃/HCO₃⁻) buffer system