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Why is Rudolp's nose red?

Stressed Out

Feeling stressed out? Wonder what stress is or how to best to deal with stress? Then you might like to listen in as Dr. Biology talks with Miles Orchinik, Associate Professor in the School of Life Sciences at Arizona State University, about his work on stress.

Content Info | Transcript


MP3 download | 15MB

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Topic Time
What is stress? (stressors and stress responses). 01:18
What effect does stress have on the body? 02:27
Neurons (brain cells) Hormones (chemical messengers). 02:45
Cortisol (hormone) also known as hydrocortisone. 03:20
What happens when you have too much stress? 05:07
Things you might experience with too much stress. 06:45
Genes and DNA. 07:33
Does stress affect DNA? 07:48
Hypothalamus and the hippocampus - where are they and what do they do? 08:46
Hippocampus - learning and memory. 09:49
Hypothalamus controls the start and stop of hormone cascades and primitive activities. 09:58
Do the hypothalamus and hippocampus work together? 10:42
Basics about the hypothalamus and hippocampus - size and location. 11:12
Can we control unwanted stress? 12:24
What role does the hippocampus play in learning - the need for sleep. 12:46
After a certain age does the brain only have neurons die and never generate new ones? Adult neurogenesis 14:10
What happens to brain neurons as we age? 16:04
Bull frogs and brains. 17:10
Recording of bull frog call. 18:07
What have we learned from bull frogs? 18:28
Do other animal brains show neurogenesis? 21:08
How do you catch a bull frog? 21:53
Invasive species - food web - story of Guam and brown tree snakes. 24:00
When did you know you wanted to be a biologist or scientist? (unusual answer) 25:15
I bet you had some interesting jobs. 26:34
If you were not a biologist, what would you be? 27:52
What advice do you have for people wanting to become a biologist?
It's okay to make mistakes and avoid specializing.
28:28

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Stressed Out

Audio editor: Charles Kazilek

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Share to Google Classroom

Be part of Ask A Biologist

by volunteering, or simply sending us feedback on the site. Scientists, teachers, writers, illustrators, and translators are all important to the program. If you are interested in helping with the website we have a Volunteer page to get the process started.