Chapter 1

Question 1

Levels of Organization

Answer 1

1)Atom 2)molecules 3) cells 4)tissue 5) Organ 6) Organ System 7)Organism

Question 2

Integumentary System

Answer 2

Waterproofs the body, Protects deeper tissue, regulates body temperature. Skin.

Question 3

Skeletal System

Answer 3

Supports the body, provides muscle attachment points, creates blood cells. Femur.

Question 4

Muscular System

Answer 4

produces movement, maintains posture, produces heat. deltoid

Question 5

nervous system

Answer 5

responds to internal and external change in a quick acting manner, activates muscles and glands. Brain

Question 6

Endocrine system

Answer 6

in charge of things that need to happen slowly like growth, metabolism, and reproduction. Pancreas.

Question 7

cardiovascular system

Answer 7

transports materials throughout the body. Heart

Question 8

Lymphatic System

Answer 8

Returns fluids to the vessels, cleanses blood, involved in immunity. Lymph nodes

Question 9

Respiratory system

Answer 9

gas exchange of CO2 and O2. Lungs

Question 10

Digestive system

Answer 10

Breaks down food, absorbs nutrients, gets rid of waste. Stomach

Question 11

Urinary system

Answer 11

eliminates waste, maintains acid-base balance, regulates water and electrolites

Question 12

Reproductive system

Answer 12

Produce offspring, create hormones. Testes

Question 13

nutrients

Answer 13

Carbohydrates, lipids, proteins, vitamins, minerals

Question 14

% of oxygen we get from the oceans

Answer 14

80%

Question 15

percent of our body weight that is water

Answer 15

60-80%

Question 16

Necessary life functions list

Answer 16

1)Maintain boundaries 2)Movement 3) Responsiveness 4) Digestion 5) Metabolism 6) Excretion 7) Reproduction 8) Growth

Question 17

Maintain Boundaries

Answer 17

keeping what is inside and what is outside separate. Integumentary system/ cell membranes

Question 18

movement

Answer 18

moving body parts/ substances

Question 19

Responsiveness/ irritability

Answer 19

ability to sense and react to stimuli in the environment

Question 20

Digestion

Answer 20

The ability to break down food into nutrients the body is capable of using

Question 21

metabolism

Answer 21

all the chemical reactions that take place in cells

Question 22

Survival needs list

Answer 22

Nutrients, oxygen, water, stable body temperature, atmospheric pressure

Question 23

homeostasis def

Answer 23

maintenance of stable internal conditions

Question 24

negative feedback

Answer 24

something gets out of balance and a negative feedback mechanism straightens it out and returns it to balance. Ex. having to pee. your body makes you think you need to pee until you do

Question 25

positive feedback

Answer 25

responds to a stimulus by making it more extreme. Ex. blood clot, your body keeps sending platelets to the wound to stop the blood flow.

Question 26

which two systems are most active in preserving homeostasis

Answer 26

nervous and endocrine

Question 27

elements of homeostasis

Answer 27

1)Stimulus2)receptor3) input sent down afferent pathway 4) control center 5) Output sent down efferent pathway to an effector 6) Response of the effector to the output