CO OZNACZA SŁOWO ACTIVE TRANSPORT
Transport aktywny
Aktywny transport to ruch cząsteczek przez błonę komórkową w kierunku przeciwnym do ich gradientu stężenia, tzn. Przemieszczanie się z małego stężenia do dużego stężenia. Aktywny transport jest zwykle związany z gromadzeniem się wysokich stężeń cząsteczek, których potrzebuje komórka, takich jak jony, glukoza i aminokwasy. Jeśli proces wykorzystuje energię chemiczną, taką jak trifosforan adenozyny, jest to podstawowy transport czynny. Drugorzędny transport czynny obejmuje zastosowanie gradientu elektrochemicznego. Aktywny transport wykorzystuje energię komórkową, w przeciwieństwie do pasywnego transportu, która nie wykorzystuje energii komórkowej. Aktywny transport jest dobrym przykładem procesu, w którym komórki wymagają energii. Przykłady aktywnego transportu obejmują pobieranie glukozy w jelitach u ludzi i pobieranie jonów mineralnych do komórek włosowatych korzeni roślin.
Definicja słowa active transport w słowniku
Definicja aktywnego transportu w słowniku jest procesem, w którym molekuły mogą przejść przez membranę z regionu, w którym znajdują się w niskim stężeniu, do jednego z wysokich stężeń; to wymaga wydatkowania energii w metabolizmie i jest wspomagane przez białka nośnikowe, powszechnie określane jako pompy.
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1
Biology Coloring Workbook
chapter. 2-6: Active. Transport. and. Endocytosis. Active Transport and
Endocytosis O ATP Molecule E O ADP Molecule F O Phosphate Ion G O Particles
H n < fD o -3 QJ Z5 oo O -5. The cell membrane encloses the cell, forming a
barrier that ...
2
Molecular Biology of Membrane
Transport Disorders
ATP-dependent transporters are shown as closed circles, other transporters as
open squares. put this finding into a proper perspective, a short discussion of
active transport processes is necessary. 26.3. ACTIVE TRANSPORT The
transport of ...
3
Basic Principles of Membrane
Transport
Active transport The effect of superimposing an active transport process on a
simple diffusional process depends on the characteristics of the former. In the
simplest case if /' is actively transported from compartment o to compartment / (
see ...
4
Color Atlas of Physiology
26 Active Transport 01 o Q- <u U c 01 Active transport occurs in many parts of the
body when solutes are transported against their concentration gradient (uphill
transport) and/or, in the case of ions, against an electrical potential (-» p. 22).
Stefan Silbernagl, Agamemnon Despopoulos,
2009
5
Seaweed Ecology and Physiology
However, in contrast to active-transport mechanisms, any energy expenditure
required for transport must be indirect. More recently, ion channels (Fig. 5.3a),
which are macromolecular pores that traverse the cell membrane, have been
invoked ...
Christopher S. Lobban,
1994
6
protons, electrons, phosphorylation and
active transport
(szent-gyorgi) The processes which result in secretion of ions as hydrochloric
acid in the stomach or accumulation of ions in the vacuoles of plant cells are
termed 'active transport' mechanisms. 'Active transport' was a term used by
Ussing in ...
A y OBJECTIVES By the end of this spread you should be able to: • describe the
process of active transport • distinguish between endocytosis and exocytosis.
Fact of life Seaweeds can concentrate inside themselves trace metals that are ...
8
Int Std Ed-General Biology
Many substances are pushed across membranes against their concentration
gradients by active transport "pumps." Active transport concentrates molecules
such as sugars and amino acids inside cells and pushes ions in or out of cells.
Paul E. Hertz, Cecie Starr, Peter Russell, Beverly McMillan, Stephen L. Wolfe, Peter Russell,
2008
List the characteristics of active transport. • Substances are moved against their
electrochemical gradient. • The exchange of substances requires a transport
protein. • The process is rate-limiting and saturable. • The breakdown of
adenosine ...
conditions satisfied active transport of substrate will occur. Many, many cases of
such active transport by countertransport are known in biology and will be dealt
with in later sections of this treatise. Common driven substrates are metabolites ...
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «ACTIVE TRANSPORT»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
active transport w wiadomościach.
Health and wellbeing are at the heart of our Green future
But it turns out the opportunity is enormous - do many of the things that we need to do to create a healthier society, encourage active transport, ... «The Ecologist, Lip 15»
Spectral-domain optical coherence tomography analysis of …
... of persistent SRF may represent areas of residual RPE dysfunction (eg, decreased phagocytotic activity and/or active transport of ions). «Nature.com, Lip 15»
Corium International Upgraded by Zacks to Hold (CORI)
... technology for active delivery of proteins, peptides and vaccines large molecules that require active transport through the skin, and Corplex, ... «Dakota Financial News, Lip 15»
Climate change is a 'medical emergency'
... while active transport (walking and cycling) can cut pollution and road traffic accidents, and reduces rates of obesity, diabetes, coronary heart ... «Irish Medical Times, Lip 15»
Public transport 'failing older people' – what can be done?
Equally, turning other 'active transport' types, like walking, into a social activity with the help of volunteers, would encourage more elderly ... «Hartlepool Mail, Cze 15»
Public Transport in right direction – Len Brown
"Our council is now spending 50 percent of its transport funding on public transport and active transport. The Government is heading towards ... «3News NZ, Cze 15»
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... in Brunswick would give more than 80 children from Northcote zoned to attend Brunswick East Primary School a safe active transport option. «Herald Sun, Cze 15»
City identifies locations for crosswalk upgrades
In keeping with the city's strategy to make Edmonton's streets more friendly to various modes of active transport – such as bicycling and walking ... «Edmonton Sun, Cze 15»
Drink Up: 4 Unexpected Ingredients With Health Benefits
... of iron, which carries oxygen from the lungs throughout our bodies, and magnesium, which plays a role in the active transport of calcium and ... «Tech Times, Cze 15»
Climate Changes May Eradicate 50 Years Of World Health Progress …
... heat and power generation in health facilities, decentralisation of care and promotion of active transport, and low-carbon healthy lifestyles. «CleanTechnica, Cze 15»