Levels of Organization/Maintenance of Life**

Question 1

The branch of science that deals with the structure of body parts, their forms, and how they are organized

Answer 1

anatomy

Question 2

concerns the functions of body parts, what they do and how they do it

Answer 2

physiology

Question 3

microscopic particles

Answer 3

atoms

Question 4

A particle made up of 2 or more atoms

Answer 4

molecules

Question 5

particles formed by molecules combining in a complex way

Answer 5

macromolecules

Question 6

basic unit of structure and function

Answer 6

cell

Question 7

composed of aggregates of macromolecules; carry out certain activities

Answer 7

organelles

Question 8

cells that are organized into layers or other structures that have a common function

Answer 8

tissues

Question 9

complex structures with specialized functions; formed by groups of tissues that interact

Answer 9

organ

Question 10

a group of organs that function closely together

Answer 10

organ system

Question 11

a living thing, organ systems make up this

Answer 11

organism

Question 12

all of the chemical reactions in cells that break down or build up substances

Answer 12

metabolism

Question 13

the condition of a stable internal environment

Answer 13

homeostasis

Question 14

the fluid surrounding body cells

Answer 14

internal environment

Question 15

maintains homeostasis though a number of self regulating control system

Answer 15

homeostatic mechanisms

Question 16

provide information about specific conditions in the internal environment

Answer 16

receptors

Question 17

tells what a particular value should be

Answer 17

set point

Question 18

cause responses that alter conditions in the internal environment

Answer 18

effectors

Question 19

cell specialization

Answer 19

differentiation

Question 20

fluid outside cells

Answer 20

extracellular fluid

Question 21

fluid in cells

Answer 21

intracellular fluid

Question 22

a hormone secreting cell

Answer 22

interstitial

Question 23

study of the structure and function of tissues

Answer 23

histology

Question 24

process by which changes cause additional similar changes, producing unstable condition

Answer 24

positive feedback

Question 25

mechanism activated by an imbalance that corrects the imbalance

Answer 25

negative feedback