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This refers to maintaining a steady state of internal conditions such as temperature and pH in living things.
homeostasis
Protein molecules that catalyse biological reactions
enzymes
the variable that is changed in a valid experiment, to test the effect it has on another variable
Independent variable
refers to how close a measurement is to the true value.
 
accuracy
 
validity
 
precision
 
bull's eye!
Part of the scientific report that describes the step by step instructions to conduct the experiment
method
part of the scientific report that describes the purpose of the experiment.
aim
the variable that is measured as the effect in a valid experiment.
Dependent variable
the variables that are kept the same in a valid experiment.
Control variable
The brain and spinal cord are a part of the
Central Nervous System
The nerves that connect the CNS to the rest of the body are part of the
Peripheral Nervous System
Nerve cells are called
neurons
Chemical messengers that travel in the blood
hormones
When blood vessels contract or get smaller, this is called
vasoconstriction
When blood vessels expand or get larger, this is called
vasodilation
Flushing of the face when one is hot is due to ____________ of the surface blood vessels
vasodilation
The body does this to cool down by evaporation of moisture from the skin to remove heat.
sweating
These neurons take messages from receptors to the CNS
sensory neurons
part of female reproductive system that forms barrier between the vagina and the uterus
cervix
When a message travels from one neuron to another , it crosses a gap called the ___________gap between neurons the messages cross is called
synapse
female gonad- where the ovum is released from
ovary
Which two organ systems work together to provide oxygen to cells and remove carbon dioxide?
respiratory and circulatory systems
Which two organ systems work together to provide nutrients to cells
digestive and circulatory systems
Substances dissolved in gas or liquid move down their concentration gradients until the concentration is the same throughout. This is called
diffusion
________________ refers to movement of a substance from high concentrations to low concentration
diffusion
How nutrients move from the digestive system into the blood
diffusion
can molecules pass through the cell membrane
yes
tube that carries sperm from the testes to urethra
sperm duct
Name three types of plate boundary
transform, divergent, convergent
which molecule is bigger, starch or glucose?
starch
Name three organs in the body that secrete hormomes
pancreas, ovaries, testes, thyroid gland, adrenal glands
Name three hormones secreted by the body
oestrogen, progesterone, testosterone, insulin,
Name three conditions the body keeps at a steady state
pH, temperature, blood pressure, blood oxygen, blood glucose
Process of one tectonic plate sliding under the other
subduction
movement of heat in a fluid is called
convection current
at subduction zones, these are more common
volcanoes
Two continental tectonic plates moving towards each other can cause this landform
mountains
To measure liquids accurately, you should use
measuring cylinder
System responsible for making copies of the organism in multicellular organisms
Reproductive system
Site in female reproductive systems where fertilization occurs
oviduct or Fallopian tube
Part of the male reproductive system that directs sperm in the right direction, down uretha and not into bladder
prostate
Name a structural adaptations of a wombat
rearward facing pouch, large front claws, thick fur, square, hard bottom.
Name an abiotic factor in an aquatic ecosystem
amount of sunlight, temp of water, rocks, salinity, turbidity, depth,
Name a biotic factor in an aquatic ecosystem
type of fish, whales, phytoplankton, corral, seaweed
used to measure current in an electrical circuit
ammeter
units for electrical current
amperes
Type of circuit used in homes
parallel
when components share the same path in electrical circuit, they are in
series


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