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Flashcards in Terms Deck (17)
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1
Q

Homologous structure

A

Similar and structure was present in the last common ancestor. Ex - legs in cats and humans

2
Q

Analogous structure

A

Similar but derived independently since their last common ancestor did not possess that structure. Ex - wings on bats and insects

3
Q

Define white matter

A

collection of CNS axons

4
Q

Define nerve

A

Bundle of axons in PNS

5
Q

Define tract

A

Collection of CNS axons that have a common site of origin and destination

6
Q

Define bundle

A

collection of axons that run together but do not have a common site of origin and destination

7
Q

Define commissure

A

Any collection of axons that cross from one side to the other

8
Q

Lemniscus

A

A tract that meanders through the brain like a ribbon

9
Q

Orthologues

A

A species & the genotype with a duplicated gene

10
Q

Paralogues

A

Orthologues that have evolved a new function

11
Q

Term for large cells

A

Magnocellular

12
Q

Term for small cells

A

Parvocellular

13
Q

Term for tiny cells

A

Coneocellular

14
Q

Loss of coordination resulting in the inability to hit a target is called

A

Ataxia

15
Q

Le Gros Clark thought

A

you could use animals alive today to represent steps of evolution

16
Q

3 evolutionary principles

A
  1. isn’t a branching tree
  2. isn’t human directed
  3. isn’t about progress, about diversification
17
Q

What does GABA stand for

A

Gamma-Aminobutyric acid