NEW
Font size
WorksheetsDisruption of Homeostasis
Total questions: 20
Worksheet time: 10mins
The chemical that is responsible for the decrease in blood glucose concentration is released by
muscle cells
guard cells
the pancreas
the ovaries
Feedback interactions in the human body are important because they
regulate the shape of molecules involved in cellular communication
keep the internal body environment within its normal range
direct the synthesis of altered genes that are passed on to every cell in the body
determine the diversity necessary for evolution to occur
How do vaccinations help prepare the body to fight invasions of disease causing organisms?
inhibiting antigen production
stimulating red blood cell production
stimulating antibody production
inhibiting white blood cell production
An individual who has had chicken pox rarely gets this disease again. This situation is an example of
biological control
passive immunity
active immunity
negative feedback
Which activity would stimulate the human immune system to provide protection against an invasion by a microbe?
receiving hormones contained in mother’s milk while nursing
being vaccinated against chickenpox
choosing a well-balanced diet and following it throughout life
receiving antibiotic injections after surgery
Which statement provides the best possible reason for the decrease in number of cases of bacterial pneumonia from 1940 to 1970?
As a result of genetic engineering, humans became immune to the bacteria.
As a result of sexual reproduction, the bacteria evolved into a harmless form.
The bacteria did not respond to medical treatments.
Antibiotics were made available for the treatment of bacterial infections.
The diagnostic test for HIV, the virus that causes AIDS, involves testing the blood for antibodies associated with this pathogen. Antibodies are produced when the body
stimulates enzyme production
synthesizes microbes
secretes specific hormones
detects foreign antigens
Which statement is an example of a feedback mechanism in humans?
An increase in the level of blood sugar results in the pancreas increasing the amount of insulin it secretes.
An increase in exercise results in a decrease in the rate of respiration.
Increased muscle activity results in a decrease in heart rate.
Increased exposure to pathogenic bacteria results in an increase in the number of red blood cells produced.
Doctors sometimes use a vaccine to prepare the body to defend itself against future infections. These vaccines most often contain
antibiotics
weakened pathogens
white blood cells
antibodies
White blood cells are most closely associated with which two body systems?
excretory and immune
digestive and excretory
circulatory and digestive
immune and circulatory
The role of antibodies in the human body is to
increase the production of guard cells to defend against pathogens
stimulate pathogen reproduction to produce additional white blood cells
promote the production of antigens to stimulate an immune response
recognize foreign antigens and mark them for destruction
An allergic reaction occurs when the immune system
Maintains homeostasis
Does not respond to pathogens
Responds to usually harmless environmental substances
Undergoes rapid, uncontrolled cell division
Allergic reactions usually occur when the immune system produces
enzymes against usually harmless antibodies
Antibiotics against usually harmless antigens
Antigens against usually harmless antibiotics
Antibodies against usually harmless antigens
Every time a child visited a cousin who has two cats, the child’s eyes turned red, itched, and began to water. Then, the child began to have trouble breathing. It is most likely that the child reacted this way because
cat antigens stop the immune system from making antibodies, so bacteria cause these responses
normally harmless cat antigens stimulated the immune system
it is difficult for the respiratory system to filter cat antigens out of the inhaled air
cat antigens are a health hazard, since they always cause disease
Certain microbes, foreign tissues, and some cancerous cells can cause immune responses in the body because all three contain
Cytoplasm
Antigens
Fats
Enzymes
A person who is given an injection containing only
antibodies would most likely develop
allergies
passive immunity
sickle-cell anemia
leukemia
People who have AIDS are more likely than others to
become ill with multiple infections because the
pathogen that causes AIDS
targets many body systems
damages the immune system
increases the rate of enzyme activity in different
types of body cells
mutates, releasing toxins directly into the
bloodstream
An individual who has had chicken pox rarely gets
this disease again. This situation is an example of
active immunity
biological control
negative feedback
passive immunity
The maintenance of proper blood sugar level involves the storage of excess sugar in the
liver
salivary glands
stomach
pancreas
An example of the maintenance of homeostasis in humans is the action of glucagon and insulin in regulating the
temperature of the body
secretion of thyroxin
concentration of blood sugar
excretion of urine from the bladder
