PHYSIOLOGY EXAM 1 (EEOB 2520 OSU)
WITH 100% APPROVED SOLUTIONS
2026/2027 STUDY SET
EQUATION 1?
ATP <-> ADP + Pi + ENERGY (reversible)
WHAT IS EQUATION 1 USED FOR?
Our currency to pay for activities (energy; like spending dollar bills)
EQUATION 2?
Glucose + O2 + ADP + Pi -> ATP + CO2 + H2O + heat
WHAT IS EQUATION 2 USED FOR?
How we make currency (energy; like earning money)
EQUATION 3?
CO2 + H2O <-> HCO3- + H+ (reversible)
WHAT IS EQUATION 3 USED FOR?
Transport a gas in water
EQUATION 4?
Hb + O2 <-> HbO2
WHAT IS EQUATION 4 USED FOR?
Oxygen binding and transport in blood
EQUATION 5?
Ca2+ + troponin <-> Ca2+-troponin complex
WHAT IS EQUATION 5 USED FOR?
Initiate muscle contraction
,1. Which of the following best describes homeostasis?
A) Maintaining a fixed internal environment
B) Dynamic stability of internal conditions
C) Energy production from glucose
D) Transport of gases in blood
B) Dynamic stability of internal conditions
2. The majority of ATP in a cell is produced in which organelle?
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Golgi apparatus
C) Mitochondrion
3. Which ion is primarily responsible for depolarization of a neuron?
A) K+
B) Cl-
C) Na+
D) Ca2+
C) Na+
4. Resting membrane potential is closest to which value?
A) +30 mV
B) 0 mV
C) -70 mV
D) -90 mV
C) -70 mV
5. Which of the following is an example of negative feedback?
A) Blood clotting
B) Childbirth contractions
C) Regulation of blood glucose by insulin
, D) Action potential propagation
C) Regulation of blood glucose by insulin
6. In the absence of oxygen, pyruvate is converted to:
A) Acetyl-CoA
B) Lactate
C) Citrate
D) Oxaloacetate
B) Lactate
7. During intense exercise, muscle cells switch to:
A) Aerobic respiration only
B) Fermentation
C) Beta-oxidation
D) Gluconeogenesis
B) Fermentation
8. The sodium-potassium pump transports:
A) 3 Na+ out, 2 K+ in (ATP used)
B) 2 Na+ out, 3 K+ in
C) 1 Na+ out, 1 K+ in
D) 3 K+ out, 2 Na+ in
A) 3 Na+ out, 2 K+ in (ATP used)
9. Osmosis is the movement of:
A) Solutes down concentration gradient
B) Water across a semipermeable membrane
C) Ions through channels
D) Glucose via facilitated diffusion
B) Water across a semipermeable membrane
WITH 100% APPROVED SOLUTIONS
2026/2027 STUDY SET
EQUATION 1?
ATP <-> ADP + Pi + ENERGY (reversible)
WHAT IS EQUATION 1 USED FOR?
Our currency to pay for activities (energy; like spending dollar bills)
EQUATION 2?
Glucose + O2 + ADP + Pi -> ATP + CO2 + H2O + heat
WHAT IS EQUATION 2 USED FOR?
How we make currency (energy; like earning money)
EQUATION 3?
CO2 + H2O <-> HCO3- + H+ (reversible)
WHAT IS EQUATION 3 USED FOR?
Transport a gas in water
EQUATION 4?
Hb + O2 <-> HbO2
WHAT IS EQUATION 4 USED FOR?
Oxygen binding and transport in blood
EQUATION 5?
Ca2+ + troponin <-> Ca2+-troponin complex
WHAT IS EQUATION 5 USED FOR?
Initiate muscle contraction
,1. Which of the following best describes homeostasis?
A) Maintaining a fixed internal environment
B) Dynamic stability of internal conditions
C) Energy production from glucose
D) Transport of gases in blood
B) Dynamic stability of internal conditions
2. The majority of ATP in a cell is produced in which organelle?
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Golgi apparatus
C) Mitochondrion
3. Which ion is primarily responsible for depolarization of a neuron?
A) K+
B) Cl-
C) Na+
D) Ca2+
C) Na+
4. Resting membrane potential is closest to which value?
A) +30 mV
B) 0 mV
C) -70 mV
D) -90 mV
C) -70 mV
5. Which of the following is an example of negative feedback?
A) Blood clotting
B) Childbirth contractions
C) Regulation of blood glucose by insulin
, D) Action potential propagation
C) Regulation of blood glucose by insulin
6. In the absence of oxygen, pyruvate is converted to:
A) Acetyl-CoA
B) Lactate
C) Citrate
D) Oxaloacetate
B) Lactate
7. During intense exercise, muscle cells switch to:
A) Aerobic respiration only
B) Fermentation
C) Beta-oxidation
D) Gluconeogenesis
B) Fermentation
8. The sodium-potassium pump transports:
A) 3 Na+ out, 2 K+ in (ATP used)
B) 2 Na+ out, 3 K+ in
C) 1 Na+ out, 1 K+ in
D) 3 K+ out, 2 Na+ in
A) 3 Na+ out, 2 K+ in (ATP used)
9. Osmosis is the movement of:
A) Solutes down concentration gradient
B) Water across a semipermeable membrane
C) Ions through channels
D) Glucose via facilitated diffusion
B) Water across a semipermeable membrane
