PSY-B - Psychology PSY-B 320 Chapter Notes - Chapter 1.3,1.4: Color Vision, Neoteny, Chordate
11 Jan 2017
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3. how the human brain evolved its present complexity. 1. animals that first developed a nervous system and muscles with which to move. 2. how the nervous system grew more complex as the brain evolved to mediate complex. Common ancestor- a forebear from which two or more linages or family groups arise. 1. neurons and muscles brain cells and muscles evolved first, allowing animals to move. 2. nerve net- simple nervous system that has no center but consists of neurons that receive se(cid:374)sor(cid:455) i(cid:374)for(cid:373)atio(cid:374) a(cid:374)d (cid:272)o(cid:374)(cid:374)e(cid:272)t dire(cid:272)tl(cid:455) to other (cid:374)euro(cid:374)s that (cid:373)ove (cid:373)us(cid:272)les. 3. bilateral symmetry a body plane where organs or parts present on both sides of the body are mirror images. 4. segmentation- division into a number of parts that are similar, refers to the idea that many animals are composed of similarly organized body segments. The human brain and spinal cord, as well as the vertebra contain segmentation. 5. ganglia collection of nerve cells that function somewhat like a brain.
