Bio 436 - Exam 1 Study Questions and
Correct Answers
The study of body functions in a disease state is called ✅pathophysiology
Human bodies are able to maintain a certain constancy of their internal environment.
This statement refers to ✅homeostasis in the body
The 2 main fluid compartments within the body are ✅intracellular fluid
Extracellular fluid: plasma and interstitial fluid
Which is false about homeostatic control mechanisms
1. + feedback mechanisms include responses such as shivering and sweating
2. Info in homeostatic control mechanisms flow from a sensor to an effector to the
control center
3. The central nervous system is usually considered our major control center
4. Most homeostatic control mechanisms use neg. Feedback loops
5. 2 of the above statements are false ✅2 of the above statements are false
The general movement of any molecule from an area of higher conc. To an area of
lower conc. As a result of random thermal motion is called ✅diffusion
Diffusion ✅result of random thermal motion from high to low conc.
Where are carbohydrates located on the membrane ✅only attached on the outside of
the membrane, not the inside
The cells plasma membrane is _______ and ________ ✅fluid and flexible
Where does water molecules move/diffuse through ✅the membrane between the
phospholipid molecules
Is the cells plasma membrane made of a fixed pattern due to them being covalently
bonded? ✅no
The middles of a cell plasma membrane is ______ ✅hydrophobic
Water is a ________ molecule ✅polar
If water is a polar molecule, how does it manage to get through the non-polar area of
the lipid bilayer? ✅it is very small and can pass between the lipid molecules
Which of the following pairs of solutions have the same osmolarity? DOUBLE CHECK
1. 1.0M glucose & 1.0M nacl
2. 1.0M glucose & 2.0M nacl
3. 2.0M glucose & 1.0M nacl
4. 2.0M glucose & 2.0M nacl
, 5. 1 and 4 ✅3. 2.0M glucose & 1.0M nacl
If only osmosis is occurring then water
______________________________________________ ✅moves to an area of
higher solute concentration
Practically speaking, which of the following molecules can pass through a membrane by
simple passive diffusion
-oxygen
-carbon dioxide
-ethanol
-oxygen & ethanol
-all three ✅all three
What can pass through a membrane by simple passive diffusion ✅oxygen, carbon
dioxide, ethanol
Ions and their ability to pass through a membrane ✅carry enough charge that this
prevents them form moving through the plasma membrane by simple diffusion
AND
Are transported across cell membranes with the aid of channels and sometimes pumps
Are ions smaller than gases like carbon dioxide ✅no
How are ions transported across cell membranes ✅with the aid of channel and pumps
Can ions move through a membrane by simple diffusion ✅no
The Na+/K atpase pumps transport _________ # of Na+ ____________ of the cell and
______ # of K+ __________ of the cell ✅3, outside, 2, inside
Which of the following statements about digestion is NOT true
A. Digestion is necessary to break down large molec. So that cells can use the
breakdown product
B. The small intestine is where most of the chemical (enzymatic) digestion occurs
C. The pancreas produces bile for digestion of lipids
D. Enzymes typically consist of an apoenzyme and a coenzyme or cofactor
E. All of the above are true ✅all of the above are true
Digestion is necessary to break down __________ so that cells can us the __________
✅necessary to break down LARGE molecules so that the cells can use the
BREAKDOWN PRODUCT
The _________ is where most of the chemical (enzymatic) digestion occurs ✅the
small intestines
What does the pancreas produce for the digestion of lipids ✅biles
Correct Answers
The study of body functions in a disease state is called ✅pathophysiology
Human bodies are able to maintain a certain constancy of their internal environment.
This statement refers to ✅homeostasis in the body
The 2 main fluid compartments within the body are ✅intracellular fluid
Extracellular fluid: plasma and interstitial fluid
Which is false about homeostatic control mechanisms
1. + feedback mechanisms include responses such as shivering and sweating
2. Info in homeostatic control mechanisms flow from a sensor to an effector to the
control center
3. The central nervous system is usually considered our major control center
4. Most homeostatic control mechanisms use neg. Feedback loops
5. 2 of the above statements are false ✅2 of the above statements are false
The general movement of any molecule from an area of higher conc. To an area of
lower conc. As a result of random thermal motion is called ✅diffusion
Diffusion ✅result of random thermal motion from high to low conc.
Where are carbohydrates located on the membrane ✅only attached on the outside of
the membrane, not the inside
The cells plasma membrane is _______ and ________ ✅fluid and flexible
Where does water molecules move/diffuse through ✅the membrane between the
phospholipid molecules
Is the cells plasma membrane made of a fixed pattern due to them being covalently
bonded? ✅no
The middles of a cell plasma membrane is ______ ✅hydrophobic
Water is a ________ molecule ✅polar
If water is a polar molecule, how does it manage to get through the non-polar area of
the lipid bilayer? ✅it is very small and can pass between the lipid molecules
Which of the following pairs of solutions have the same osmolarity? DOUBLE CHECK
1. 1.0M glucose & 1.0M nacl
2. 1.0M glucose & 2.0M nacl
3. 2.0M glucose & 1.0M nacl
4. 2.0M glucose & 2.0M nacl
, 5. 1 and 4 ✅3. 2.0M glucose & 1.0M nacl
If only osmosis is occurring then water
______________________________________________ ✅moves to an area of
higher solute concentration
Practically speaking, which of the following molecules can pass through a membrane by
simple passive diffusion
-oxygen
-carbon dioxide
-ethanol
-oxygen & ethanol
-all three ✅all three
What can pass through a membrane by simple passive diffusion ✅oxygen, carbon
dioxide, ethanol
Ions and their ability to pass through a membrane ✅carry enough charge that this
prevents them form moving through the plasma membrane by simple diffusion
AND
Are transported across cell membranes with the aid of channels and sometimes pumps
Are ions smaller than gases like carbon dioxide ✅no
How are ions transported across cell membranes ✅with the aid of channel and pumps
Can ions move through a membrane by simple diffusion ✅no
The Na+/K atpase pumps transport _________ # of Na+ ____________ of the cell and
______ # of K+ __________ of the cell ✅3, outside, 2, inside
Which of the following statements about digestion is NOT true
A. Digestion is necessary to break down large molec. So that cells can use the
breakdown product
B. The small intestine is where most of the chemical (enzymatic) digestion occurs
C. The pancreas produces bile for digestion of lipids
D. Enzymes typically consist of an apoenzyme and a coenzyme or cofactor
E. All of the above are true ✅all of the above are true
Digestion is necessary to break down __________ so that cells can us the __________
✅necessary to break down LARGE molecules so that the cells can use the
BREAKDOWN PRODUCT
The _________ is where most of the chemical (enzymatic) digestion occurs ✅the
small intestines
What does the pancreas produce for the digestion of lipids ✅biles
