Test practice

Question 1

Endocrine system function?

Answer 1

regulates all biological processes in the body

Question 2

Digestive system function?

Answer 2

Breaks down food into nutrients

Question 3

Definition of feedback loops

Answer 3

a biological occurrence wherein the output of a system amplifies the system (positive feedback) or inhibits the system (negative feedback).

Question 4

Respiratory system function?

Answer 4

Moves fresh air into body while removing waste gases

Question 5

Integumentary system function?

Answer 5

• Regulates body temperature
• Cell fluid maintenance
• Synthesis of vitamin D
• Detection of stimuli

Question 6

Immune system function?

Answer 6

Defends the body against infection while protecting the bodys own cells

Question 7

Musculoskeletal function?

Answer 7

Supports you and helps you move

Question 8

Reproductive system function?

Answer 8

Produce egg and sperm cells

Question 9

Excretory system function?

Answer 9

Removes waste from body

Question 10

Nervous system function?

Answer 10

transmits signals between the brain and the rest of the body

Question 11

Circulatory system function?

Answer 11

delivers oxygen and nutrients to cells and takes away waste

Question 12

Cell definition

Answer 12

smallest structural and functional unit of an organism

Question 13

Tissue definition

Answer 13

a group or layer of cells that work together to perform a specific function

Question 14

Organ definition

Answer 14

a part of the body that performs a specific function

Question 15

Organ system definition

Answer 15

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

Question 16

Definition of organism

Answer 16

a living thing

Question 17

Heart definition

Answer 17

a fist sized organ that pumps blood throughout your body

Question 18

Brain definition

Answer 18

the organ inside the head that controls all body functions of a human being

Question 19

Kidney definition

Answer 19

An organs that function is is primarily excretion of extra fluids as wastes

Question 20

Intestines definition

Answer 20

Long tube shaped organ in the abdomen that completes the process of digestion

Question 21

Stomach definition

Answer 21

An organ that is a part of the digestive system.

Question 22

Homeostasis definition

Answer 22

Balance or equilibrium

Question 23

Whats a positive feedback loop?

Answer 23

A change in a given direction causes additional change in the same direction

Question 24

Whats a negative feedback loop?

Answer 24

A change in a given direction that causes change in the opposite direction

Question 25

Active transport definition?

Answer 25

a kind of cellular transport where substances move against a concentration gradient.

Question 26

Passive transport definition?

Answer 26

the movement of ions and molecules across the cell membrane without requiring energy.

Question 27

Osmosis definition?

Answer 27

the net movement of water across a semipermeable membrane

Question 28

Diffusion definition

Answer 28

the movement of a substance from an area of high concentration to an area of lower concentration

Question 28

Diffusion definition

Answer 28

the movement of a substance from an area of high concentration to an area of lower concentration

Question 28

Diffusion definition

Answer 28

the movement of a substance from an area of high concentration to an area of lower concentration

Question 29

Why does a single celled organism function with only organelles but a multicellular organism needs tissues, organs, and organ systems to carry out life functions.

Answer 29

Single celled organisms contain every structure they need to survive within their one cell while Mulicellular organisms need tissues to provide structural and strength

Question 30

What is a feedback loop?

Answer 30

the part of a system in which some portion (or all) of the system's output is used as input for future operations.

Question 31

How can feedback loops help an organism maintain homeostasis?

Answer 31

Homeostasis of the body involves reaction times that must be met so that body functions can occur and keep the body healthy.

Question 32

Describe how the structure of the cell membrane facilitates is function

Answer 32

It forms a physical barrier and as a barrier between the cell and the external environment as it allows only selected necessary molecules to pass through it and at the same time prevents entry of unwanted / unnecessary substances. It also regulates the entry and exit of molecules into and out of the cell.

Question 33

Whats the difference between osmosis and diffusion?

Answer 33

In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.

Question 34

Explain different types of passive and active transport.

Answer 34

Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy