Question 31
Anemia is the decreased ability of ______ to supply adequate oxygen to the body's cells.
white blood cells
red blood cells
platelets
none of the above
1 points
Question 32
The lymphatic system functions in the absorption of ______.
excess fluid
fat
both a and b
none of the above
1 points
Question 33
Which of the following is NOT a level of defense in the human body?
physical barriers
non-specific defense mechanisms
specific defense mechanisms
none of the above
1 points
Question 34
Which of the following is NOT a barrier to entry?
saliva
tears
mucous membranes
none of the above
1 points
Question 35
Which of the following is NOT a sign of inflammation?
swelling
pain
redness
none of the above
1 points
Question 36
The ______ system produces antibodies against specific pathogens.
nervous
endocrine
immune
none of the above
1 points
Question 37
Macrophages are ______ blood cells that continually patrol the body in search of foreign molecules.
red
plasma
white
none of the above
1 points
Question 38
Vaccines are weakened ______ that prompt the development of antibodies but not the disease.
viruses
bacteria
both a and b
none of the above
1 points
Question 39
People with type O blood can donate blood to ______.
only other people with O blood
no one
anyone
none of the above
1 points
Question 40
During an allergic reaction, cells release histamine, which starts the ______ response.
excretory
inflammatory
nervous
none of the above
1 points
Question 41
Autoimmune diseases result when the ______ system attacks and destroys cells and tissues of the body.
immune
nervous
digestive
none of the above
1 points
Question 42
Animals are heterotrophs that derive their energy from _______.
chemicals
the sun
another organism
none of the above
1 points
Question 43
The ______ breakdown of food is accomplished by enzymes.
physical
chemical
mechanical
none of the above
1 points
Question 44
Ingestion is the ______ stage of digestion.
third
second
first
none of the above
1 points
Question 45
The biliary system consists of accessory ______ organs.
reproductive
digestive
cardiovascular
none of the above
1 points
Question 46
Muscular contractions of the ______ are known as peristalsis.
esophagus
diaphragm
trachea
none of the above
1 points
Question 47
Once food passes from the mouth and down the ______, it enters the stomach.
trachea
small intestine
esophagus
none of the above
1 points
Question 48
The small intestine is where final ______ occurs.
absorption
digestion
both a and b
none of the above
1 points
Question 49
The liver sends ______ to the small intestine.
insulin
gastric juices
bile
none of the above
1 points
Question 50
Movements within the ______ are due to involuntary muscle contractions.
large intestine
anus
esophagus
none of the above
1 points
Question 51
Which of the following is a macronutrient?
carbohydrates
lipids
amino acids
all of the above
1 points
Question 52
Exoskeletons are found on the ______ of the body.
outside
inside
both a and b
none of the above
1 points
Question 53
Muscles for movement attach to the inner surface of the ______.
endoskeleton
exoskeleton
both a and b
none of the above
1 points
Question 54
Which of the following is a part of the vertebrate skeleton?
lateral
axial
both a and b
none of the above
1 points
Question 55
The upper bone of the ______ is the humerus.
spinal column
leg
arm
none of the above
1 points
Question 56
The ______ layer of the bones is known as the periosteum.
outer
inner
both a and b
none of the above
1 points
Question 57
Eventually, the ______ stops, and the cartilage is all converted into bone.
elongation
shortening
contraction
none of the above
1 points
Question 58
Immovable joints join the bones of the ______.
shoulder
jaw
skull
none of the above
1 points
Question 59
When one muscle contracts, what does the other do?
stays still
contracts
relaxes
none of the above
1 points
Question 60
Within each myofibril there are dense ______.
sarcomeres
Z lines
cilia
none of the above
1 points
Question 61
Motor neuron axons from nerve cells connect to ______ fibers.
ligament
muscle
tendon
all of the above
1 points
Question 62
Animals exchange ______ via their respiratory systems.
fluids
minerals
gases
none of the above
1 points
Question 63
______ vertebrates use only lungs to exchange gases.
Terrestrial
Aquatic
Amphibian
none of the above
1 points
Question 64
Gills are typically outgrowths of ______ or clustered strands of filaments.
capillaries
organs
tissue
none of the above
1 points
Question 65
The epiglottis prevents food from entering the _______.
esophagus
trachea
stomach
none of the above
1 points
Question 66
______ branch into smaller and smaller tubes known as bronchioles.
Vocal cords
Alveoli
Bronchi
all of the above