http://www.ck12.org Chapter 1. Human Biology
without involving the brain.- touch: Sense of pain, pressure, or temperature.
Summary
- Sensory neurons in the skin sense pain, pressure, and temperature.
- When sensory messages only travel as far as the spinal cord, and skip the brain, this is called a reflex arc.
Practice
Use the resources below to answer the questions that follow.
- Human Sensesat http://www.youtube.com/watch?v=Ajw_WJYxAAI (1:05)
MEDIA
Click image to the left for more content.- Where do we have touch sensors?
- How do they communicate with the brain?
- The Sensory Cortex and Touchat http://www.youtube.com/watch?v=IC3YTJNu0Ec (1:08)
MEDIA
Click image to the left for more content.- Where is the sensory cortex located?
- What are the "end bulbs of Krause" believed to sense?
- What do Merkel’s disks respond to?
- What sensors are located in the dermis?
Review
- Imagine you touch a smooth stone. How is this sensation transmitted to your brain?
- How and why do reflex arcs occur?