Anatomy Chapter 3

Intracellular structures which have specific shapes and functions are called

The cytoskeleton

Is a network of polysaccharide filaments extending throughout the cytoplasm

Includes microtubules composed of actin that assist in moving chromosomes

Includes micro filaments composed of tubulin that are involved in movement and support

Maintains the shape of a cell and helps organize intracellular contents

Includes intermediate filaments that serve as intracellular conveyor belts

The advantage of the presence of microvilli on cell membrane is :

Such cells can move

Materials can be pushed across the cell surface

The membranes has a greater surface area for an increased rate of diffusion

The microvilli can extend out to engulf solid particles

The membrane is more permeable to polar substances

Which cell organelle is the site of a fatty acid, phospholipid and steroid synthesis?

The golgi complex is most extensive in cells that:

How are phospholipid molecules arranged within the lipid bilayer of the plasma membrane?

The hydrophobic lipid tails and the hydrophilic polar phosphate heads are arranged randomly

The hydrophobic lipid tails are oriented toward the ECF and the ICF

The hydrophobic phosphate heads are oriented toward the ECF and ICF

The hydrophobic lipid tails are oriented toward the ECF and the ICF

The hydrophobic phosphate heads are oriented toward the ECF and the ICF

The reason the lipid bilayer of a plasma membrane is asymmetric is that:

Glycolipids appear only on the extracellular side of the membrane

The phospholipids are randomly arranged

Cholesterol molecules line up on the inner surface of the membrane

The phospholipids in the outer layer are larger molecules than those of the inner layer

Glycolipids make up the outer layer, while phospholipids make up the inner layer

An electrochemical gradient requires a difference in the

Concentration of a substance on one side of the plasma membrane vs the other

Charge distributions on one side of the plasma membrane vs the other

Number of glycolipids on one side of the plasma membrane vs the other

Both A and B are correct

A, B, and C are correct

Mechanisms that allow movement of materials across a plasma membrane include:

Aquaporins

The places where receptors bind to ligands

The "rivers" of water flow throughout the cytosol

Sites of hydrolysis within the cytoplasm

Water channels in a plasma membrane

The sugar molecules that attract a fluid layer to the cell's surface

Osmosis is considered a special case of diffusion because:

A solute moves against its gradient

It is the movement of water down its own gradient

It is the movement of water against its own gradient

Water requires a transporter protein to get through the lipid bilayer

Both C and D are correct

Red blood cells membranes are not normally permeable to NaC1, and maintain an intracellular concentration of NaC1 of 0.9%. If these cells are placed in a solution containing 9% NaC1, what would happen?

Nothing will happen because the membrane is not permeable to NaC1

Water will enter the cell because the intracellular fluid has a higher osmotic pressure

The cell will undergo hemolysis due to membrane damage from the 9% NaC1 solution

The cell will crenate because the extracellular solution has a higher osmotic pressure

The cell will generate NaC1 to make up the difference in concentrations

Tiny organelles that contain many kinds of proteases and are responsible for destruction of damaged or unnecessary proteins are the

The end result of mitosis is production of

One cell with twice as many organelles as the parent cell

Two cells with half as many chromosomes as the parent cell

Sperm cells and egg cells

Four cells with twice as much DNA as the parent cell

Two cells identical to the parent cell

Which of the following lists the phases of the cell cycle in the correct sequence?

S-phase, G1 phase, G2 phase, cytokinesis, S phase

Mitosis, cytokinesis, G1 phase, G2 phase, S phase

Cytokinesis, G1 phase, S phase, G2 phase, mitosis

G1 phase, S phase, G2 phase, mitosis, cytokinesis

G1 phase, G2 phase, mitosis, S phase, cytokinesis

Cytokinesis

Begins after the chromosomes are separated and moving in opposite directions

Results in the division of the cytoplasm

Is followed by interphase

A and B are correct

A, B, and C are correct

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Anatomy Chapter 3

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