Distributed Block - View: Magazine: Latest Cover

4/18 Cover

Eureka! Lab

A place for discovery 
Bethany Brookshire

Eureka! Lab

Scientists Say: Hormone

This is a chemical that one part of the body uses to send a message to other body parts

Eureka! Lab
Adult men grow hair on their faces in part because of signals from the hormone testosterone.

Adult men grow hair on their faces in part because of signals from the hormone testosterone.

Mike Mozart/Flickr (CC BY-SA 2.0)

 

Hormone  (noun, “HOR-moan”)

This is a type of chemical that the body uses to send a signal from one body part to another. A hormone might be made in the brain, released into the blood and travel to some distant organ, such as the kidney. At its target, this chemical will usually trigger some effect. The tissues that make hormones are part of the endocrine system. Hormones send signals that help people grow, make use of the energy in food, produce sweat and so much more.

In a sentence

When we feel threatened, our bodies release the stress hormone cortisol, which makes our heart pound and our palms sweat.

Follow Eureka! Lab on Twitter

Power Words

(for more about Power Words, click here)

cortisol   A stress hormone that helps release glucose into the blood in preparation for the fight or flight response.

endocrine system  The hormones (chemicals secreted by the body) and the tissues in which they turn on (or off) cellular action. Medical doctors who study the role of hormones in health and disease are known as endocrinologists. So are the biologists who study hormone systems in non-human animals.

hormone   (in zoology and medicine)  A chemical produced in a gland and then carried in the bloodstream to another part of the body. Hormones control many important body activities, such as growth. Hormones act by triggering or regulating chemical reactions in the body. (in botany) A chemical that serves as a signaling compound that tells cells of a plant when and how to develop, or when to grow old and die.

testosterone  Although known as male sex hormone, females make this reproductive hormone as well (generally in smaller quantities). It gets its name from a combination of testis (the primary organ that makes it in males) and sterol, a term for some hormones. High concentrations of this hormone contribute to the greater size, musculature and aggressiveness typical of the males in many species (including humans).

Readability Score: 
By Bethany Brookshire 7:00am, April 14, 2015
This is no normal subway map. It shows the types of microscopic organisms found at each New York City station.
We are surrounded by bacteria, fungi and other tiny organisms. Now, high school scientists have contributed to the first map of microbes in the New York subway system.
By Bethany Brookshire 8:00am, April 13, 2015
face wash
Bits of plastic smaller than five millimeters are called microplastics. They can end up in the ocean, where corals might mistake them for food.
By Bethany Brookshire 11:19am, April 8, 2015
Math is more than studying. A new festival brings out the fun.
Math is important to everything from our computers to the magic in movies. Now there’s a national festival to show the fun side of numbers.
By Bethany Brookshire 8:00am, April 6, 2015
nematode
Nematodes are a group of related small worms found all over the world. They can cause disease, but they also can be useful for scientists to study.
By Bethany Brookshire 8:00am, April 3, 2015
paper clips
A famous TV show featured an engineering hero. Now, a contest plans to bring engineering back to the screen, and needs your ideas.
By Bethany Brookshire 8:00am, April 2, 2015
pretty bird
When male birds are brightly colored, we assume that’s because their plumage attracts the gals. But a new study with thousands of museum specimens shows that sometimes survival is just as important a factor behind bird color.
By Bethany Brookshire 12:13pm, March 30, 2015
snowy owl
Sometimes populations of animals can suddenly increase. The word for that is irruption.
By Bethany Brookshire 10:58am, March 26, 2015
Cookie science
Making delicious gluten-free cookies requires testing. And this means baking a lot of cookies with scientific precision.
By Bethany Brookshire 8:00am, March 24, 2015
carrot gall
When plants are attacked by predatory worms, often they don’t fight back. A teen studied why and used those findings to help the plants defend themselves.
By Bethany Brookshire 9:00am, March 23, 2015
fulgurites
When lightning strikes in the right place, it can fuse minerals together in a glassy structure.
Subscribe to RSS - Eureka! Lab

From the SSP Newsroom

Science News

Loading...

Science News for Students

Loading...

Eureka! Lab

Loading...