PCAT BIOLOGY 1 Flashcards
The presence of which bacteria is an indiction of human or animal wastes in water supply?
E.coli
The Kreb’s cycle is a a characteristic of?
cellular respiration
What part of cellular respiration take place at the inner mitochondrial membrane?
electron transport chain
A drug designed to enhance the ability of the body to get rid of cancer cells or virus-infected cells would most likely be enhancing the function of
Cytotoxic T cells(NK)
What blood vessel has the highest pressure?
Arteries
The predominant site of B-lymphocyte production in most mammals is
Bone marrow
This class of hormones is produced in both the adrenal cortex and gonad?
Steroidal
Stability in an allele is caused by
Selection pressure which eliminates extremes of traits
Many of the blood pressure medications currently in use lower blood pressure by ?
Dilating blood vessels
In parasitism, the interaction between two organisms?
One organism benefits the other
What is filtered by the Kidney?
uric acid, creatinine, urea
The Eustachian canal functions to
equalize air pressure( between middle ear and pharynx)
The function of dendrites( web-like structures) at the end of a neuron is
to increase surface area
The site of glycogenesis
the liver
Natural but active immunity is acquired when ________
a person has and recovers from a disease
Antibodies transferred from mother to child is an example of ________
naturally acquired passive immunity
A person receiving antibodies from a horse is an example of __________
artificially acquired passive immunity
a person being injected with an antigen is an example of_________-
artificially acquired natural immunity
During embryogenesis, mesoderm gives rise to
muscles and reproductive organs
The first phase of mitosis is __________
prophase
Failure of chromosomes to separate during cell division leads to__________
polyploidy
The function of semicircular canals is _________
balance
Unequal concentrations of an ion inside or outside of a cell are maintained by _________
active transport
_______ is the release of a substance for use by the organism producing it
secreation
____________are the most immunologic class of molecules`
proteins
What are the most numerous blood vessels in the body?
Capillaries
________ do not have a nucleus
bacteria
The function of red bone marrow is _________
synthesis of red blood cells
insertions and deletions are both examples of ________
mutations
__________ is a small piece of DNA found in bacteria cells
plasmids
The study of fungi is called ___________
mycology
A structure produced by some bacteria is very resistant to heat and chemicals is the
spore
_______ are obligate intracellular parasittes
viruses
______________ control the growth of bone
pitutiary glad
_____________ is used for the production of thyroxine
iodine
Steroid hormones are produced by_______________
reproductive glands and adrenal glands
Maintaining NA/K balance in the body is the function of the __________
kidney
The disease botulism blocks the release of ach. The effect of this would be___________
loss of signal transmission from nerve to muscle
A virus carries genetic information from one bacteria to another in the process of _________
transduction
The disease Reyes Syndrome is linked with the use oF _______
ASPIRIN
The binding of ubiquitin usually triggers _________
proteosomal degradation of protein
In bacteria, the electron transport chain takes place in_________
the cell membrane
The outer layers of the skin are composed of________
striated squamous epithelium
In the _______ cycle 2 three carbon molecules are broken down into six CO2 molecules
Citric acid cycle
Appendicular skeleton
arms and legs
The highest blood pressure would be present in the_______
aorta
The term cleavage refers to________
an early phase of embryonic development
In the united states, 1 in 250 people suffer from hemochromatosis, a common hereditary disease. The disease results in an accumulation of iron in the body. What is a common form of treatment?
Blood letting
_______ is a trihybrid cross
1/16
______ is found in prokaryotes and not eukaryotes
Pilli
In individuals who have the genotype XXX this occurs as a result of _______
nondisjunction
Certain bacteria take atomospheric nitrogen( N2) and turn it into ammonium( NH3), a process know as
nitrogen fixation
During the menstrual cycle, production of luteinizing hormone later leads to the production of progesterone. If fertilization does not occur, the rising levels of progesterone will inhibit further production of lutienizing hormone. This is an example of_________
negative feedback
Edward Jenner developed the idea of _______
vacinnes
Allergies are caused by
an overreaction to harmless materials
Mitosis results in_________
two cells with the same number of chromosomes as the parent cells
___________ are responsible for the synthesis of protein?
ribsomes
A mushroom is __________
a reproductive structure
