7.4 Homeostasis and Cells

Question 1

Are there more unicellular or multicellular organisms on Earth?

Answer 1

unicellular

Question 2

Homeostatsis:

Answer 2

relatively constant internal, physical, and chemical conditions

Question 3

how do unicellular organisms maintain homeostasis?

Answer 3

grow, respond to the environment, transfer energy, reproduce (ex: prokaryotes especially bacteria are very adaptable)

Question 4

the cells of multicellular organisms become_____ and _______

Answer 4

specilized for particular tasks and communicate with one another to maintain homeostasis

Question 5

Cells of a multicellular organism are specialized with:

Answer 5

with differnet cell types playing different roles

Question 6

2 examples of cell specilization:

Answer 6

human trachea epithelium: sweep mucus, debris, bacteria out of your lungs
Pine pollen: pines release specilized pollen grains to produce offsprings far away

Question 7

tissue:

Answer 7

a group of similar cells that performs a particular function

Question 8

organ:

Answer 8

many groups of tissue working together

Question 9

Organ system:

Answer 9

a group of organs that work together to performs a specific function

Question 10

Organization of the body’s cells into tissues, organs, and organ systems creates a:

Answer 10

divison of labor among these cells that allows the organism to maintain homeostasis

Question 11

receptors are needed to:

Answer 11

needed to respond to chemical signals (signaling molecules bind to the receptor)