Ch. 3 A&P Cells

question

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

integral protein.
question

Cancer can result if
answer

mitosis is too frequent or does not stop.
question

Which of the following describes a lysosome?
answer

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

Lucky people who cannot be infected with HIV are protected because
answer

their cells lack receptors that admit the virus
question

The function of the nucleus is to
answer

direct the activities of the cell.
question

Cells are measured in
answer

micrometers.
question

The three major parts of a cell are
answer

the nucleus, cytoplasm, and cell membrane
question

The nucleolus contains
answer

RNA and protein.
question

The defining characteristic of a stem cell is
answer

self-renewal.
question

Endoplasmic reticulum is best described as a
answer

network of interconnected membranes.
question

Which of the following is isotonic to red blood cells?
answer

0.9% NaCl solution
question

Bone cells and muscle cells differ in structure and function because
answer

each expresses a different subset of genes.
question

Cells lose water when placed in a __________ solution.
answer

hypertonic
question

Stages of the cell cycle unfold in the following order:
answer

interphase, mitosis, cytoplasmic division, differentiation
question

If a red blood cell is placed in a hypotonic solution
answer

the cell will swell and may eventually burst.
question

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
answer

lysosomes.
question

Which organelle contains the nucleolus?
answer

the nucleus.
question

A hypotonic solution
answer

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

Apoptosis is also known as
answer

programmed cell death.
question

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

tumor suppressors and oncogenes.
question

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

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

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

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

In a cell, lipids are synthesized in the
answer

smooth ER.
question

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

the body and unaltered or from reprogrammed cells.
question

An isotonic solution
answer

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

Chromosomes duplicate during
answer

interphase
question

Cellular adhesion molecules are
answer

peripheral proteins.
question

Cytoskeletal structures that are not found in all cell types are
answer

intermediate filaments.
question

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

The amount of energy available for transport molecules
question

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

water will leave the cell by osmosis.
question

A selectively permeable membrane
answer

allows some substances to pass through and excludes others.
question

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

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

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

peroxisomes.
question

Centromeres of replicated chromosomes separate during mitotic
answer

anaphase.
question

Filtration is the movement of molecules through a membrane
answer

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

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

receptor-mediated endocytosis.
question

Vesicles are formed from
answer

cell membrane.
question

A hypertonic solution
answer

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

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

mitochondrion.
question

The main function of cristae is to
answer

increase the surface area for chemical reactions.
question

The structures in the nucleus that serve as a “mitotic clock” are
answer

telomeres
question

What characteristic do simple diffusion and facilitated diffusion share?
answer

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

The cell membrane
answer

all answer choices are correct
question

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

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

In phagocytosis
answer

a cell membrane engulfs solid particles.
question

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

40-60.
question

The cellular abnormality that causes cystic fibrosis is
answer

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

As a cell grows,
answer

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

Osmosis is the movement of
answer

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

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

Facilitated diffusion

Get instant access to
all materials

Become a Member