Human Physio- E109 Questions With Complete Solutions
A carrier protein using secondary active transport hydrolyzes
ATP to move molecules against their concentration gradient.. T
or F Correct Answers False. The electrochemical gradients set
up by primary active transport store energy, which can be
released as the ions move back down their gradients. Secondary
active transport uses the energy stored in these gradients to
move other substances against their own gradients.
A person lacking Bacteroides fragilis in their intestine can have
lower levels of _____, which can lead to autoimmune problems.
A. regulatory T-cells
B. regulatory beta-cells
C. amylase
D. inflammatory T-cells Correct Answers A. regulatory T-cells
Bacteroides fragilis makes regulatory T-cells
A person who eats infrequently takes a ______ maximizing
strategy towards digestion. We can expect such an individual to
have a _________ digestive tract, which would include
decreased release of _____.
A. rate; larger and more active; CCK
B. yield; smaller and less active; glucose-dependent
insulinotropic peptide (GIP)
C. yield; large and active; Ghrelin
D. wastage; smaller and more active; obestatin Correct Answers
B. yield; smaller and less active; glucose-dependent
insulinotropic peptide (GIP)
,yield maximizers get more out of their meal because they eat
infrequently. Their digestive tract is smaller and less active
because taking longer and GIP is a glucagon like peptide that
stimulates insulin secretion from pancreatic beta cells
Administering a patient Nitric Oxide would do what to their
blood pressure?
A. None of these answers are correct
B.Increase it
C. Cause a massive sympathetic response, thereby lowering their
blood pressure precipitously
D. Decrease it Correct Answers D. Decrease it
Nitric oxide is a vasodilator. Inc radius(volume) of the vessel
decreases pressure
- also a parasympathetic response would be triggered not
sympathetic
Al is having trouble breathing and feels "starved for air". If he
has low alveolar PO_2 and low levels of O2 in the blood, he
could have (select all that apply)
-Pulmonary Edema
-Fibrotic Lung Disease
-Asthma
-Emphysema Correct Answers -Asthma (constriction of the
bronchioles leads to low partial pressure of oxygen in the
allveoli)
-Emphysema (stiffening of the smooth muscle leads to low
partial pressures of oxygen in the alveoli ex. smoking)
,pulmonary edema has normal exchange surface but an inc in
diffusion distance from fluid collection
Fibrotic lung disease has normal Po2 in the alveoli but thick
mucus causes Po2 to be low in the blood
Amylase chops up starch into disaccharides known as _____.
This is then hydrolyzed to the monomeric glucose by ____.
A. cellobiose; cellobiase
B. tripeptides; amino acids
C. glycogen; glycogen phosphorylase
D. maltose; alpha-glucosidase (maltase) Correct Answers D.
maltose; alpha-glucosidase (maltase)
As a wave of action potential travels from the atria to the
ventricles, it is momentarily delayed as a result of slow
conduction through what?
A. Purkinje fibers
B. The AV node
C. The left and right bundle branches Correct Answers The AV
node
The AV node slows the impulse conduction to allow sufficient
time for complete atrial depolarization and contraction (systole)
prior to ventricular depolarization and contraction
As discussed in lectures this week, what is the real precursor of
type 2 diabetes?
A. a high fat diet
B. already being obese
, C. dyslipidemia caused by the liver being overloaded and
synthesizing too much fat (VLDL)
D. the lack of exercise Correct Answers C. dyslipidemia
caused by the liver being overloaded and synthesizing too much
fat (VLDL)
Assume that two muscles are equal in cross-sectional area, but
muscle B is 4-times as long as muscle A.
What is the ratio of (contraction speed of A)/(contraction speed
of B)?
Enter your answer in decimal notation (e.g. 44, or 0.44, not 1/4)
without units. Correct Answers .25
Assume that two muscles equal in length, but muscle B has 4
times the radius of muscle A. By what factor is the maximum
force of B greater than A?
Enter your answer in decimal notation (e.g. 44, or 0.44, not 1/4)
without units. Correct Answers 16
Math: Muscle force is proportional to the cross-sectional area
(pi*R^2) and NOT to muscle length, so F = k*pi*R^2, where k
is a constant.
Therefore,
forceB/forceA= kπ(4R)^2 / kπR^2 = 16
Blood flowing out of the right ventricle enters the right atrium.
True
False Correct Answers False
right atrium to right ventricle through semilunar valve to
pulmonary artery
A carrier protein using secondary active transport hydrolyzes
ATP to move molecules against their concentration gradient.. T
or F Correct Answers False. The electrochemical gradients set
up by primary active transport store energy, which can be
released as the ions move back down their gradients. Secondary
active transport uses the energy stored in these gradients to
move other substances against their own gradients.
A person lacking Bacteroides fragilis in their intestine can have
lower levels of _____, which can lead to autoimmune problems.
A. regulatory T-cells
B. regulatory beta-cells
C. amylase
D. inflammatory T-cells Correct Answers A. regulatory T-cells
Bacteroides fragilis makes regulatory T-cells
A person who eats infrequently takes a ______ maximizing
strategy towards digestion. We can expect such an individual to
have a _________ digestive tract, which would include
decreased release of _____.
A. rate; larger and more active; CCK
B. yield; smaller and less active; glucose-dependent
insulinotropic peptide (GIP)
C. yield; large and active; Ghrelin
D. wastage; smaller and more active; obestatin Correct Answers
B. yield; smaller and less active; glucose-dependent
insulinotropic peptide (GIP)
,yield maximizers get more out of their meal because they eat
infrequently. Their digestive tract is smaller and less active
because taking longer and GIP is a glucagon like peptide that
stimulates insulin secretion from pancreatic beta cells
Administering a patient Nitric Oxide would do what to their
blood pressure?
A. None of these answers are correct
B.Increase it
C. Cause a massive sympathetic response, thereby lowering their
blood pressure precipitously
D. Decrease it Correct Answers D. Decrease it
Nitric oxide is a vasodilator. Inc radius(volume) of the vessel
decreases pressure
- also a parasympathetic response would be triggered not
sympathetic
Al is having trouble breathing and feels "starved for air". If he
has low alveolar PO_2 and low levels of O2 in the blood, he
could have (select all that apply)
-Pulmonary Edema
-Fibrotic Lung Disease
-Asthma
-Emphysema Correct Answers -Asthma (constriction of the
bronchioles leads to low partial pressure of oxygen in the
allveoli)
-Emphysema (stiffening of the smooth muscle leads to low
partial pressures of oxygen in the alveoli ex. smoking)
,pulmonary edema has normal exchange surface but an inc in
diffusion distance from fluid collection
Fibrotic lung disease has normal Po2 in the alveoli but thick
mucus causes Po2 to be low in the blood
Amylase chops up starch into disaccharides known as _____.
This is then hydrolyzed to the monomeric glucose by ____.
A. cellobiose; cellobiase
B. tripeptides; amino acids
C. glycogen; glycogen phosphorylase
D. maltose; alpha-glucosidase (maltase) Correct Answers D.
maltose; alpha-glucosidase (maltase)
As a wave of action potential travels from the atria to the
ventricles, it is momentarily delayed as a result of slow
conduction through what?
A. Purkinje fibers
B. The AV node
C. The left and right bundle branches Correct Answers The AV
node
The AV node slows the impulse conduction to allow sufficient
time for complete atrial depolarization and contraction (systole)
prior to ventricular depolarization and contraction
As discussed in lectures this week, what is the real precursor of
type 2 diabetes?
A. a high fat diet
B. already being obese
, C. dyslipidemia caused by the liver being overloaded and
synthesizing too much fat (VLDL)
D. the lack of exercise Correct Answers C. dyslipidemia
caused by the liver being overloaded and synthesizing too much
fat (VLDL)
Assume that two muscles are equal in cross-sectional area, but
muscle B is 4-times as long as muscle A.
What is the ratio of (contraction speed of A)/(contraction speed
of B)?
Enter your answer in decimal notation (e.g. 44, or 0.44, not 1/4)
without units. Correct Answers .25
Assume that two muscles equal in length, but muscle B has 4
times the radius of muscle A. By what factor is the maximum
force of B greater than A?
Enter your answer in decimal notation (e.g. 44, or 0.44, not 1/4)
without units. Correct Answers 16
Math: Muscle force is proportional to the cross-sectional area
(pi*R^2) and NOT to muscle length, so F = k*pi*R^2, where k
is a constant.
Therefore,
forceB/forceA= kπ(4R)^2 / kπR^2 = 16
Blood flowing out of the right ventricle enters the right atrium.
True
False Correct Answers False
right atrium to right ventricle through semilunar valve to
pulmonary artery
