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Flashcards in homeostasis and cell function Deck (18):
1

define homeostasis

refers to the maintenance of nearly constant conditions in the internal environment (condition in which the body's internal environment remains relatively constant within limits

2

what factors need to be true for an organism to be in homeostasis

contains the optimum concentrations of gases, nutrients, ions, and water
has an optimal temperature
has an optimal pressure for the health of the cells

3

define stress

any stimulus that creates an imbalance in the internal environment

4

define feedback system

circular situation in which the information about the status of something is continually reported to a central control region

5

define gain

degree of effectiveness with which a control system maintains constant conditions

6

which of the following would have to be a transmembrane protein?
receptor protein, protein binding to the cytoskeleton, channel protein, phosphorylase

a channel protein

7

define unit membrane

phospholipid bilayer with cholesterol inserted among the phospholipids

8

define integral proteins

either inserted into the membrane on one side or the other or pass all thew ay through and are exposed on either side of the membrane (removing them would destroy the phospholipid bilayer)

9

define peripheral proteins

loosely attached to one surface of the membrane or the other and are easily removed

10

which organelles are associated with intracellular trafficking

smooth and rough ER
golgi apparatus

11

which organelles are associated with most ATP production

glycolysis: cytoplasm
ETC and Krebs: mitochondria

12

what does all protein synthesis begin with

free ribosome

13

which of the following organelles is directly associated with the synthesis of proteins for secretion

Rough ER

14

pits coated with _______ are often associated with endocytosis

clathrin

15

what does smooth ER do

storage organelle
important in creation and storage of lipids and steriods

16

what does rough ER do

secretion of ribosomes
forms lysosomes

17

what does the golgi apparatus do

plays role in packaging proteins for secretion
forms lysosomes
modifies proteins from the Rough ER

18

define physiology

study of the functional organization of the human body