Organisations of the human body

Question 1

Define atom

Answer 1

the smallest part of a substance that cannot be broken down chemically

Question 2

Define molecule

Answer 2

the chemical combination of two or more atoms

Question 3

Define cell

Answer 3

the basic structural, functional and biological unit of all known living organisms

Question 4

Define tissue

Answer 4

a community of similar cells

Question 5

Define organ

Answer 5

Made up of two or more types of tissues

Question 6

Define system

Answer 6

Two or more organs working together to perform a bodily function

Question 7

What are the bodies 4 survival needs

Answer 7

nutrients, oxygen, temperature, pressure

Question 8

What are the life functions

Answer 8

organisation, responsiveness, metabolism, growth/development/reproduction

Question 9

Name two functions of the integumentary system

Answer 9

protects deeper tissue from injury, synsethises vitamin D

Question 10

Name two functions of the skeletal system

Answer 10

protects and supports body organs, stores minerals

Question 11

Name two functions of the muscular system

Answer 11

maintains posture, produces heat

Question 12

Name two functions of the nervous system

Answer 12

control system of the body, responds to internal and external stimulus

Question 13

Name the function of the endocrine system

Answer 13

secretes hormones that regulate cell growth, reproduction, nutrient use etc.

Question 14

Name two functions of the respiratory system

Answer 14

keeps the blood constantly supplied with oxygen, expels carbon dioxide

Question 15

Name two functions of the cardiovascular system

Answer 15

the heart pumps blood, the blood vessels transport blood

Question 16

Name two functions of the digestive system

Answer 16

breaks down absorbable units that enter the blood stream, eliminates indigestible waste as faeces

Question 17

Name two functions of the urinary system

Answer 17

Eliminates nitrogenous waste. Regulates water, electrolyte and acid-base levels

Question 18

Name two functions of the lymphatic system

Answer 18

picks up fluid leaked from blood vessels and returns it to blood stream, stores lymphocytes

Question 19

Name two functions of the reproductive system

Answer 19

produces sex hormones, sperm and eggs, facilitates conception and reproduction

Question 20

Define homeostasis

Answer 20

The tendency to resist change in order to maintain a stable, relatively constant internal environment

Question 21

What is a negative feedback loop and give an example

Answer 21

a response that reverses the original stimulus, eg. body temperature

Question 22

What is a positive feedback loop and give an example

Answer 22

a response that intensifies the original stimulus, eg. enhancement of contraction by oxytocin