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Review for Biology Semester 2 Final Exam
Review for Biology Semester 2 Final Exam
43
Science
9th Grade
10/29/2014

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Cards

Term
Which variable is the cause in an experiment?
Definition
Independent variable
Term
Which variable is the result in an experiment
Definition
Dependent variable
Term
Which variable goes on the x-axis?
Definition
Independent variable
Term
Which variable goes on the y-axis?
Definition
Dependent variable
Term
What is the format for a properly stated hypothesis?
Definition
If (Independent Variable) then (Dependent Variable).
Term
Why is it important to change only one variable in an experiment at a time?
Definition
This helps identify the variable that caused the result. If you change too many variables then you will not know which caused the result.
Term
There are a couple pieces of information necessary to determine physical fitness. What are they?
Definition
Physical activity level and dietary input
Term
What is recorded in a dietary analysis?
Definition
All the foods and nutrients you ingest during a specified time period.
Term
What is mechanical breakdown of food?
Definition
This is the physical smashing of food such as when chewing in the mouth or grinding of food in the stomach.
Term
Name the enzyme that helps to chemically digest starch.
Definition
Amylase
Term
What is starch broken down into when it is chemically digested?
Definition
sugar such as glucose
Term
Name the enzyme that helps to chemically break down protein.
Definition
Pepsin
Term
What is protein broken down into when it is chemically digested?
Definition
Amino Acids
Term
What enzyme helps regulate blood sugar levels?
Definition
Insulin
Term
What is glucose?
Definition
This is simple sugar
Term
What is starch made of?
Definition
a chain of glucose
Term
What is protein made of?
Definition
a chain of amino acids
Term
What are lipids made of?
Definition
Glycerol and fatty acids
Term
What is the smallest living component?
Definition
Cell
Term
What surrounds the outside of a cell?
Definition
Plasma membrane (also called cell membrane)
Term
Why are plasma membranes considered to be semi-permeable?
Definition
The membranes let in some but not all materials
Term
What is the type of solution that has more dissolved particles and less water than a cell?
Definition
hypertonic
Term
What is the type of solution that has less dissolved particles and more water than a cell
Definition
hypotonic
Term
What is the type of solution that has the same concentration of dissolved particles and water as a cell
Definition
isotonic
Term
Tell what the cell would do in this situation: Concentration inside the cell is 10% salt and 90% water and the cell is 50% salt and 50% water
Definition
water will move out - cell will shrink
Term
What is the term for returning back to normal?
Definition
homeostasis
Term
Name some things that may happen if you are exercising.
Definition
sweat, dehydrate, heart rate increase, breathing rate increase, dilation of blood vessels which produces a flushed appearance to skin
Term
Why does your body sweat?
Definition
It is to try to cool your body and bring it back to normal/homeostasis.
Term
What two systems do we need to maintain homeostasis?
Definition
Endocrine and Nervous
Term
What will a cell do when it is placed in a hypertonic solution?
Definition
it will shrink - water will go out
Term
what will happen when a cell is placed in a hypotonic solution?
Definition
It will swell - water will go in (might even burst/lyse)
Term
What is the endocrine system?
Definition
It releases hormones to regulate the body
Term
What is the nervous system?
Definition
It responds to stimuli to help maintain the body and respond to the environment.
Term
What is it called when we are in a normal, healthy state?
Definition
Homeostasis
Term
What is the scientific term used to describe when a cell bursts open?
Definition
Lyse
Term
What is the term used to describe the liquid portion of a solution?
Definition
solvent
Term
What is the term used to describe the solid part of a solution?
Definition
Solute
Term
What is mitosis?
Definition
The division of a body cell to make two daughter cells.
Term
What is Meiosis?
Definition
The division of a cell to make sperm or egg cells (gametes).
Term
What happens to the number of chromosomes at the end of meiosis?
Definition
it is only half of the original number
Term
What cell division process makes egg or sperm cells?
Definition
Meiosis
Term
What cell division process makes body cells?
Definition
Mitosis
Term
What are chromosomes?
Definition
These are structures found inside the nucleus of a cell that contain the DNA (genetic information) for a cell.
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