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Flashcards in Chapter 5 Deck (17):
1

Because water can move freely between the compartments of the body they are considered to be in what?

Osmotic Equilibrium

2

Define osmosis

The movement of water across a membrane due to concentration gradients

3

Define osmotic pressure

The pressure that directly opposes the osmotic movement of water

4

What is defined as osmoles of a solute per kilogram of water?

Osmality

5

If a cell gains water in a solution the solution is what compared to a cell?

hypotonic

6

What happens to a cell in hypertonic solution?

It shrinks

7

What molecules enter the cell easily?

Oxygen, carbon dioxide, and lipids

8

Which molecules do not enter the cell easily?

ions, polar molecules, large molecules.

9

What two characteristics affect a molecules movement across a membrane?

Size and lipid solubility

10

What is mediated transport?

The movement of molecules across a membrane with the help of membrane proteins.

11

If the movement stops when the concentration gradient is equal, what is the name of the process?

Facilitate diffusion

12

What are the two main types of transport proteins?

Channel and Carrier

13

What are the three types of gated channels?

Chemically gated, Voltage Gated, and mechanically Gated

14

symport carriers move molecules in what direction?

The same direction

15

Describe the steps of movement through a carrier protein

The molecule binds to the carrier protein
The binding causes a confrontational change
The carrier opens to the other side and releases the molecule

16

What does active transport move molecules against?

Their concentration gradient

17

Which form of active transport uses energy indirectly?

Secondary Active Transport