Question 43 Cancers that metastasize and invade normal

14 Jun Question 43 Cancers that metastasize and invade normal

Question
Question 1
Which of the following is not true regarding the circulatory system?
Answer

This system ensures that waste products are removed from all tissues of the body.

This system is made up of the blood vessels, heart, and blood.

The circulatory system has an important role in the exchange of gases in the lungs.

During fetal development, the circulatory system develops from the lymphatic system.

This system carries excess water and salts to the urinary system.
1 points

Question 2
Which of the following sources of scientific information is the most technical?
Answer

general interest news magazines

newspapers

nonfictional books

peer-reviewed journals

science magazines
1 points

Question 3
A farmer wants to improve crop yield in his fields by testing the effectiveness of a new pesticide available on the market. Which of the following is the best control for this experiment?
Answer

a higher concentration of new pesticide used on the control field than the experimental field

more shade on the control field than the experimental field

less new pesticide used on the control field than the experimental field

more water on the control field than the experimental field

no new pesticide used on the control field; new pesticide used only on the experimental field
1 points

Question 4
Which of the following is considered to be important in protecting individuals from chemicals?
Answer

Type of chemicals they are exposed to

The potential levels of exposure

The toxicity of the chemicals

All of the above
1 points

Question 5
Hormones are specific to particular tissues because
Answer

they will only interact with target cells at a synapse.

they are released next to target tissues, so they cannot interact with other cells.

target tissues display the appropriate receptor for a particular hormone.

they can only be released following depolarization of the target cell.

all of the above
1 points

Question 6
An advantage of the systems-based approach is the recognition that studies relevant to environmental change and infectious disease are embedded within a wider web of interactions.
Answer
True

False

1 points

Question 7
Common side effects associated with chemotherapy are due to:
Answer

fevers induced by the chemicals.

death of cancer cells and their subsequent removal from the body.

change in blood pH caused by the chemicals.

death of normal cells caused by the chemicals.

destruction of RNA in most normal cells.
1 points

Question 8
The Internet has been used as a rapid means to obtain information, including scientific ideas, but generally is less reliable tha print media because
Answer

at present, the Internet is less regulated than broadcast and print media.

anyone can post “scientific” information, regardless of whether the information is misleading or not true.

individuals and/or groups maiy post information to promote their own personal interests rather than ideas that have been tested through the scientific process.

All of the above are correct.

skepticism.
1 points

Question 9
A mass of rapidly dividing cells that have potentially lost the ability to regulate cell division is
Answer

a neoplasm

angiogenesis

dysplasia

hyperplasia

keratosis
1 points

Question 10
Most surveillance systems are passive and disease specific.
Answer
True

False

1 points

Question 11
The type of muscle responsible for involuntary contractions of the stomach is_____muscle.
Answer

smooth

cardiac

intercalated

striated

skeletal
1 points

Question 12
Which of the following defines sub-chronic toxicity correctly?
Answer

Effects of single dose/multiple dose exposures during a 24 hr period.

Effects of multiple dose exposures during a 14 day period.

Effects of multiple dose exposures during a 90 day period.

Effects of multiple dose exposures during more than 90 days.
1 points

Question 13
Which of the following is not a symptom of asthma?
Answer

tightness in the chest

coughing while exercising

wheezing

choking

shortness of breath
1 points

Question 14
Which of the following is a true statement?
Answer

Molecules are considered to be the smallest unit capable of exhibiting all the characteristics of life.

Cells arise spontaneously from nonliving chemical elements.

All living things are made up of at least one cell.

Cells are incapable of maintaining homeostasis because they are too small.

Organisms composed of many cells are unicellular.
1 points

Question 15
In order for a hormone to cause a response, it must first bind to an appropriate receptor on its target cell.
Answer
True

False

1 points

Question 16
A student needs information from the National Institutes of Health, a government agency. Which of the following endings should he or she look for in the address?
Answer

edu

com

gov

nih

org
1 points

Question 17
Uptake of blood glucose by liver cells is stimulated by
Answer

ADH

prolactin

parathyroid hormone

glucagon

insulin
1 points

Question 18
Carbohydrates are characterized by
Answer

being composed of carbon, hydrogen, and nitrogen.

releasing energy when their peptide bonds are broken.

being indigestible by most organisms.

possessing a carbon backbone that is hydrated.
1 points

Question 19
The process of breathing requires the coordinated efforts of the
Answer

bones

respiratory system

circulatory system

muscles

all of the above
1 points

Question 20
H1N1 viruses no longer readily infect humans. They now exist mainly as porcine (swine) viruses.
Answer
True

False

1 points

Question 21
Which of the following would result in passive immunity?
Answer

vaccination

past occurrence of an infection or disease

production of memory cells

movement of antibodies across the placenta from mother to child

stimulation of T cells and B cells by an antigen
1 points

Question 22
When a person exercises, sensory input from moving muscles and joints results in an increase in cardiac output, causing blood pressure to be maintained, despite an increase of blood flow to the muscles.
Answer
True

False

1 points

Question 23
Isotopes of an element have the same ________, but different ________.
Answer

number of electron shells, numbers of protons

atomic number, atomic masses

number of neutrons, numbers of protons

atomic mass, atomic numbers

name, chemical symbols
1 points

Question 24
Which of the following is damaged by exposure to sunlight or tanning lamps?
Answer

collagen fibers in the dermis

small blood vessels

elastin fibers

melanocytes

all of the above
1 points

Question 25
In which of the following locations would one expect to find cartilage?
Answer

between the skin and the underlying muscle

between the vertebrae

in a tendon

in the wall of a blood vessel

in adipose tissue
1 points

Question 26
When a blood pressure is taken by a medical professional, the pressure in the main veins is recorded.
Answer
True

False

1 points

Question 27
Which of the following is true regarding chemotherapy?
Answer

This technique is used in the diagnosis of cancer.

This procedure kills cancer cells and normal cells that divide rapidly.

This is the selected technique in the treatment of cancer because there are no side effects.

This is a procedure used to genetically engineer an individual so cancer will not develop.

Most chemicals used in this procedure only affect one organ of the body.
1 points

Question 28
Which of the following is not true regarding receptor proteins?
Answer

They are used to receive and transmit information across the plasma membrane.

All cells have the same receptor proteins.

When a receptor protein binds to a molecule, a series of biochemical reactions occur that eventually cause changes to occur in the cell.

The molecule that binds to a receptor protein does not enter the cell.

Receptor proteins bind to a specific molecule or group of molecules.
1 points

Question 29
Which of the following occurs when a phosphate is removed from an ATP molecule?
Answer

Energy is added to the ATP molecule to form ATP4.

Oxygen produced in the reaction causes the molecule to explode.

Energy is released for cell work.

Chemical reactions stop in a cell due to lack of an energy source.

Fat is converted to protein.
1 points

Question 30
Once a genetic disorder in an adult is treated successfully through gene therapy, it is highly unlikely that the person’s children will inherit the gene(s) for the disease.
Answer
True

False

1 points

Question 31
Which of the following best explains why people get so many colds in their lifetime?
Answer

The immune system has a hard time identifying the viruses that cause the colds.

The viruses that cause these colds constantly produce new antibodies, which cause the symptoms.

These individuals do not produce enough white blood cells.

The viruses that cause colds evolve rapidly, which results in a change in their antigenic structure.

The B cells of these individuals destroy their T cells.
1 points

Question 32
Although the cells of a multicellular organism are specialized for certain functions, those cells must also be integrated and organized in order to work together to benefit the organism.
Answer
True

False

1 points

Question 33
Blood functions to maintain homeostasis in the human body through all but which of the following:
Answer

moving carbon dioxide away from cells following completion of aerobic metabolism.

preventing excessive blood loss through clotting.

transporting amino acids and other nutrients derived from digestion to all tissues in the body

transporting neurotransmitters to neuromuscular junctions.

regulation of pH of body fluids
1 points

Question 34
Which of the following is not true regarding the immune response?
Answer

The immune response uses chemical and phagocytic cells to destroy foreign cells.

Once initiated, the immune response provides protection for the entire body.

The key to immune response is the ability of the components involved to be able to distinguish between the body cells and foreign cells.

The immune response involves the activities of proteins, cells, and the lymphatic system.

The immune response involves the ability to “remember” exposures to pathogens in order to increase the rate of response upon subsequent infections by that pathogen.
1 points

Question 35
Which of the following white blood cells is most likely to be directly involved in the destruction of viral-infected cells and cancer cells?
Answer

natural killer cells

eosinophils

neutrophils

B lymphocytes

basophils
1 points

Question 36
Diet, including what is and what is not consumed, is believed to play a major role in determining whether or not an individual develops cancer.
Answer
True

False

1 points

Question 37
When the amount of thyroxine in the body increases, the basal metabolic rate of the body also increases.
Answer
True

False

1 points

Question 38
A small amount of DNA was located at a crime scene. Which of the following techniques is most likely to be used to amplify the DNA so it can be identified more accurately?
Answer

genetic engineering

use of DNA ligase to recombine the pieces of DNA

gene therapy

DNA sequencing

polymerase chain reaction
1 points

Question 39
Which of the following is not true regarding metabolism?
Answer

Metabolism involves thousands of different chemical reactions occurring in a living organism.

An anabolic reaction is one in which a large molecule is broken down into smaller molecules.

Linear metabolic pathways occur when the product of one reaction is used as the substrate of the next reaction.

Catabolic pathways result in the release of energy.

Some metabolic pathways form a repetitive cycle.
1 points

Question 40
The process by which the blastocyst becomes buried within the endometrial lining of the uterus is:
Answer

fertilization.

implantation.

morphogenesis.

differentiation

embryonic development.
1 points

Question 41
Ventilation refers to the process by which:
Answer

gases are exchanged between the cells and the lungs.

gases are exchanged between the air and the blood.

air moves into and out of the lungs.

gases are exchanged between the blood and the cells.

ATPs are produced.
1 points

Question 42
Which of the following is not a property of water?
Answer

is composed of polar molecules

is a liquid at room temperature

holds heat energy

is a biological solvent for polar molecules

consists of molecules attracted to each other by covalent bonds
1 points

Question 43
Cancers that metastasize and invade normal tissues to impede their functions are called
Answer

benign tumors

keratosis

malignant tumors

in situ cancer

none of the above
1 points

Question 44
Each amino acid is composed of a central carbon that forms covalent bonds with four other atoms/molecules. These atoms/molecules include all but a(n):
Answer

R group.

A group.

amino group.

hydrogen atom.

carboxyl group.
1 points

Question 45
Which of the following parts of the brain regulates heart activity?
Answer

cerebrum

cerebellum

thalamus

midbrain

medulla oblongata
1 points

Question 46
One of the most common ways to get information out to a wide audience in the least amount of time regarding “hot” topics in science is by using
Answer

peer reviewed journals

science magazines

the Discovery channel on television

general interest news magazines or newspapers

books
1 points

Question 47
Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice?
Answer

Cranberry juice contains chemicals that kill viruses and bacteria.

The increased volume of fluid in the bladder causes bacterial cells to burst as they absorb the excess fluid.

Cranberry juice makes the urine more acidic, decreasing the rate at which microorganisms can grow and reproduce.

Cranberry juice increases the efficiency of urine production by the kidneys.

all of the above
1 points

Question 48
Which of the following disorders is described as follows: damage to motor nerves innervating skeletal muscle; skeletal muscles weaken; death usually results within 5 years of diagnosis?
Answer

ALS (amytrophic lateral sclerosis)

pleurisy

cystic fibrosis

emphysema

botulism
1 points

Question 49
When hyperplasia signals a loss of control of cell division, it always results in cancer.
Answer
True

False

1 points

Question 50
Lipids are important to biological systems because
Answer

they are solid at body temperature so they stabilize membranes

some lipid types are potentially large sources of energy to perform cellular work.

most help to buffer aqueous solutions in the body.

all lipids are very soluble in water.