CSCC: Physiology EXAM ONE UPDATED
Exam Questions and CORRECT Answers
Tonicity - CORRECT ANSWER - concentration of solvents
Passive mechanisms of transport - CORRECT ANSWER - high to low, does NOT need
ATP
Example: Osmosis, Diffusion, Facilitated Diffusion
Active mechanism of transport - CORRECT ANSWER - "up hill" *Thats why it needs the
energy and pump for help*
low to high, does need ATP, uses proteins or pumps
Example: Primary and Secondary
Primary active transport - CORRECT ANSWER - Use ATP (and a pump) to move a
protein
Secondary active transport - CORRECT ANSWER - "coupled transport"
moving sodium back into the cell, ATP is used
What factors influence the rate of diffusion - CORRECT ANSWER - temp (hot speeds,
cold slows)
molecular mass (small speeds, large slows)
number of carriers (the more carriers, the faster)
concentration gradient (the more, the slower)
solubility (lipid soluble is faster)
surface area (the more surface area, diffusion increases)
, Osmosis - CORRECT ANSWER - diffusion of water, from low concentration of solutes, to
high
How do you calculate the osmolarity of solution when given the molarity? - CORRECT
ANSWER - multiply the molarity by the number of solutes
Hyper tonic - CORRECT ANSWER - H2O moves out of cell, and crenates
More than 0.3 Osmoles
Hypo tonic - CORRECT ANSWER - H2O moves into the cell, and lyses
Less than 0.3 Osmoles
Isotonic - CORRECT ANSWER - equilibrium, =0.3 Osmoles
Non penetrating solutes - CORRECT ANSWER - do not go through the semi permeable
membrane
Nodes of Ranvier - CORRECT ANSWER - space between myelin sheath, jumps from one
to another; thus speeding us the axons signal
Axon terminal/ Synaptic end bulbs - CORRECT ANSWER - responsible for releasing the
neurotransmitter into synapse
Neurotransmitter - CORRECT ANSWER - chemical messenger between cells
Resting membrane potential - CORRECT ANSWER - -70 mV, When the cell is at rest.
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Exam Questions and CORRECT Answers
Tonicity - CORRECT ANSWER - concentration of solvents
Passive mechanisms of transport - CORRECT ANSWER - high to low, does NOT need
ATP
Example: Osmosis, Diffusion, Facilitated Diffusion
Active mechanism of transport - CORRECT ANSWER - "up hill" *Thats why it needs the
energy and pump for help*
low to high, does need ATP, uses proteins or pumps
Example: Primary and Secondary
Primary active transport - CORRECT ANSWER - Use ATP (and a pump) to move a
protein
Secondary active transport - CORRECT ANSWER - "coupled transport"
moving sodium back into the cell, ATP is used
What factors influence the rate of diffusion - CORRECT ANSWER - temp (hot speeds,
cold slows)
molecular mass (small speeds, large slows)
number of carriers (the more carriers, the faster)
concentration gradient (the more, the slower)
solubility (lipid soluble is faster)
surface area (the more surface area, diffusion increases)
, Osmosis - CORRECT ANSWER - diffusion of water, from low concentration of solutes, to
high
How do you calculate the osmolarity of solution when given the molarity? - CORRECT
ANSWER - multiply the molarity by the number of solutes
Hyper tonic - CORRECT ANSWER - H2O moves out of cell, and crenates
More than 0.3 Osmoles
Hypo tonic - CORRECT ANSWER - H2O moves into the cell, and lyses
Less than 0.3 Osmoles
Isotonic - CORRECT ANSWER - equilibrium, =0.3 Osmoles
Non penetrating solutes - CORRECT ANSWER - do not go through the semi permeable
membrane
Nodes of Ranvier - CORRECT ANSWER - space between myelin sheath, jumps from one
to another; thus speeding us the axons signal
Axon terminal/ Synaptic end bulbs - CORRECT ANSWER - responsible for releasing the
neurotransmitter into synapse
Neurotransmitter - CORRECT ANSWER - chemical messenger between cells
Resting membrane potential - CORRECT ANSWER - -70 mV, When the cell is at rest.
More negative inside
