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30 terms

Practice Ch.1-4

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cytosol
The clear, structureless gel in a cell is its
transmembrane protein
The Na⁺-K⁺ pump is
active transport
Which of the following processes could occur only in the plasma membrane of a living cell?
microvilli
Cells specialized for absorption of matter from the ECF are likely to show an abundance of
osmosis
Aquaporins are transmembrane proteins that promote
do not chemically change their ligands
Membrane carriers resemble enzymes except for the fact that carriers
Na⁺ concentration gradient
The cotransport of glucose derives energy from
to bind to the first messenger
The function of cAMP in a cell is
endoplasmic reticulum
Most cellular membranes are made by
pinocytosis
Matter can leave a cell by any of the following means except
micrometers
Most human cells are 10 to 15 ____ in diameter.
second messenger
When a hormone cannot enter a cell, it activates the formation of a/an ____ inside the cell.
voltage-regulated
gates in the plasma membrane open or close in response to changes in the electrical charge difference across the membrane.
hydrostatic pressure
The force exerted on a membrane by water is called ___.
hypertonic
A concentrated solution that causes a cell to shrink is ___ to the cell.
exocytosis
Fusion of a secretory vesicle with the plasma membrane, and release of the vesicle's contents, is called ____.
nucleus, mitochondria
Tow organelles that are surrounded by a double unit membrane are the ____ and the ____.
smooth ER, peroxisomes
Liver cells can detoxify alcohol with two organelles, the ___ and ____.
ligand-regulated gate
An ion gate in the plasma membrane that opens or closes when a chemical binds to it is called a/an ____.
cisterna
The space enclosed by the unit membrane of the Golgi complex and endoplasmic reticulum is called the ____.
phospholipid-molecules
The plasma membrane consists primarily of _____.
microvilli
The brush border is composed of ____.
osmosis does not require ATP
If a cell were poisoned so it could not make ATP, osmosis through its membrane would _____.
active transport
Material can move either into or out of a cell by means of ____.
activate enzymes in the cell
A cell's second messengers serve mainly to _____
lysosomes
The Golgi complex makes _____ but not peroxisomes.
transmembrane protein
A channel could not move material from the outside of a cell to the inside unless it extended all the way across the membrane
isotonic
Human cells swell or shrink in any solution other than an _____ one.
osmosis
_____is not limited by the transport maximum (Tm).
ribosomes
It is very unlikely for a cell to have more centrosomes than _____.