IPHY 3430 Homework Questions All
Answered Correctly Graded A+ 2026
Updated.
The Brain is an example of what level of organization (highest level of organization)?
a. atom
b. cell
c. molecule
d. organ
e. organ system
f. tissue - Answer d. organ
Determine whether the following statements are mechanistic or teleological
"Glucose is transported from the blood into the cells by transporters in response to insulin"
"Glucose is transported from the blood into the cells because cells require glucose to meet their
energy needs"
a. mechanistic, mechanistic
b. mechanistic, teleological
c. teleological
d. teleological, teleological - Answer b. mechanistic (how), teleological (why)
Which of the following would be an example of mechanical work? choose all that apply
a. ATP donating a phosphate group to an enzyme
b. the beating of cilia
c. cell changing shape
d. movement of organelles in the cell
e. movement of glucose across the cell membrane
f. muscle contraction - Answer b,c,d,f
,A compressed spring represents what type of energy? When a spring is allowed to "spring", or
decompresses, what type of. energy does this represent?
a. Kinetic, Kinetic
b. kinetic, potential
c. potential, kinetic
d. potential, potential - Answer c. potential, kinetic
In what 3 forms is energy stored in the body? Choose all that apply
a. chemical bonds
b. concentration gradients
c. electrical gradients
d. entropy
e. kinetic energy - Answer a. chemical, b. concentration and c. electrical
Which type of the following molecules do you think has the greatest amount of stored energy?
a. Carbon Monoxide
b. Cholesterol
c. Fructose
d. Glycogen
e. All would have the same amount of free energy - Answer d. Glycogen (stores glucose)
Repeated exposure to hot environments when combined with exercise improves exercise
capacity, with less discomfort upon subsequent heat exposure. One thing that changes is that
the person begins sweating sooneer and they sweat more (nearly double)
Sweating sooner represents what type of change?
a. decreased threshold
b. increased threshold
c. decreased set point
d. increased set point - Answer a. decreased threshold
bc if you decrease the threshold you are lowering it , so it will be easier to reach
,Which statements about control strategy is/are incorrect? Choose all that apply
a. An advantage of a feedforward system is that it allows the body to anticipate a change, or
prepare for something to happen
b. A disadvantage of a feedforward system is that it doesn't allow you to respond to an
unexpected change
c. An advantage of a positive feedback system is it allows for rapid changes to a regulated
variable
d. A disadvantage of a positive feedback system is that it is not homeostatic
e. A disadvantage of a negative feedback system is it requires some outside event to. stop the
response
f. All of the above are correct - Answer e. A disadvantage of a negative feedback system is it
requires some outside event to. stop the response
Water is polar; organic solvents are nonpolar. A substance is found to dissolve in organic
solvents but not in water. Is this substance most likely polar, nonpolar, or both
a. both
b. nonpolar
c. polar - Answer b. nonpolar
There is an amino acid transporter that only transports acidic amino acids, another that
transports basic amino acids, and a third that transports neutral amino acids. This is an example
of which protein characteristic?
a. affinity
a. saturation
c. specificity - Answer c. specificity
Both curare and a-bungarotoxin bind to the nicotinic acetylcholine receptor and block its action.
Curare binds temporarily to the protein, while a-bungarotoxin binds to it irreversibly. Which
shows the most affinity?
a. acetylcholine
b. curare
c. α-bungarotoxin
d. both acetylcholine and curare
, e. No difference in affinity - Answer c. α-bungarotoxin
Many people die each year from ingesting antifreeze solutions. Antifreeze contains ethylene
glycol, which the human body converts to oxalic acid in the presence of the enzyme alcohol
dehydrogenase. Oxalic acid exists in crystalline form and these crystals can severely damage
kidneys. Ethanol is administered to victims with ethylene glycol poisoning bc ethanol binds to
the active site of alcohol dehydrogenase, inhibiting the formation of oxalate crystals
How would you classify ethanol in this scenario?
a. allometric inhibitor of ethylene glycol
b. allosteric inhibitor of ethylene glycol
c. cofactor of ethylene glycol
d. competitive inhibitor of ethylene glycol
e. covalent inhibitor of ethylene glycol - Answer d. competitive inhibitor of ethylene glycol
How are enzymes typically inactivated in the human body? Choose all that apply
a. changing pH in the cytoplasm to 7.4
b. changing the team to 37 degrees Celsius
c. denaturation
d. interaction with inhibitor
e. interaction with zymogen - Answer c. denaturation
d. interaction with inhibitor
Which type of amino acid would you expect to find crossing the plasma membrane?
a. hydrophobic
b. hydrophilic
c. lipophilic
d. hydrophobic and hydrophilic
e. hydrophobic and lipophilic - Answer e. hydrophobic and lipophilic
What is a characteristic that distinguishes between simple diffusion and facilitated diffusion?
a. in simple diffusion, active transport is used; in facilitated diffusion, it is not
Answered Correctly Graded A+ 2026
Updated.
The Brain is an example of what level of organization (highest level of organization)?
a. atom
b. cell
c. molecule
d. organ
e. organ system
f. tissue - Answer d. organ
Determine whether the following statements are mechanistic or teleological
"Glucose is transported from the blood into the cells by transporters in response to insulin"
"Glucose is transported from the blood into the cells because cells require glucose to meet their
energy needs"
a. mechanistic, mechanistic
b. mechanistic, teleological
c. teleological
d. teleological, teleological - Answer b. mechanistic (how), teleological (why)
Which of the following would be an example of mechanical work? choose all that apply
a. ATP donating a phosphate group to an enzyme
b. the beating of cilia
c. cell changing shape
d. movement of organelles in the cell
e. movement of glucose across the cell membrane
f. muscle contraction - Answer b,c,d,f
,A compressed spring represents what type of energy? When a spring is allowed to "spring", or
decompresses, what type of. energy does this represent?
a. Kinetic, Kinetic
b. kinetic, potential
c. potential, kinetic
d. potential, potential - Answer c. potential, kinetic
In what 3 forms is energy stored in the body? Choose all that apply
a. chemical bonds
b. concentration gradients
c. electrical gradients
d. entropy
e. kinetic energy - Answer a. chemical, b. concentration and c. electrical
Which type of the following molecules do you think has the greatest amount of stored energy?
a. Carbon Monoxide
b. Cholesterol
c. Fructose
d. Glycogen
e. All would have the same amount of free energy - Answer d. Glycogen (stores glucose)
Repeated exposure to hot environments when combined with exercise improves exercise
capacity, with less discomfort upon subsequent heat exposure. One thing that changes is that
the person begins sweating sooneer and they sweat more (nearly double)
Sweating sooner represents what type of change?
a. decreased threshold
b. increased threshold
c. decreased set point
d. increased set point - Answer a. decreased threshold
bc if you decrease the threshold you are lowering it , so it will be easier to reach
,Which statements about control strategy is/are incorrect? Choose all that apply
a. An advantage of a feedforward system is that it allows the body to anticipate a change, or
prepare for something to happen
b. A disadvantage of a feedforward system is that it doesn't allow you to respond to an
unexpected change
c. An advantage of a positive feedback system is it allows for rapid changes to a regulated
variable
d. A disadvantage of a positive feedback system is that it is not homeostatic
e. A disadvantage of a negative feedback system is it requires some outside event to. stop the
response
f. All of the above are correct - Answer e. A disadvantage of a negative feedback system is it
requires some outside event to. stop the response
Water is polar; organic solvents are nonpolar. A substance is found to dissolve in organic
solvents but not in water. Is this substance most likely polar, nonpolar, or both
a. both
b. nonpolar
c. polar - Answer b. nonpolar
There is an amino acid transporter that only transports acidic amino acids, another that
transports basic amino acids, and a third that transports neutral amino acids. This is an example
of which protein characteristic?
a. affinity
a. saturation
c. specificity - Answer c. specificity
Both curare and a-bungarotoxin bind to the nicotinic acetylcholine receptor and block its action.
Curare binds temporarily to the protein, while a-bungarotoxin binds to it irreversibly. Which
shows the most affinity?
a. acetylcholine
b. curare
c. α-bungarotoxin
d. both acetylcholine and curare
, e. No difference in affinity - Answer c. α-bungarotoxin
Many people die each year from ingesting antifreeze solutions. Antifreeze contains ethylene
glycol, which the human body converts to oxalic acid in the presence of the enzyme alcohol
dehydrogenase. Oxalic acid exists in crystalline form and these crystals can severely damage
kidneys. Ethanol is administered to victims with ethylene glycol poisoning bc ethanol binds to
the active site of alcohol dehydrogenase, inhibiting the formation of oxalate crystals
How would you classify ethanol in this scenario?
a. allometric inhibitor of ethylene glycol
b. allosteric inhibitor of ethylene glycol
c. cofactor of ethylene glycol
d. competitive inhibitor of ethylene glycol
e. covalent inhibitor of ethylene glycol - Answer d. competitive inhibitor of ethylene glycol
How are enzymes typically inactivated in the human body? Choose all that apply
a. changing pH in the cytoplasm to 7.4
b. changing the team to 37 degrees Celsius
c. denaturation
d. interaction with inhibitor
e. interaction with zymogen - Answer c. denaturation
d. interaction with inhibitor
Which type of amino acid would you expect to find crossing the plasma membrane?
a. hydrophobic
b. hydrophilic
c. lipophilic
d. hydrophobic and hydrophilic
e. hydrophobic and lipophilic - Answer e. hydrophobic and lipophilic
What is a characteristic that distinguishes between simple diffusion and facilitated diffusion?
a. in simple diffusion, active transport is used; in facilitated diffusion, it is not
