BI 331 Quiz Questions
Arrange the following structures in the correct order starting with the simplest level of
organization and ending with the most complex.
1. Cell membrane
2. Epithelial cell
3. Human
4. Digestive system
5. Phospholipid
6. Small intestine - answer5, 1, 2, 6, 4, 3
When you swim in a pool, your body gains water. What most likely explains this
observation?
-The pool water is relatively less salty than the inside of your body (and cells).
-The pool water is the same relative saltiness as the inside of your body (and cells).
-The pool water is relatively more salty than the inside of your body (and cells). -
answer-The pool water is relatively less salty than the inside of your body (and cells).
Glucose and oxygen are used by cells to produce energy for muscle action - this
process occurs within each cell. Your new workout partner tells you that the supplement
he's taking allows him to produce more energy (and have a better workout) because it
increases oxygen delivery by increasing the number of cell membrane protein carriers
for oxygen. What would you say to him?
-That sounds great - can I have some?
-Yes, the number of oxygen molecules that can enter a cell is directly related to the
number of oxygen transport proteins on the cell membrane.
-This seems unlikely because oxygen does not require membrane proteins for transport
across the cell membrane. - answer-This seems unlikely because oxygen does not
require membrane proteins for transport across the cell membrane.
Your heart pumps blood at variable rates depending on your degree of physical activity
or neural/hormonal activity (this is called heart rate). With exercise or fear, heart rate
increases to pump more blood to an active body. Yet after exercise, heart rate
decreases to a resting level. There are several nerves and hormones that stimulate
heart rate to increase as needed, or decrease when needed, but there is no receptor
that monitors heart rate. Is heart rate homeostatically regulated? - answerNo
Homeostatic regulation requires 3 components: a receptor, a control center and an
effector. Without a receptor, there cannot be homeostatic regulation.
, Suppose you are a cytologist and you are examining a cell under the microscope. You
observe that inside the cell there are many flattened, sac-like structures, many of them
with small round granules. Based on this information, which of the following conclusions
would be most logical?
-The cell produces many proteins for export.
-The cell is capable of motion.
-The cell lacks a cell membrane.
-The cell is incapable of cellular division. - answerThe cell produces many proteins for
export.
What do we call the process whereby a molecule crosses the cell membrane, moving
from a high concentration of itself to a low concentration of itself, by dissolving through
the phospholipid portion of the cell membrane? (Select the single best answer that
describes this specific circumstance.)
simple diffusion
passive transport
active transport
facilitated diffusion - answersimple diffusion
When you swim in the ocean you lose water. What most likely explains this
observation?
-The ocean water is relatively the same saltiness as the inside of your body (and cells)
-The ocean water is relatively saltier than the inside of your body (and cells)
-The ocean water is relatively less salty than the inside of your body (and cells) -
answerThe ocean water is relatively saltier than the inside of your body (and cells)
What directly causes a voltage gated channel to open?
-A neurotransmitter binding on the voltage gated channel
-ATP
-A mechanical force pushing on the channel
-A change in the transmembrane potential due to some factor - answer-A change in the
transmembrane potential due to some factor
Which of the following would be most likely found in a cell that is subjected to significant
mechanical strain (such as a cell in the outer skin)?
The cell would have many smooth ER
The cell would have many golgi apparatuses
The cell would have many cytoskeletal elements
The cell would lack phospholipids in its cell membrane - answerThe cell would have
many cytoskeletal elements
Arrange the following structures in the correct order starting with the simplest level of
organization and ending with the most complex.
1. Cell membrane
2. Epithelial cell
3. Human
4. Digestive system
5. Phospholipid
6. Small intestine - answer5, 1, 2, 6, 4, 3
When you swim in a pool, your body gains water. What most likely explains this
observation?
-The pool water is relatively less salty than the inside of your body (and cells).
-The pool water is the same relative saltiness as the inside of your body (and cells).
-The pool water is relatively more salty than the inside of your body (and cells). -
answer-The pool water is relatively less salty than the inside of your body (and cells).
Glucose and oxygen are used by cells to produce energy for muscle action - this
process occurs within each cell. Your new workout partner tells you that the supplement
he's taking allows him to produce more energy (and have a better workout) because it
increases oxygen delivery by increasing the number of cell membrane protein carriers
for oxygen. What would you say to him?
-That sounds great - can I have some?
-Yes, the number of oxygen molecules that can enter a cell is directly related to the
number of oxygen transport proteins on the cell membrane.
-This seems unlikely because oxygen does not require membrane proteins for transport
across the cell membrane. - answer-This seems unlikely because oxygen does not
require membrane proteins for transport across the cell membrane.
Your heart pumps blood at variable rates depending on your degree of physical activity
or neural/hormonal activity (this is called heart rate). With exercise or fear, heart rate
increases to pump more blood to an active body. Yet after exercise, heart rate
decreases to a resting level. There are several nerves and hormones that stimulate
heart rate to increase as needed, or decrease when needed, but there is no receptor
that monitors heart rate. Is heart rate homeostatically regulated? - answerNo
Homeostatic regulation requires 3 components: a receptor, a control center and an
effector. Without a receptor, there cannot be homeostatic regulation.
, Suppose you are a cytologist and you are examining a cell under the microscope. You
observe that inside the cell there are many flattened, sac-like structures, many of them
with small round granules. Based on this information, which of the following conclusions
would be most logical?
-The cell produces many proteins for export.
-The cell is capable of motion.
-The cell lacks a cell membrane.
-The cell is incapable of cellular division. - answerThe cell produces many proteins for
export.
What do we call the process whereby a molecule crosses the cell membrane, moving
from a high concentration of itself to a low concentration of itself, by dissolving through
the phospholipid portion of the cell membrane? (Select the single best answer that
describes this specific circumstance.)
simple diffusion
passive transport
active transport
facilitated diffusion - answersimple diffusion
When you swim in the ocean you lose water. What most likely explains this
observation?
-The ocean water is relatively the same saltiness as the inside of your body (and cells)
-The ocean water is relatively saltier than the inside of your body (and cells)
-The ocean water is relatively less salty than the inside of your body (and cells) -
answerThe ocean water is relatively saltier than the inside of your body (and cells)
What directly causes a voltage gated channel to open?
-A neurotransmitter binding on the voltage gated channel
-ATP
-A mechanical force pushing on the channel
-A change in the transmembrane potential due to some factor - answer-A change in the
transmembrane potential due to some factor
Which of the following would be most likely found in a cell that is subjected to significant
mechanical strain (such as a cell in the outer skin)?
The cell would have many smooth ER
The cell would have many golgi apparatuses
The cell would have many cytoskeletal elements
The cell would lack phospholipids in its cell membrane - answerThe cell would have
many cytoskeletal elements
