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BMS 595 Human Physiology Exam I - Terminology Questions and Answers 100% Accurate
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BMS 595 Human Physiology Exam I - Terminology
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BMS 595 Human Physiology Exam I -Terminology
Passive Transport - answer No energy requirement; diffusion, facilitated diffusion,
filtration, and osmosis
Active Transport - answer Against concentration gradient and needs carrier.
Bulk transport- Exocytosis, endocytosis, phagocytosis, and pinocytosis
Simple diffusion - answer always happens in favor of [] gradient based on kinetic energy
of molecules causing their movement through membrane openings or intermolecular
spaces.
Flicks Law of Diffusion - answer net rate of diffusion C.A.AS.T/R
c- diffusion coefficient
A= cross sectional area
AS= concentration gradient
T =temperature
R = molecular radius
Facilitated Diffusion - answerIn favor of concentration gradient carrier. There is a max
limit depending on the carriers and their ability to undergo conformational changes.
Osmosis - answerMovement of solvent
Filtration - answerMovement of solvent and solute due to hydrostatic pressure gradient
Active Transport - answerCarrier typically a lipoprotein that binds to the substance
transport to other sides. Then, the enzymes breaks the complex, and lipid insoluble
substance cannot go back following concentration gradient. The carrier goes back to
pick another substance. It is limited transport and against the concentration gradient.
Na/K pump.
Bulk Transport; Endocytosis - answerPhagocytosis for solids
Pinocytosis - answerfor liquid
Exocytosis - answerto secret ore excrete substance from the cell.
, Osmotic Pressure - answerFor a given solution, the exact amount of pressure required
to stop osmosis. It depends on the numbers of particles.- one osmole is one gram for
MW of undissociated solute; glucose.1 osmole = 1g MW = 180g of glucose.
One mole of a substance is_____ - answerequal to its MW in grams.
osmoles____ - answeralways the same number of solute particles
What is the Osmolality? - answera solution that has 1 oslmole of solute dissolved in
each kg of water- 1 osmolality of 1 osmole /kg
What is the normal osmolality of ECF an ICF? - answer300 milliosmoles/kg or 300,000
osmole/liter
Osmotic pressure of human body - answer300 body fluid X osmotic pressure in
milliosomole.
Formula of Osmolarity - answerOSM/L = (g/L solute x OSM/mole) / GMW
Why are we using osmolality instead of osmolarity? - answerOsmolarity is not practical
to measure solutions in kg of water.
Tonicity - answerThe ability of a solution to change the tone or shape of cells by altering
their internal H2O value.
Membrane potential - answerArises from the interactions of ion channels and ion pumps
embedded in the membrane producing different concentrations of electrically charged
ions on the intracellular and extracellular sides of the membrane.
2 function of membrane potential - answer1. Battery for power operation
2. Neurons and muscle cells used for transmission from the excitable characteristic.
Definition of Signals - answerGenerated by opening or closing of ion channel at one
point in the membrane producing a local change in the membrane potential that causes
electric current to flow rapidly to other points in the membrane.
Resting potential - answerthe time that the membrane potential of a cell can go for a
long period time without changing significantly.
Both non excitable and excitable cells existed in the absence of excitation.
Characteristics of Action Potential - answer1. All or nothing
2. The frequency of Action potential determined by intensity of a stimulus
3. Larger current do not create larger action potentials
4. Amplitude of AP is independent of the amount of current produced.
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