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Ch. 4 BZ 101

Terms in this set (24)

Capsaicin, the chemical found in chili peppers, binds to a channel protein in pain receptors that, when activated, allows _______ ions to flow into the cell.
calcium
The _____________ serves to separate the internal environment of a cell from its external environment, allowing the cell to maintain homeostasis.
plasma membrane
Which type of protein would more likely be able to function as a channel through the plasma membrane?
integral
The plasma membrane is described as being selectively
permeable
Which of the following is true about diffusion?
Molecules exhibit net movement down the concentration gradient, moving from an area of high concentration to low.
Which structure controls the movement of substances into and out of the cell?
plasma membrane
Which type of protein would more likely function to stabilize and shape the plasma membrane?
Peripheral
A membrane that is permeable to only certain substances is said to be _____ permeable.
selectively
The movement of oxygen from high concentration in the alveoli of the lungs to the capillaries as shown in the image, is an example of ______.
diffusion
Diffusion is defined as the movement of molecules from _____ concentration to _____ concentration.
high/low
The most common configuration of a ____ is a solid solute and a liquid solvent.
solution
A solution contains both a ______ which is usually a solid, and a ______ which is usually a liquid.
Blank 1: solute
Blank 2: solvent
What is a solution that has the same solute concentration as another solution called?
isotonic
A solution that is equal in solute concentration to that of the cytoplasm of a cell and causes a cell to neither lose nor gain water by osmosis is a(n) _______ solution.
isotonic
What is a solution that has a lower solute concentration when compared to another solution called?
hypotonic
What is the general term for cellular disruption?
Cytolysis
A cell with an intracellular salt concentration of 0.5 M is placed into a solution which causes it to swell. What is a possible concentration of salt outside the cell?
0 M
The cytolysis of red blood cells is specifically called
hemolysis
Which of the following is a passive process, meaning it does not require cellular energy to move substances across the plasma membrane? (Mark all that apply)
Facilitated transport
Diffusion
Engulfment of a bacterium by a white blood cell occurs via
phagocytosis.
A(an) ______ junction is a cellular junction that has intracellular filaments mechanically connecting the cytoplasmic membrane of adjacent cells.
desmosome
Which layer of the plant cell wall contains cellulose fibrils?
primary cell wall
What type of cellular junction is a desmosome?
Adhesion junction
Which layer of the plant cell wall is abundant in pectins that function to hold cells together?
Middle lamella
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