Lecture Chapter 1 Flashcards Preview

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Flashcards in Lecture Chapter 1 Deck (14):
1

adaptation

a trait that improves the survival and or fitness of organisms that express a trait compared to alternative traits and especially to the ancestral condition in the population from which the adaptation evolved. natural selection is the only mechanism known to cause the evolution of adaptations

2

afferent

moving towards a particular structure often the CNS could be action potential or blood flow

3

amino acid

molecule or monomer of a protein, consist of one or more chains of amino acids, the sequence of the amino acid chain causes the protein to fold into a shape that is physiologically active. the amino acid sequence of proteins are encoded in the genes

4

bipedalism

walking upright with two feet (humans birds and apes walk bipedally) (humans birds cockroaches lizards run bipedally)

5

desiccation

the state or process of extreme drying due to the removal of water from the environment or organism

6

DNA

carries genetic instructions, consists of two strands that wind around eachother to make a double helix

7

effector

cells, tissue, orgains carrying out the changes necessary the CNS to maintain homeostasis (glands and muscle)

8

efferent

moving away from a region often the CNS

9

etiology

the cause or root of a disease

10

evolution

descent with modification , evolution explain how all life on earth shares a common ancestor

11

feedback

flow of info along a closed loop could be neg or pos, involves regulated variable, a sensor, the CNS/hypothalms, an effector

12

feedforward

open loop, predicts change and acts before it happens

13

genotype

collection of genes, DNA

14

phenotype

expression of the genotype contributes to individuals observable traits

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