Q 01/05

When body fat is burned off, most of its mass leaves the human body as which substance?

A) Sweat and urine

B) Carbon dioxide

C) Solid waste

D) Lactic acid

Answer · why

B) Carbon dioxide

Carbon dioxide carries off about 84 percent of lost fat, breathed out through the lungs. Physicist Ruben Meerman worked out that the remainder leaves ...

Q 02/05

The 10,000-steps-a-day target began as the name of a 1960s pedometer sold in which country?

A) Japan

B) Sweden

C) South Korea

D) United States

Answer · why

A) Japan

Japan got the manpokei, or 'ten-thousand step-meter', from the clockmaker Yamasa. A Tokyo clinic chief had urged everyone to walk that far each day, a...

Q 03/05

The ketogenic diet was devised by doctors in the 1920s to treat which medical condition in children?

A) Diphtheria

B) Rickets

C) Epilepsy

D) Asthma

Answer · why

C) Epilepsy

Epilepsy in children was the target, and the Mayo Clinic's Russell Wilder coined the term ketogenic diet. It fell out of favour once effective anticon...

Q 04/05

The GLP-1 diabetes drug exenatide is a synthetic copy of a compound found in the venom of which reptile?

A) King cobra

B) Komodo dragon

C) Rattlesnake

D) Gila monster

Answer · why

D) Gila monster

The Gila monster gets by on a handful of large meals a year, which drew one researcher to its venom. Exendin-4, isolated from it in 1992, was turned i...

Q 05/05

Which talk show host wheeled a wagon holding 67 pounds of fat on stage in 1988 to mark her weight loss?

A) Sally Jessy Raphael

B) Joan Rivers

C) Kathie Lee Gifford

D) Oprah Winfrey

Answer · why

D) Oprah Winfrey

Oprah Winfrey had dropped from 212 to 145 pounds on the Optifast diet and showed off a pair of size 10 jeans. She regained much of the weight after go...