Control and Coordination. The Senses. Light rays, sound waves, heat, chemicals or pressure in your environment stimulate your sense organs. Five senses:
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a. Outer ear - gathers sound waves
b. Middle ear – eardrum vibrates and stimulates (hammer, anvil, stirrup)
c. Inner ear –fluids in
the cochlea vibrate and
send impulse to brain
Molecules in air stimulate nerve cells - olfactory cells in nasal passages and taste buds on tongue
The Nervous System
Has three parts:
- Cell body (C) – contains nucleus
- Dendrites (B) – carries impulse toward cell body
- Axon (A) – carries impulse away from cell body
- Nerve cells do not touch
Peripheral nervous system (PNS) – nerves branch from CNS (brain/spinal cord) to body
I cdnuolt blveiee that I cluod aulaclty uesdnatnrd what I was rdanieg. The phaonmneal pweor of the huamn mnid, aoccdrnig to rscheearch at Cmabridge Uinervtisy, is it deosn’t mttaer in what order the ltteers in a word are, the only iprmoatnt thing is that the frist and lsat ltteer be in the rghit pclae. The rset can be a taotl mses and you can still raed it wouthit a porbelm. This is bcuseae the haumn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe. Amzanig huh? Yaeh and I awlyas tghuhot slpeling was ipmorantt!!
1. Why is it that the human brain is able to read the above passage?
2. What do you think the above passage says about the importance of spelling words correctly for human understanding?
3. Do you think your language arts teachers would be swayed into believing that spelling is unnecessary in their class? Why or why not?
Purpose: To determine reaction time by measuring how long you take to catch a falling ruler.
Procedure: During two separate tests, you will catch a falling ruler released by your classmate using your thumb and forefinger. In one test, you will focus on catching the ruler. In the other, you will be distracted with doing multiplication in your head while trying to catch the ruler.
Hypothesis: Will your reaction time be faster during normal conditions or distracted conditions?Why? ___________