diffusion/ homeostasis

Multiple Choice

Which of the following are in the correct order?

• organ system, cell, organ, tissue, organism

• cell, organ, tissue, organ system, organism

• cell, tissue, organelle, organ system, organism

• cell, tissue, organ, organ system, organism

Multiple Choice

Homeostasis mechanisms...

• keep everything exactly the same.

• usually operate by positive feedback systems.

• act to keep the internal environmental conditions outside the normal range

• is the ability to maintain a relatively stable internal environment

Multiple Choice

Which type of feedback system is more common in maintaining homeostasis?

• positive

• negative

• neutral

• balanced

Multiple Choice

What type of feedback system is more dangerous to an organism?

• positive

• negative

• neutral

• balanced

Multiple Choice

This feedback system amplifies a change until a desired outcome is reached.

• positive feedback system

• negative feedback system

• neutral feedback system

• self-monitoring feedback system

Multiple Choice

The reaction of the effector is called..

• response

• sensor

• stimulus

• set point

Multiple Choice

receives and analyzes information received from the sensors

• control center

• effector

• sensor

• response

Multiple Choice

What type of feedback system is described above?

• positive

• negative

• neutral

• leofied

Multiple Choice

What type of feedback system does the model represent?

• positive

• negative

• neutral

• glyogen

Multiple Choice

What is the stimulus in the model above?

• body temperature

• increase in body temperature

• decrease in body temperature

• blood vessels dilating

Multiple Choice

What is an effector in the model above?

• Hypothalamus

• sweat glands

• thermoreceptors

• sweating

Multiple Choice

A change inside of the organism caused by the initiation event is the ...

• response

• effector

• control center

• stimulus

Multiple Choice

Identify the initiation event.

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.

• temperature change is noticed

• person begins to sweat

• body temperature decreases

• person begins to exercise

Multiple Choice

Identify the stimulus event.

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.

• body temperature increases

• person begins to sweat

• temperature change is noticed

• person begins to exercise

Multiple Choice

Identify the response.

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

• the person begins to sweat

• the person begins to exercise

• change in temperature

• body temperature increases

Diffusion and Osmosis Review

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Multiple Choice

What does semipermeable mean?

• No particles or molecules can pass through it

• small particles or molecules can pass through, but larger ones cannot

• large particles or molecules can pass through, but smaller ones cannot

• All particles or molecules can pass through it

Multiple Choice

It is good that water and carbon dioxide can easily pass through the membrane. Along with sunlight, water and carbon dioxide are needed for the process of...

• cellular respiration

• fermentation

• photosynthesis

• mitosis

Multiple Choice

True or False: Passive Transport (diffusion and osmosis) doesn't require the cell to use energy (ATP).

• True

• False

Multiple Choice

Looking at this diagram, which way would the blue particles move?

• To the left

• To the right

• The particles wouldn't move

Multiple Choice

Which of the following statements about diffusion is FALSE?

• Diffusion requires no energy use by the cell

• In diffusion, molecules move from an area of high concentration to an area of lower concentration.

• In diffusion, molecules move from an area of low concentration to an area of higher concentration.

Multiple Choice

Osmosis is the diffusion of which molecule?

• Water

• Sugar

• Salt

• Carbon dioxide

Multiple Choice

In the diagram, the blue circles represent water molecules and the orange circles represent molecules of salt. Which way is the water going to move?

• Out of the cell

• Into the cell

• Water won't cross the membrane at all

Multiple Choice

Which of the following diagrams shows equilibrium?

Multiple Choice

In the given scenario what will happen?  An egg is placed in pure water for 48 hours.

• The egg will gain water and swell.
• Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
• The egg will lose water and shrink.

Multiple Choice

Where is there a low concentration of perfume?

• in the bottle
• on the hand
• in the room
• there is no low concentration of perfume

Multiple Choice

Diffusion occurs only in gases

• True

• False

Multiple Choice

What is DIFFUSION?

Multiple Choice

The process in which a cell harvests energy from glucose and makes it into usable energy for the body is called-----

• cellular fermentation

• anaerobic respiration

• aerobic fermentaion

• cellular respiration

Multiple Choice

Is the glucose (C₆H₁₂O₆) created in photosynthesis a reactant or a product?

• reactant

• product