(Copied) True/False Questions Chapter 5 Biology

Proteins

"Gated" ion channels are controlled by:

d) Endocytosis

A cell must expand energy to transport substances using a) Diffusion b) Facilitated diffusion c) Osmosis d) Endocytosis

True

A cell with high turgor pressure is probably in a hypotonic solution

3,2

According the sodium-potassium pump, as __ ions leave, __ ions enter the cell

Phagocytosis

Bacteria ingest food through the process of:

True

Brownian motion takes place even at equilibrium.

Facilitated diffusion

Carrier proteins are important in:

Swell

Carrots placed in a hypotonic solution will:

True

Contractile vacuoles collect excess water and squeeze it out of the cell

True

Contractile vacuoles remove water from cells

The swelling and bursting of animal cells when water enters is called

Cytolysis

False

Cytolysis occurs when water leaves the cell and the cell wilts

Hypotonic- Concentration of solute molecules is higher inside cell. Water enters to dilute. Cell Expands. Hypertonic- Concentration of solute molecules is higher outside cell. Water leaves to dilute. Cell shrinks. Isotonic- Concentration of solute is balanced outside/inside cell, water moves in both directions

Describe the following solutions- Isotonic, hypotonic, hypertonic

2 types of endocytosis are pinocytosis which ingest solute and fluids into the cell with the use of energy. And phagocytosis is when it ingests food particles with the use of energy.

Describe the two types of endocytosis

Passive Transport

Diffusion and osmosis are examples of:

Passive transport

Diffusion and osmosis are examples of:

False

Diffusion occurs only in living systems

Down the concentration gradient

During Diffusion molecules tend to move

Down their concentration gradient

During diffusion, molecules tend to move:

True

Endocytosis is a form of active transport.

Mitochondria

Energy for active transport comes from a cell's

Endocytosis is when cells ingest larger particles, and Exocytosis is movement of large particles out of the cell. They both are active transport(uses energy).

Explain the difference between Endocytosis and exocytosis

Water leaves the cell to dilute salt water: cells shrink: plasmolysis

Explain what happens when a freshwater plant is placed in seawater

The salt releases water to dilute the solute, which then causes the cell to shrivel up and die.

Explain what happens when salt is poured on a slug...

Are specific for substances they transport

Facilitated diffusion carrier proteins and cell-membrane pumps both:

molecules that are not soluble in lipids

Facilitated diffusion is often used to transport

Non soluble lipids

Facilitated diffusion is often used to transport:

False

Facilitated diffusion requires a net absorption of energy

False

Gated channels provide a mechanism for active transport

Facilitated diffusion

Glucose enters a cell by:

Movement of materials in and out the cell

Homeostasis is:

True

In active transport, energy is required to move a substance across a cell membrane.

ATP

It is the molecule that provides the energy for active transport

True

Membranes are selectively permeable if they are allow only certain substances to diffuse across them.

Passive Transport

Movement of molecules in response to a concentration gradient:

Diffusing through Na+ ion channels

Na+ ions enter the cells by

Diffusion

Osmosis is a form of:

True

Osmosis is diffusion of water through a membrane.

False

Oxygen molecules enter the cell by osmosis

Ion Channels

Passages that permit a cell membrane to be permeable:

Water

Passes through the cell membrane through the process of osmosis

Cell energy

Passive Transport is defined as the movement of any substances across a membrane without the use of:

Endocytosis

Pinocytosis and phagocytosis and both examples of:

False

Pinocytosis and phagocytosis are examples of exocytosis

move into the cell

Placing an animal cell in a hypotonic solution will cause water to

shriveling

Plasmolysis refers to cell's:

Oxygen

Substances that can pass through cell membranes by diffusion include:

sodium-potassium pump

The cell must use energy to transport substances by using:

Hypotonic

The contractile vacuole of a paramecium is active when the paramecium is in ______enviroment

A hypotonic solution

The contractile vacuole of a paramecium should be active when the paramecium is in

Concentration gradient

The difference in concentrations of a substance across space is:

splitting of ATP

The energy needed to power the sodium-potassium pump is provided by the

Cell wall

The extent to which a plant cell will swell is limited by the:

turgor, plasmolysis

The loss of water from a cell can result in a change from __ to __

False

The outermost surface of cell membranes is hydrophobic

Cell membrane

The part of the cell that functions to maintain homeostasis relative the cell's environment.

Facilitated diffusion

The passive form of carrier transport is called:

Turgor Pressure

The pressure inside a plant cell caused by water pushing against the cell wall is called

Plasmolysis

The shrinking of plant cells when water leaves so the cell membrane pulls away from the cell wall is called

True

The sodium-potassium pump moves ions against the concentration gradient.

Na+ out of the cell and K+ into the cell

The sodium-potassium pump transports

Solute

The substance that dissolves to make a solution is called the

Cell

The word cyto- means

To eat

The word part phago- means:

To drink

The word part pino- means:

Osmosis

Water enters the cell by:

Plasmolysis

What describes the condition of a cell wall that wilts as a result of water loss?

When cells ingest larger particles with using energy

What is endocytosis

Way for cells to release large molecules, such as proteins, by using energy

What is exocytosis?

Bursting of cells

What is meant by cytolysis

Ingest large food particles into the cell using energy (Active Transport)

What is meant by phagocytosis

To maintain water balance they collect and pump excess water.

What is the function of contractile vacuoles in freshwater organisms

Undergoes cytolysis

When a human red blood cell is placed in a hypotonic environment, it will:

Wilts

When cells in a plant have low turgor pressure, the cell

An area of high concentration to an area of low concentration

When molecules move down the concentration gradient it means they are moving from

Equilibrium

When the concentration of a solute is the same throughout a system, the system has reached

true

When the concentrations of solutes outside and inside the cell are equal, the cell is isotonic.

Is rigid

When turgor pressure of a cell is high a plant:

Fluids move in

Which occurs in pinocytosis