Bio 121 test UPDATED ACTUAL Exam
Questions and CORRECT Answers
Sweating is initiated in response to a rise in body temperature that occurs on exposure to a hot
environment. Evaporation of the sweat cools the body. This is an example of: - CORRECT
ANSWER - Negative feedback
A mechanism that "anticipates" a change in homeostasis in the body and makes adjustments is
termed a: - CORRECT ANSWER - Feedforward mechanism
Muscle cells contain numerous __________ because of their high demand for ATP: - CORRECT
ANSWER - Mitochondria
What is not considered a function of the Golgi complex? - CORRECT ANSWER -
Functions in glycolysis
The purpose of glycolysis is: - CORRECT ANSWER - To extract some energy from
glucose
What reactions occur in the mitochondria? - CORRECT ANSWER - -Citric Acid Cycle
-Electron Transport Chain
The molecules that enter the citric acid cycle are: - CORRECT ANSWER - Pyruvic acid
What is not a direct by-product of the citric acid cycle? - CORRECT ANSWER - Glucose
Which processes would be stopped if a poison interfered with ATP production? - CORRECT
ANSWER - -Exocytosis
-Active Transport
, Receptor sites on the outer surface of the plasma membrane are typically: - CORRECT
ANSWER - Proteins
What is the ONLY material that can freely pass through the plasma membrane without the need
of energy, receptors, carriers, etc.? - CORRECT ANSWER - Water
What property influences the cellular permeability of a particle? - CORRECT ANSWER -
-Solubility of the particle in lipid
-Size of the particle
Specialized pancreatic cells produce insulin. How do you think the cells would secrete this
product so that it can be used throughout the body? - CORRECT ANSWER - Exocytosis
What would not directly affect the rate of diffusion of a solute? - CORRECT ANSWER -
The flow rate of the cytosol inside the cell
Pump channels usually move ions: - CORRECT ANSWER - From a lower concentration
to a higher concentration of that ion
The membrane potential: - CORRECT ANSWER - Refers to a separation of charges
across the membrane or to a difference in the relative number of + and - charges in the ECF and
ICF
The axon hillock of a neuron is considered the: - CORRECT ANSWER - Triggering zone
What is a false statement regarding graded potentials? - CORRECT ANSWER - They are
self propagating
What is an incorrect description of a graded potential? - CORRECT ANSWER - It has a
refractory period
Questions and CORRECT Answers
Sweating is initiated in response to a rise in body temperature that occurs on exposure to a hot
environment. Evaporation of the sweat cools the body. This is an example of: - CORRECT
ANSWER - Negative feedback
A mechanism that "anticipates" a change in homeostasis in the body and makes adjustments is
termed a: - CORRECT ANSWER - Feedforward mechanism
Muscle cells contain numerous __________ because of their high demand for ATP: - CORRECT
ANSWER - Mitochondria
What is not considered a function of the Golgi complex? - CORRECT ANSWER -
Functions in glycolysis
The purpose of glycolysis is: - CORRECT ANSWER - To extract some energy from
glucose
What reactions occur in the mitochondria? - CORRECT ANSWER - -Citric Acid Cycle
-Electron Transport Chain
The molecules that enter the citric acid cycle are: - CORRECT ANSWER - Pyruvic acid
What is not a direct by-product of the citric acid cycle? - CORRECT ANSWER - Glucose
Which processes would be stopped if a poison interfered with ATP production? - CORRECT
ANSWER - -Exocytosis
-Active Transport
, Receptor sites on the outer surface of the plasma membrane are typically: - CORRECT
ANSWER - Proteins
What is the ONLY material that can freely pass through the plasma membrane without the need
of energy, receptors, carriers, etc.? - CORRECT ANSWER - Water
What property influences the cellular permeability of a particle? - CORRECT ANSWER -
-Solubility of the particle in lipid
-Size of the particle
Specialized pancreatic cells produce insulin. How do you think the cells would secrete this
product so that it can be used throughout the body? - CORRECT ANSWER - Exocytosis
What would not directly affect the rate of diffusion of a solute? - CORRECT ANSWER -
The flow rate of the cytosol inside the cell
Pump channels usually move ions: - CORRECT ANSWER - From a lower concentration
to a higher concentration of that ion
The membrane potential: - CORRECT ANSWER - Refers to a separation of charges
across the membrane or to a difference in the relative number of + and - charges in the ECF and
ICF
The axon hillock of a neuron is considered the: - CORRECT ANSWER - Triggering zone
What is a false statement regarding graded potentials? - CORRECT ANSWER - They are
self propagating
What is an incorrect description of a graded potential? - CORRECT ANSWER - It has a
refractory period
