1.3-4 Requirements for life and survival

Question 1

what can the body do?

Answer 1

maintain its boundaries, movement, responsiveness/excitability, digestion, metabolism, excretion, reproduction, growth

Question 2

contractility

Answer 2

muscle cell’s ability to move by shortening

Question 3

responsibility/excitability

Answer 3

ability to sense changes in the environment and respond (most involved is the nervous system)

Question 4

digestion

Answer 4

breakdown of food substances into simple molecules that can be absorbed and used

Question 5

metabolism

Answer 5

all of the chemical reactions that occur within an organism (mostly regulated by hormones)

Question 6

excretion

Answer 6

the process by which wastes are removed from the body

Question 7

reproduction

Answer 7

the process of producing offspring at a cellular and organismal level

Question 8

what are the body’s survival needs?

Answer 8

nutrients, oxygen, water, normal body temperature, atmospheric pressure

Question 9

anabolism

Answer 9

energy-requiring building phase of metabolism where smaller substances are combined to become complex substances

Question 10

catabolism

Answer 10

breakdown of complex molecules/substances into simpler ones (often releases energy)