1. Active protein transporters which move substances from lower concentra- tion into higher

BIOS 251 WEEK 2

• Active protein transporters which move substances from lower concentra- tion into higher

concentration are known aschannels ligands transponders pumps –Answer pumps

• Primary active transport involves one substance moving down its con- centration

gradient to move another substance against its electrochemical gradient.True False –Answer False

• A protein transporter which moves two substances by secondary active transport in the

same direction is known as a symporter transponder antiporter inductor –Answer symporter

• Endocytosis is the inward movement of a large particle into the cell by means of

vesicular transport.True False –Answer True

• The transport of amino acids into the cell results when sodium ions move down their

electrical gradient and cause amino acids to move into the cell against their electrochemical gradient. This is an example of vesicular transport secondary active transport simple diffusion 1 / 2

primary active transport –Answer secondary active transport

• The process by which a cell produces extensions to engulf a particle or unwanted cell

so it is taken into the attacking cell is known as pinocytosis primary active transport

phagocytosis secondary active transport phagocytosis

• When a pouch forms in the cell membrane to enclose extracellular fluid in a vesicle in

order to transport that fluid into the cell, the process is known as exocytosis.True False –Answer False

• The movement of one substance into the cell by vesicular transport at the same rate

another substance is moved out of the cell also by vesicular transport, the process is known as vesicular reflex intracellular balance transcytosis maintenance of membrane integrity –Answer trancytosis

• In order to move calcium ions through the cell membrane, it is necessary to use the energy in

ATP. From what you know about active membrane transport, which type of transport is involved?secondary active transport

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