Ch. 2 and 3 study

Question 1

What are many unicellular organisms called?

Answer 1

micro-organisms

Question 2

What do unicellular organisms do?

Answer 2

obtain food and get rid of excess waste

Question 3

What are specialized to carry out specific functions?

Answer 3

cells

Question 4

What type of cell with thick cell walls provide support and strength?

Answer 4

plant cell

Question 5

What allows movement of cells?

Answer 5

cilia

Question 6

What type of blood cell can carry oxygen to all the cells of the body?

Answer 6

red blood cells

Question 7

What type of blood cell can engulf invaders?

Answer 7

white blood cells

Question 8

What move into a cell and waste is removed from a cell through a cell membrane?

Answer 8

nutrients

Question 9

is several smaller cells more efficient than one large cell? If true, why?

Answer 9

true

Question 10

cells in the human body are organized into what?

Answer 10

tissues

Question 11

What are three types of tissues that are found throughout the body?

Answer 11

nerve, muscle and blood

Question 12

True or false. The cells in tissues are all alike or very similar and have the same function.

Answer 12

true

Question 13

groups of tissues are organized into organs. What are groups of organs referred to?

Answer 13

organ systems

Question 14

give 3 examples of organs that have one or more types of tissue?

Answer 14

heart, kidneys, lungs

Question 15

name the 6 systems that are composed of different organs that have related functions>

Answer 15

the circulatory, nervous, excretory, digestive, respiratory, and endocrine systems

Question 16

true or false. Some diseases are caused when cells are invaded by microscopic living things.

Answer 16

true

Question 17

What do some micro-organisms, such as bacteria, protists and fungi cause in humans?

Answer 17

illnesses and diseases in humans

Question 18

Which is a living NOT a living organisms but also cause diseases and illness by invading cells?

Answer 18

viruses

Question 19

What depends on how well your systems work together?

Answer 19

your health

Question 20

what is designed to protect the body against invaders?

Answer 20

White blood cells and antibodies.

Question 21

What involves modifying the genetic material of an organism to improve the organism or to make helpful products?

Answer 21

genetic engineering

Question 22

what are the two main types of systems that animals have

Answer 22

those that obtain and use nutrients and remove waste and those that control the functions of the body

Question 23

what does the respiratory system do

Answer 23

absorbs oxygen and gets rid of carbon dioxide

Question 24

what system distributes blood containing oxygen and nutrients

Answer 24

circulatory system

Question 25

what organs get rid of waste and regulate the amount of water in the body

Answer 25

kidneys

Question 26

true or false. different parts of the digestive system and other organs play special roles in the digestion of food

Answer 26

true

Question 27

what system transmits messages throughout the body

Answer 27

the nervous system

Question 28

what sends messages to the brain

Answer 28

sensory neurons

Question 29

what carries messages from the brain to muscles

Answer 29

motor neurons

Question 30

what 2 systems regulate what goes on inside the body

Answer 30

nervous system and endocrine system

Question 31

what systems cannot function properly with other systems

Answer 31

animal systems

Question 32

which system brings in oxygen and which system distributes it around the body

Answer 32

respiratory system; circulatory system

Question 33

when cells produce waste that diffuses into the blood stream it's filtered out by what organ

Answer 33

filtered out by the kidneys then eliminated from the body

Question 34

what system breaks down food

Answer 34

digestive system

Question 35

what system distributes the nutrients around the body

Answer 35

circulatory system

Question 36

do humans have a natural system that protects them from foreign invaders

Answer 36

yes

Question 37

name 3 physical barriers that keep invaders out of the human body

Answer 37

skin, mucus and ear wax

Question 38

what is the role of special white blood cells

Answer 38

engulf and destroy invaders

Question 39

what does the immune system produce and destroy

Answer 39

immune system produces antibodies that destroy invaders