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PLTW biomedical science 9th grade (1)
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PLTW biomedical science 9th grade (1)
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PLTW biomedical science 9th gradeWhat are the six steps of experimental design? - ANS-Identify questions, make a prediction,
design an experiment, conduct the experiment, analyze the data, and communicate findings.
What is an independent variable? - ANS-factor in an experiment that a scientist purposely
changes
What is a dependent variable? - ANS-The dependent variable is the variable that is measured
What is a controlled variable? - ANS-variable that stays the same
What is a polygraph? - ANS-lie detector test
what is measured in a polygraph test? - ANS-heart rate, blood pressure, respiration rate, skin
conductivity
what is the outer part of the hair? - ANS-cuticle
What is the middle part of the hair? - ANS-cortex
What are the parts of the hair? - ANS-cuticle, cortex, medulla
Where is the medulla located? - ANS-the base of the brainstem
What are the three main fingerprint patterns? - ANS-loops, arches, whorls
what is a presumptive test? - ANS-Test to see if blood is present upon the properties of
hemoglobin in the blood
What is the most common presumptive test? - ANS-Kastle-Meyer
What is the DNA structure? - ANS-It is made up of a phosphate group, a ribose group, and a
nitrogenous base.
What is DNA shaped like? - ANS-double helix
What is a eukaryotic cell? - ANS-Cell with a nucleus and membrane bound organelles
What is a prokaryotic cell? - ANS-cell that does not have a nucleus or organelles
What is PCR? - ANS-Polymerase Chain Reaction; used to amplify DNA
, What are restriction enzymes? - ANS-They cut the DNA into specific parts
What is gel electrophoresis? - ANS-a laboratory method used to separate mixtures of DNA,
RNA, or proteins according to molecular size
What is an autopsy? - ANS-medical examination of a dead body to determine the cause of
death
What is the cause of death? - ANS-The breakdown of the essential proteins of the heart and
brain
What is manner of death? - ANS-How the cause of death came into being
What is the mechanism of death? - ANS-the specific change in the body that brought about the
cessation of life
What is the integumentary system? - ANS-consists of skin, mucous membranes, hair & nails.
This system also serves as a barrier to pathogens & helps regulate body temperture.
What is the respiratory system? - ANS-This system keeps the body's cells supplied with oxygen
& removes carbon dioxide as it is released from cells. the Lungs house tiny air sacs->alveoli
What is the digestive system? - ANS-consists of all organs from mouth to the anus involved in
the ingestion and breakdown or processing of food.
What is the skeletal system? - ANS-protects and supports body organs, and provides
frameworks the muscles use to cause movement. Blood cells are formed within bones. Bones
store minerals.
what is the muscular system? - ANS-Consists of skeletal muscles, tendons that connect
muscles to bones, and ligaments that attach bones together to form joint
What is the urinary system? - ANS-the excretory (urinary) system helps maintain the water &
electrolyte balance in the body. regulates the acid-base balance in the blood. removes other
cellular wastes.
What is the lymphatic system? - ANS-Consists of lymph nodes and lymph vessels that carry
lymph (a clear fluid right in antibodies). The spleen, thymus, and the tonsils are made of
lymphoid tissue. It supports the immune system by housing and transporting white blood cells to
and from lymph nodes. This system also returns fluid that has leaked from the cardiovascular
system back into the blood vessels.
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