Download Scenario 1

Scenario 1
Blood passing through the brain is constantly monitored. If the amount of water in the
blood falls below normal, a hormone (chemical message) is released into the blood,
which passes through the bloodstream to the kidneys. The hormone signals to the
kidneys that more water is needed in the blood. Water then diffuses into the blood, so the
water content of the blood remains constant. As a result the urine becomes more
concentrated.
Show with a large diagram on poster paper, the process occurring to the blood cell in this
scenario. Identify the net direction of water.
Is this an example of passive or active transport? ___________________________
Is this an example of diffusion or osmosis? _______________________________
Is the blood cell hypotonic or hypertonic to the body’s fluids before the brain sends a
signal to the kidneys?
________________________
What might a person do to cause the water content of their blood to fall?
________________________
________________________
________________________
Scenario 2
Blood carries oxygen from your lungs to the rest of your body. As you inhale, air with a
high oxygen concentration is drawn into small sacs within your lungs, called alveoli. The
air in the alveoli has a higher oxygen concentration than the blood in the tiny blood
vessels surrounding the alveoli. Oxygen will diffuse out of the alveoli and into your
blood.
Show with a large diagram on poster paper, the process occurring to the blood cell in this
scenario. Identify the net direction of oxygen.
Is this an example of passive or active transport? ___________________________
Is this an example of diffusion or osmosis? _______________________________
Does this process require cellular energy? _______________________________
Scenario 3
Your body contains three types of white blood cells that do a variety of things to keep
you healthy. The most important white blood cell is a granulocyte. When a bacteria cell
enters the body, often at the site of a scratch or more serious skin injury, the granulocyte
attacks the bacteria cell and engulfs it. The pus that accumulates at the site of an
infection consists of mostly these white blood cells.
Show with a large diagram on poster paper, the process occurring to the blood cell in this
scenario. Identify the net direction of the bacteria cell.
Is this an example of passive or active transport? ___________________________
What is this process of engulfing a cell called? _______________________________
What organelle will the bacteria cell be transported to within the cell to be destroyed?
____________________________
Scenario 4
Your skin is made up of two layers, the epidermis and the dermis. The epidermis
produces an oily protein that repels water. When you soak in the bathtub for a long time
or swim for a long time, the protein is sloughed off. As a result, your skin cells begin to
swell from the excess water, and they look wrinkled.
Show with a large diagram on poster paper, the process occurring to the skin cell in this
scenario. Identify the net direction of water.
Is this an example of passive or active transport? ___________________________
Is this an example of diffusion or osmosis? _______________________________
Is the solute content in the skin cell hypotonic or hypertonic to the water in the tub or
pool? ________________________