Bio E109, Bio E109 Exam Questions With Complete
Solutions
(answer 1) channels are critical for human hearing, where as
(answer 2) channels respond to neurotransmitters, and voltage-
gated channels are sensitive to changes in electrical activity
across a membrane. Correct Answers answer 1: Mechanically-
gated
answer 2: ligand-gated
answer 3: voltage-gated
1. ATP is hydrolyzed by the myosin head.
2. myosin creates a cross-bridge with a G-actin binding site.
3. [ Select ]
4. [ Select ]
5. [ Select ]
6. [ Select ] Correct Answers myosin creates a cross-bridge
with a G-actin binding site.
inorganic phosphate is released.
myosin pulls on the thin filament.
ADP is released.
myosin binds to ATP and releases from G-actin.
1. Elevated blood volume causes (answer 1).
2. Which prompts release of (answer 2).
3. This triggers (answer 3) in vessels leading to the glomeruli.
4. The (answer 4) blood flow to glomeruli (answer 5) the
filtration rate.
5. Ultimately leading to (answer 6) excretion of water. Correct
Answers 1. increased stress in atrial myocardial cells
2. atrial natriuretic peptides (ANP)
,3. vasodilation
4. The increased
5. increases
6. increased
1. High osmarity in the blood is sensed by (answer 1).
2. These receptor cells then (answer 2) and stimulate (answer 3)
3. The following depolarization of the cells causes the release of
(answer 4).
4. This hormone then increases (answer 5). Correct Answers
Answer 1: osmoreceptors in the hypothalamus
Answer 2: shrivel or shrink in size
Answer 3: mechanically -gated channels
Answer 4: vasopressin
Answer 5: reabsorption of water in the kidneys to maintain
water in the body
A carrier protein using secondary active transport hydrolyzes
ATP to move molecules against their concentration gradient.
T/F Correct Answers F
A cell containing 5M of glucose is placed in a solution
containing 5M of glucose. After one hour the cell contains 7.5
M of glucose and the solution contains 2.5M of glucose. What
process is likely to have occured? Correct Answers active
transport
a cellular response initiated by a G protein coupled receptor is
not likely to involve Correct Answers voltage gated ion
channels
,A contraction that generates constant force and moves a load is
known as [ Select ] , whereas one that generates force without
movement is known as [ Select ] Correct Answers isotonic
isometric
a metabolic disorder called hypokalemia results in abnormally
low K+ concentration is extracellular fluid. This condition will
Correct Answers make the resting membrane potential more
negative
a rapid spinal reflex Correct Answers regulates sensory afferent
input to the spinal cord
a session of exercise where active tissues require (answer 1)
oxygen than an individual's VO2max is considered (answer 2)
exercise. Correct Answers less; aerobic
A single molecule of MgCl2 dissolves into 3 particles (Mg++
and 2 Cl-) in solution.
What is the osmolarity (in OsM) of 5 moles of MgCl2? Correct
Answers 15
Above is the electromyocardiogram (ECG or EKG) taken from a
healthy patient.
Match the appropriate section of the ECG to the action of the
heart.
P
Between P and Q
Between S and T
, T to next P Correct Answers SA node depolarizes atria
atria contract
repolarization of atria and depolarization of ventricles
ventricles contract
atria and ventricular diastole
After perfusing the systemic tissues, the blood flows into the
veins where the flow speed (cm/s) increases , as it approaches
the heart due to the total cross-sectional area of the vessels .
Correct Answers veins
increases
the total cross-sectional area of the vessels
All connective tissue includes cells. Correct Answers True
All the end of expiration alveolar pressure will be Correct
Answers equal to atmospheric pressure
An adult ostrich has arterioles with the same diameter as the
aorta in hatchlings (young ostrich), although the adult's
arterioles has two time the length compared to the aorta of the
hatchling.
By what factor does the resistance to blood flow change from
hatchling's aorta and to the adult's arterioles? Correct Answers
Need Poiseuille's Law: R= (L*n)/r^4
R=L
=La/Ln = (2Ln)/(Ln) =2
Andrew has defective alpha receptors on his arterioles casing
him to be less responsive to norepinephrine. This might cause
chronic (answer 1) because his arterioles simply won't (answer
Solutions
(answer 1) channels are critical for human hearing, where as
(answer 2) channels respond to neurotransmitters, and voltage-
gated channels are sensitive to changes in electrical activity
across a membrane. Correct Answers answer 1: Mechanically-
gated
answer 2: ligand-gated
answer 3: voltage-gated
1. ATP is hydrolyzed by the myosin head.
2. myosin creates a cross-bridge with a G-actin binding site.
3. [ Select ]
4. [ Select ]
5. [ Select ]
6. [ Select ] Correct Answers myosin creates a cross-bridge
with a G-actin binding site.
inorganic phosphate is released.
myosin pulls on the thin filament.
ADP is released.
myosin binds to ATP and releases from G-actin.
1. Elevated blood volume causes (answer 1).
2. Which prompts release of (answer 2).
3. This triggers (answer 3) in vessels leading to the glomeruli.
4. The (answer 4) blood flow to glomeruli (answer 5) the
filtration rate.
5. Ultimately leading to (answer 6) excretion of water. Correct
Answers 1. increased stress in atrial myocardial cells
2. atrial natriuretic peptides (ANP)
,3. vasodilation
4. The increased
5. increases
6. increased
1. High osmarity in the blood is sensed by (answer 1).
2. These receptor cells then (answer 2) and stimulate (answer 3)
3. The following depolarization of the cells causes the release of
(answer 4).
4. This hormone then increases (answer 5). Correct Answers
Answer 1: osmoreceptors in the hypothalamus
Answer 2: shrivel or shrink in size
Answer 3: mechanically -gated channels
Answer 4: vasopressin
Answer 5: reabsorption of water in the kidneys to maintain
water in the body
A carrier protein using secondary active transport hydrolyzes
ATP to move molecules against their concentration gradient.
T/F Correct Answers F
A cell containing 5M of glucose is placed in a solution
containing 5M of glucose. After one hour the cell contains 7.5
M of glucose and the solution contains 2.5M of glucose. What
process is likely to have occured? Correct Answers active
transport
a cellular response initiated by a G protein coupled receptor is
not likely to involve Correct Answers voltage gated ion
channels
,A contraction that generates constant force and moves a load is
known as [ Select ] , whereas one that generates force without
movement is known as [ Select ] Correct Answers isotonic
isometric
a metabolic disorder called hypokalemia results in abnormally
low K+ concentration is extracellular fluid. This condition will
Correct Answers make the resting membrane potential more
negative
a rapid spinal reflex Correct Answers regulates sensory afferent
input to the spinal cord
a session of exercise where active tissues require (answer 1)
oxygen than an individual's VO2max is considered (answer 2)
exercise. Correct Answers less; aerobic
A single molecule of MgCl2 dissolves into 3 particles (Mg++
and 2 Cl-) in solution.
What is the osmolarity (in OsM) of 5 moles of MgCl2? Correct
Answers 15
Above is the electromyocardiogram (ECG or EKG) taken from a
healthy patient.
Match the appropriate section of the ECG to the action of the
heart.
P
Between P and Q
Between S and T
, T to next P Correct Answers SA node depolarizes atria
atria contract
repolarization of atria and depolarization of ventricles
ventricles contract
atria and ventricular diastole
After perfusing the systemic tissues, the blood flows into the
veins where the flow speed (cm/s) increases , as it approaches
the heart due to the total cross-sectional area of the vessels .
Correct Answers veins
increases
the total cross-sectional area of the vessels
All connective tissue includes cells. Correct Answers True
All the end of expiration alveolar pressure will be Correct
Answers equal to atmospheric pressure
An adult ostrich has arterioles with the same diameter as the
aorta in hatchlings (young ostrich), although the adult's
arterioles has two time the length compared to the aorta of the
hatchling.
By what factor does the resistance to blood flow change from
hatchling's aorta and to the adult's arterioles? Correct Answers
Need Poiseuille's Law: R= (L*n)/r^4
R=L
=La/Ln = (2Ln)/(Ln) =2
Andrew has defective alpha receptors on his arterioles casing
him to be less responsive to norepinephrine. This might cause
chronic (answer 1) because his arterioles simply won't (answer
