Ch. 3 A&P Cells

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A protein that spans the cell membrane is termed a(n)

integral protein.

Cancer can result if

mitosis is too frequent or does not stop.

Which of the following describes a lysosome?

A tiny, membranous sac that contains enzymes that degrade worn cell parts and debris.

Lucky people who cannot be infected with HIV are protected because

their cells lack receptors that admit the virus

The function of the nucleus is to

direct the activities of the cell.

Cells are measured in


The three major parts of a cell are

the nucleus, cytoplasm, and cell membrane

The nucleolus contains

RNA and protein.

The defining characteristic of a stem cell is


Endoplasmic reticulum is best described as a

network of interconnected membranes.

Which of the following is isotonic to red blood cells?

0.9% NaCl solution

Bone cells and muscle cells differ in structure and function because

each expresses a different subset of genes.

Cells lose water when placed in a __________ solution.


Stages of the cell cycle unfold in the following order:

interphase, mitosis, cytoplasmic division, differentiation

If a red blood cell is placed in a hypotonic solution

the cell will swell and may eventually burst.

A young man who ran 6 miles a day throughout high school is injured during his first season running cross country in college, and must rest for three months, then gradually begin exercising again. The skeletal muscle size in his lower limbs decreases during this prolonged period of inactivity. The organelles that break down his muscle protein are


Which organelle contains the nucleolus?

the nucleus.

A hypotonic solution

has a lower concentration (number) of solute particles than do the cells in the solution.

Apoptosis is also known as

programmed cell death.

The two types of genes that, when abnormal, cause cancer are

tumor suppressors and oncogenes.

Which of the following correctly describes the structural organization of the cell membrane?

A bilayer of phospholipid molecules in which protein molecules are embedded and can move

The sequence of organelles and cell parts that a secretion encounters is

nucleus, ER, Golgi apparatus, vesicles, cell membrane.

In a cell, lipids are synthesized in the

smooth ER.

Stem cells taken from a person to be used to treat a disease in that same person come from

the body and unaltered or from reprogrammed cells.

An isotonic solution

has the same osmotic pressure as the cells in the solution.

Chromosomes duplicate during


Cellular adhesion molecules are

peripheral proteins.

Cytoskeletal structures that are not found in all cell types are

intermediate filaments.

Which of the following does not influence the rate of diffusion?

The amount of energy available for transport molecules

If the concentration of glucose in the water outside of a cell is higher than the concentration inside,

water will leave the cell by osmosis.

A selectively permeable membrane

allows some substances to pass through and excludes others.

For which of the following organelles is the structure and function correctly described?

Endoplasmic reticulum-network of interconnected membranes forming sacs and canals; packages protein molecules for secretion

Adrenoleukodystrophy is caused by deficiency of a protein in the outer membrane of


Centromeres of replicated chromosomes separate during mitotic


Filtration is the movement of molecules through a membrane

by hydrostatic pressure that is greater on one side of the membrane than on the other.

Molecules bind to receptor sites and are enclosed in vesicles in the process of

receptor-mediated endocytosis.

Vesicles are formed from

cell membrane.

A hypertonic solution

has a greater concentration (number) of solute particles than do the cells in the solution.

The organelle where energy is captured and stored in the chemical bonds of ATP is a


The main function of cristae is to

increase the surface area for chemical reactions.

The structures in the nucleus that serve as a "mitotic clock" are


What characteristic do simple diffusion and facilitated diffusion share?

Both move a substance from a region of higher concentration to one of lower concentration without cellular energy.

The cell membrane

all answer choices are correct

The relationship of osmotic pressure and the number of solute particles in a solution is the

greater the number of solute particles, the greater the osmotic pressure.

In phagocytosis

a cell membrane engulfs solid particles.

The average number of divisions that a human cell cultured in a dish can undergo is


The cellular abnormality that causes cystic fibrosis is

abnormal chloride channels that trap salt inside cells lining the lung passageways.

As a cell grows,

its surface area increases to a lesser degree than its volume.

Osmosis is the movement of

water molecules from a high concentration to a low concentration through a selectively permeable membrane.

Which of the following transport processes does not require expenditure of cellular energy?

Facilitated diffusion

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