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28 terms

Anatomy Chapter 3a

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This protein component of the cell membrane enables cell membranes increases the rate at which substrates are changed into products.
enzymes
Which of the following is a function of a membrane protein that binds with hormones and neurotransmitters?
receptors
This type of membrane protein helps to anchor proteins in the plasma membrane of neighboring cells to one another.
linkers
The characteristic of plasma membranes allowing only some substances to move through is known as
selective permeability
Which of the following does NOT influence the rate of diffusion?
amount of ATP available
This is the transport process by which dissolved gases move through a membrane.
simple diffusion
In this type of transport process, a solute, like the sugar, glucose, binds to a specific transporter protein on one side of the membrane and is released on the other side after the transporter protein undergoes a change in shape.
facilitated diffusion
In this transport process, the energy from ATP is used to drive substances across the membrane against their own concentration gradients.
primary active transport
If the solute concentration is greater in the solution on the inside of the cell, compared to the solute concentration of the solution that is outside of the cell, then what direction will water move?
into the cell
In this transport process, the energy stored in the Na+ or H+ concentration gradient is used to drive other substances across the membrane against their own concentration gradients.
secondary active transport
This is the transport process by which cells secrete materials, within membrane bound vesicles, into the extracellular fluid.
exocytosis
This is a transport process by which cells take up extracellular substances and package them within vesicles.
endocytosis
This is an extension of the plasma membrane that will surround a solid particle outside of the cell forming an endocytic vesicle containing that particle that is now inside a cell.
psuedopod
If the solute concentration in the solution on the outside of the cell, compared to the solute concentration of the solution that is inside the cell, then what direction will water move?
out of the cell
If the water concentration is greater on the inside of the cell, compared to the water concentration that is outside the cell , then what direction will water moee?
out of the cell
This specific type of endocytosis involves the formation of vesicles non-specifically taking up small amounts of water and dissolved solutes into the cell:
pinocytosis
Which of the following are ways that water molecules can pass through a membrane?
simple diffusion and aquaporin water channels
Vesicular movement involving endocytosis on one side of the cell and subsequent exocytosis on the opposite side of the cell
transcytosis
The endocytotic process in which a sampling of particulate matter is engulfed and brought into the cell is called
phagocytosis
The term used to describe the type of solution in which red blood cells water is
hypertonic
Osmosis always involves the diffusion of water and
membrane
This is the measure of a solutions ability to change the volume of cells by altering their water content.
tonicity
A membrane transporter assists in the transport of a sodium ion and a glucose molecule when a concentration of sodium ions is higher on the outside. This process of transport is best describes as:
symport
Without special transporters, which of the following substances would be permeable to a membrane?
small lipid soluble molecules
In this type of transport process, a solute, like glucose, binds to a specific transporter protein on one side of the membrane and is released on the other side involving the energy of ATP:
primary active transport
A red blood cell placed in pure water would:
swell and burst
Which of the following describes the plasma membrane?
a phospholipid bilayer surrounding the cell
Crenation is likely to occur in blood cells placed in:
a hypertonic solution