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Homeostasis & Diffusion Practice

Total questions: 76

Worksheet time: 56mins

Name
Class
Date
1.

Diffusion & Facilitated Diffusion are both __________ transport.

a)

Passive

b)

Active

c)

Easy

d)

Free

2.

Passive Transport is the movement of particles across the membrane from an area of [ ___ ] to an area of [ ___ ]

a)

high to low

b)

low to high

c)

low to low

d)

high to high

3.

Passive Transport uses ____ energy

a)

no

b)

a lot of

c)

a little bit of

d)

some

4.

_____________ is the free movement of particles across the membrane with the concentration gradient

a)

diffusion

b)

facilitated diffusion

c)

active transport

d)

fusion

5.

Passive Transport is the movement of particles _________ the concentration gradient.

a)

with

b)

against

c)

opposing

d)

throughout

6.

An example of diffusion is

a)

CO2 and O2 exchange in the lungs

b)

Glucose transport

c)

Na+ / K+ Pumps

d)

Exocytosis

7.

What is the movement of particles with the concentration gradient using protein "helpers"?

a)

diffusion

b)

facilitated diffusion

c)

active transport

d)

enzymatic reactions

8.

What is a difference between diffusion and facilitated diffusion?

a)

movement of particles from [high] to [low]

b)

a protein "helper"

c)

movement of particles from [low] to [high]

d)

energy

9.

The general name for movement of substances across cell membranes without need of energy input

a)

passive transport

b)

active transport

10.

The condition in which all acting influences are balanced.

a)

equilibrium

b)

dynamic equilibrium

c)

net movement

11.

The number of molecules moving one direction minus the number of molecules moving in the other direction.

a)

equilibrium

b)

dynamic equilibrium

c)

net movement

12.

occurs when the concentration of particles is higher in one area than another.

a)

concentration gradient

b)

concentration

c)

[high] --> [low]

13.

The relative amount of a given substance contained within a solution or in a particular volume of space; the amount of solute per unit volume of solution. The higher the concentration, the more solute is present.

a)

concentration gradient

b)

concentration

c)

[high] --> [low]

14.

Way to display that molecules are moving from an area of high concentration to an area of low concentration.

a)

concentration gradient

b)

concentration

c)

[high] --> [low]

15.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
16.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water
17.
During osmosis
a)
water moves from high to low concentration
b)
large or oddly shaped molecules move across a cell membrane
c)
water moves when energy is used
d)
proteins are built
18.
The diffusion of water through a semi-permeable membrane is called?
a)
Osmosis
b)
Cell wall
c)
Diffusion
d)
Respiration
19.
Where is there a high concentration of water?
a)
in the flower
b)
cannot be determined by picture.
c)
in the vase
d)
in the leaves
20.
What is the definition of  Selective Permeability?
a)
The movement of materials across the cell membrane that requires NO ENERGY from the cell.
b)
The movement of materials through (or across) the cell membrane
c)
The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
d)
The movement of molecules from an area of high concentration to a area of low concentration 
21.
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of
a)
Osmosis
b)
Diffusion
c)
Equilibrium
22.
A person would never have pure water put into their veins in a hospital because their cells would...
a)
Shrink/Dehydrate
b)
Expand
23.
A person should never drink salty water because their cells would
a)
shrink
b)
expand
24.
If there is 5 percent water inside a cell and 5 percent water outside a cell
a)
more water will move inside the cell
b)
more water will move outside the cell
c)
There will be no movement of water cells
25.

What is DIFFUSION?

a)
b)
c)
d)
26.

What happened to the CELL WALL and the CELL MEMBRANE in these plant cells?

a)

Both the CELL WALL and CELL MEMBRANE shrunk

b)

Only the CELL WALL shrunk, the CELL MEMBRANE stayed the same

c)

The CELL WALL stayed the same, only the CELL MEMBRANE shrunk

d)

Both the CELL WALL and CELL MEMBRANE stayed the same

27.

Active transport requires cellular energy and moves substances from area of ________________ concentration to ______________ concentration.

a)

low, low

b)

low, high

c)

high, low

d)

high, high

28.

Cellular energy required for active transport comes directly in the form of _________.

a)

glucose

b)

lipids

c)

ATP

d)

NADPH

29.
Which is NOT a form of active transport?
a)
Endocytosis
b)
Osmosis
c)
Exocytosis
d)
Pinocytosis
30.
The picture is an example of...
a)
active tranport
b)
passive transport
c)
diffusion
d)
osmosis
31.

Positive Feedback loop

a)

decreases the stimulus

b)

increases the stimulus

32.

Negative feedback returns BACK to the set point

a)

False

b)

True

33.
The maintenance of an organism’s internal environment is called:
a)
compensating
b)
homeostasis
c)
balancing
d)
routine
34.
If the environment gets cold, we will often shiver in order to:
a)
keep body temperature the same as the external temperature
b)
decrease body temperature
c)
increase body temperature
d)
regulate blood pressure
35.

Negative Feedback loop

a)

decreases the stimulus

b)

increases the stimulus

36.

This graph shows an example of...

a)

Blood sugar regulation

b)

Homeostasis

c)

Negative feedback

d)

Positive feedback

37.
The "cause" for something to happen is the
a)
response
b)
effect
c)
stimulus
d)
homeostasis
38.

A response is

a)

your body's reaction to change

b)

The change in the environment

c)

what happens

39.

According to the model, what is a normal blood glucose (sugar) level?

a)

270 mg/100mL

b)

180 mg/100 mL

c)

45 mg/100 mL

d)

90 mg/100 mL

40.

According to the model, what is the response to HIGH blood glucose (sugar)?

a)

Pancreas releases insulin into blood

b)

Pancreas releases glucagon into blood

41.

According to the model, what is the response to LOW blood glucose (sugar)?

a)

Pancreas releases insulin into blood

b)

Pancreas releases glucagon into blood

42.

The ability to maintain body temperature within a certain range is ...

a)

thermodynamics

b)

thermoregulation

c)

thermostat

d)

thermometer

43.

How does the body respond when more oxygen is required?

a)

Decreasing heart rate

b)

Increasing heart rate

c)

Decreasing blood pressure

d)

Increasing blood pressure

44.

Identify the STIMULUS.

Scenario: A person begins to exercise which causes their body temperature to increase. The temperature change is noticed and the person begins to sweat and their body temperature decreases.

a)

temperature change is noticed

b)

person begins to sweat

c)

body temperature decreases

d)

person begins to exercise

45.

Identify the RESPONSE.

Scenario: A person begins to exercise which causes their body temperature to increase. The temperature change is noticed and the person begins to sweat and their body temperature decreases.

a)

temperature change is noticed

b)

body temperature increases so the person begins to sweat

c)

body temperature decreases

d)

person begins to exercise

46.
Homeostasis
a)
allows for a wildly fluctuating internal environment
b)
is impossible in vertebrates
c)

is the maintenance of a relatively stable internal environment

d)

is the maintenance of a relatively stable external environment

47.

increases or speeds up original change

a)

negative feedback

b)

positive feedback

c)

endotherm

d)

ectotherm

48.
What type of feedback loop is shown?
a)
negative
b)
neutral 
c)
positive
49.
a body system that controls growth and homeostasis by secreting hormones from glands.
a)
skeletal system
b)
nervous system
c)
endocrine sytem
d)
integumentary system
50.

According to the feedback loop, what does high blood sugar promote?

a)

Insulin Release

b)

Glucagon Release

c)

Insulin Uptake

d)

Glycogen Uptake

51.

Which is an example of a stimulus?

a)

Pancreas detecting an increase in blood glucose.

b)

Drop in blood oxygen.

c)

Salivary glands increasing their release of saliva.

d)

Regulating blood pressure when you go from laying down to standing.

52.

Which of the following statements are true about negative feedback?

a)

Most processes in the body are controlled by negative feedback.

b)

Negative in this case means the opposite direction of the stimulus.

c)

Negative in this case means something bad or problematic.

d)

Goal is to return immediately to homeostasis.

e)

Amplifies the change.

53.

Ectothermics are this.

a)

warm-blooded

b)

cold-blooded

54.

Endothermics are this.

a)

cold-blooded

b)

warm-blooded

55.

Is this picture abiotic or biotic?

a)

Abiotic

b)

Biotic

56.

Is this picture abiotic or biotic?

a)

Abiotic

b)

Biotic

57.

Abiotic can be defined as?

a)

An organism that is alive

b)

Non-living parts of the environment

c)

Living Parts of the environment

d)

A new kind of Pokemon that lives with Pikachu

58.

Biotic can be defined as

a)

the living parts of an environment

b)

non-living parts of an environment

c)

rocks and water

d)

snakes and water

59.
The abiotic factors in this image are ________________.
a)
frog, water, sun
b)
air, water, snail
c)
air, sun, water weeds
d)
air, sun, water
60.

John takes the subway to work every morning. He enjoys drinking his coffee and talking to people that sit near him. The other people on the subway are an example of what type of factor?

a)

Abiotic

b)

Biotic

61.
All of the living and non-living things in an environment are called an _______________. 
a)
population
b)
niche
c)
abitotic
d)
ecosystem
62.

Which of the following examples is a biotic factor?

a)

Soil

b)

Lava

c)

Fungus

d)

Clouds

63.

A collection of living organisms that belong to different populations but all live in the same area and interact with one another is a...

a)

Population

b)

Ecosystem

c)

Community

d)

Ecosphere

64.
If the environment gets cold, we will often shiver in order to:
a)
keep body temperature the same as the external temperature
b)
decrease body temperature
c)
increase body temperature
d)
regulate blood pressure
65.
The two types of feedback systems that help organisms maintain homeostasis are:
a)
positive and negative 
b)
receptor and effector
c)
static and dynamic
d)
minor and major
66.

During osmosis

a)

water moves from high to low concentration

b)

large or oddly shaped molecules move across a cell membrane

c)

water moves when energy is used

d)

proteins are built

67.
Movement of particles from high to low concentration. 
a)
Passive Transport
b)
Active Transport
68.
The cell below is in a _________ solution.
a)
Hypotonic
b)
Hypertonic
c)
Isotonic
69.
The cell below is in a _____________ solution.
a)
Hypertonic
b)
Hypotonic
c)
Isotonic
70.
A cell in an isotonic solution will
a)
swell
b)
shrink
c)
stay the same size
d)
impossible to tell
71.
When a cell is placed in a hypertonic solution water
a)
moves from the inside of the cell to the solution
b)
moves from the solution to the inside of the cell
c)
moves equally in and out of the cell
d)
none of these
72.
When the concentration of particles inside of a cell is the same as the concentration of particles outside of the cell. 
a)
active transport
b)
concentration
c)
diffusion
d)
equilibrium
73.
Something is ___________ ____________
when some molecules can cross the membrane while others cannot. 
a)
Selectively (or Semi) Permeable 
b)
Totally Transparent
c)
Liquid Licorice 
d)
Heavily Patrolled 
74.

In an isotonic solution which way will the water flow

a)

it will not flow at all

b)

it will flow into the cell

c)

it will flow both ways at equal rates

d)

out of the cell

75.

Hypotonic solutions

a)

make cells shrink

b)

make cells swell

76.

Which molecule in the cell membrane is involved in transporting large molecules across the cell membrane

a)

Cholesterol

b)

Protein

c)

Carbohydrates

d)

Sugars

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