Human Physio- E109 Question and
answers verified to pass 2025
Multiple types of ___ tissue include collagen fibers, which provide stiffness
and elasticity. ___tissue is largely composed of extracellular components ,
such as ground substance, whereas transport ___ tissue functions by
transporting molecules through cells. - correct answer Connective
connective
epithelial
Local anesthetic, like novocaine or lidocaine used by the dentist, work by local
diffusion to nearby neurons when injected. What happens to the center of
concentration and the maximum concentration over time, after injection?
Select all that apply
- the center of concentration does not move
-The maximum concentration reduces
- the center of concentration moves
- the maximum concentration remains the same - correct answer - the center
of concentration does not move
-The maximum concentration reduces
False statements made true:
Which of the following are driving forces for the motion of molecules across
membranes? Select all that apply
- Elastic
-gravity
-Chemical diffusion
,-colloid osmotic pressure
-electromotive force - correct answer -Chemical diffusion
-colloid osmotic pressure
-electromotive force
Match the following characteristics to either carrier, channel membrane
proteins, or both
Change conformation: __
Allow ions to leak:__
transmembrane protein:___ - correct answer Change conformation: Carrier
protein
Allow ions to leak: Channel protein
Transmembrane protein: Both
What does homeostasis in body temperature suggest?
A. That your body temperature never changes
B. That your body temperature never remains constant
C. That your physiology tries to maintain body temperature against
perturbations from activity - correct answer C
Which of the following statements is TRUE about a population of uncharged
particles in a solution. Select all that apply
- The center of the population remains constant
-The rate of expansion increases with temperature
-Particles tend to move toward other particles
,-the edges of the population expand over time - correct answer - The center
of the population remains constant
-The rate of expansion increases with temperature
-the edges of the population expand over time
Which of the following statements are true of molecular diffusion?
- The spatial distribution. of particles remains. the. same over. time
-The rate of motion depends on temperature
-Individual particles in solution move. in random direction - correct answer -
The rate of motion depends on temperature
-Individual particles in solution move in random direction
False. statement made true: Spatial distribution of particles changes over time
Your blood is rich in dissolved proteins, but the interstitial space around your
capillaries is devoid of proteins. The capillary walls are thin and permeable to
water. If blood pressure were negligible, what would you predict about the
exchange of water between the blood and interstitial fluid?
A. Water should move from blood to the interstitial fluid
B. There is no reason for water to move between blood and interstitial fluid.
C. Water should move from the interstitial fluid to the blood. - correct answer
C
Note: That is what is favored by the colloid osmotic pressure
Imagine the rate of diffusion for a molecule that fluxes across a 1mm x 1mm
area of membrane is 5 Moles/s and the membrane has a thickness of 10 nm.
What rate of diffusion (in Moles/s) would you predict if the molecular size were
to double? - correct answer 2.5
, Math:
the rate of diffusion for a molecule that fluxes across a 1mm x 1mm area of
membrane is 5 Moles/s and the membrane has a thickness of 10 nm.
What rate of diffusion (in Moles/s) would you predict if the molecular size were
to double? - correct answer 0.5
Note: According to Fick's Law, the rate of diffusion is inversely proportional to
membrane thickness. So, a 2-fold increase in thickness generates a 1/2
change in the rate of diffusion. In other words, the final rate = (1/2) * (the initial
rate).
Select all of the following TRUE statements.
- Ground substance may be a liquid.
-All connective tissue includes cells.
-Adipose tissue has a crystalized matrix. - correct answer - Ground substance
may be a liquid.
-All connective tissue includes cells.
False statement made. true: Adipose tissue...
Ground substance may be a liquid. T or F - correct answer True. Plasma is a
liquid ground substance
What would happen if Na+ -K+ ATPase stopped working in a digestive
epithelial cell? Select all the apply
- [Glu] in the cell would begin to decrease.
-[K+] would decrease in the interstitial fluid
-[Na+] in the cell would begin to increase.
answers verified to pass 2025
Multiple types of ___ tissue include collagen fibers, which provide stiffness
and elasticity. ___tissue is largely composed of extracellular components ,
such as ground substance, whereas transport ___ tissue functions by
transporting molecules through cells. - correct answer Connective
connective
epithelial
Local anesthetic, like novocaine or lidocaine used by the dentist, work by local
diffusion to nearby neurons when injected. What happens to the center of
concentration and the maximum concentration over time, after injection?
Select all that apply
- the center of concentration does not move
-The maximum concentration reduces
- the center of concentration moves
- the maximum concentration remains the same - correct answer - the center
of concentration does not move
-The maximum concentration reduces
False statements made true:
Which of the following are driving forces for the motion of molecules across
membranes? Select all that apply
- Elastic
-gravity
-Chemical diffusion
,-colloid osmotic pressure
-electromotive force - correct answer -Chemical diffusion
-colloid osmotic pressure
-electromotive force
Match the following characteristics to either carrier, channel membrane
proteins, or both
Change conformation: __
Allow ions to leak:__
transmembrane protein:___ - correct answer Change conformation: Carrier
protein
Allow ions to leak: Channel protein
Transmembrane protein: Both
What does homeostasis in body temperature suggest?
A. That your body temperature never changes
B. That your body temperature never remains constant
C. That your physiology tries to maintain body temperature against
perturbations from activity - correct answer C
Which of the following statements is TRUE about a population of uncharged
particles in a solution. Select all that apply
- The center of the population remains constant
-The rate of expansion increases with temperature
-Particles tend to move toward other particles
,-the edges of the population expand over time - correct answer - The center
of the population remains constant
-The rate of expansion increases with temperature
-the edges of the population expand over time
Which of the following statements are true of molecular diffusion?
- The spatial distribution. of particles remains. the. same over. time
-The rate of motion depends on temperature
-Individual particles in solution move. in random direction - correct answer -
The rate of motion depends on temperature
-Individual particles in solution move in random direction
False. statement made true: Spatial distribution of particles changes over time
Your blood is rich in dissolved proteins, but the interstitial space around your
capillaries is devoid of proteins. The capillary walls are thin and permeable to
water. If blood pressure were negligible, what would you predict about the
exchange of water between the blood and interstitial fluid?
A. Water should move from blood to the interstitial fluid
B. There is no reason for water to move between blood and interstitial fluid.
C. Water should move from the interstitial fluid to the blood. - correct answer
C
Note: That is what is favored by the colloid osmotic pressure
Imagine the rate of diffusion for a molecule that fluxes across a 1mm x 1mm
area of membrane is 5 Moles/s and the membrane has a thickness of 10 nm.
What rate of diffusion (in Moles/s) would you predict if the molecular size were
to double? - correct answer 2.5
, Math:
the rate of diffusion for a molecule that fluxes across a 1mm x 1mm area of
membrane is 5 Moles/s and the membrane has a thickness of 10 nm.
What rate of diffusion (in Moles/s) would you predict if the molecular size were
to double? - correct answer 0.5
Note: According to Fick's Law, the rate of diffusion is inversely proportional to
membrane thickness. So, a 2-fold increase in thickness generates a 1/2
change in the rate of diffusion. In other words, the final rate = (1/2) * (the initial
rate).
Select all of the following TRUE statements.
- Ground substance may be a liquid.
-All connective tissue includes cells.
-Adipose tissue has a crystalized matrix. - correct answer - Ground substance
may be a liquid.
-All connective tissue includes cells.
False statement made. true: Adipose tissue...
Ground substance may be a liquid. T or F - correct answer True. Plasma is a
liquid ground substance
What would happen if Na+ -K+ ATPase stopped working in a digestive
epithelial cell? Select all the apply
- [Glu] in the cell would begin to decrease.
-[K+] would decrease in the interstitial fluid
-[Na+] in the cell would begin to increase.
