WorksheetsFinal test science 8 secon
Total questions: 20
Worksheet time: 43mins
What is the nervous Systems?
The control of body
Consists of two divisions: the central nervous systems containing the Brian and spinal cord, and the peripheral nervous systems which is a network of nerves and neural tissues branching out throughout the body.
System that containing the brain
Neuron and cerebrum
select the correct option: Types of neurons
Schwann cells, only found on peripheral nerves which can regenerate
Interneurons are located entirely within the central nervous system.
sensory receptors and transmit impulses to the central nervous system
NERVE RECEPTORS, SENSORY NEURONS, INTERNEURONS and MOTOR NEURONS
Synapses…
Nerve impulses are transmitted via branches
The axon is covered with a insulating fatty layer called a myelin
is a network of nerves and neural tissues
Motor neurons cause muscle contractions and control secretions from glands and organs…
Taking up 7/8ths of the brain’s weight, the cerebrum governs all sensory and motor activity. This includes sensory perception, emotions, consciousness, memory, and voluntary movements.
false
true
It is a chemical change in which one or more substances are destroyed and one or more new substances are created. is call
•aqueous solution (the substance is dissolved in H2O)
spinal cord
Chemical Reaction
Substances created by the chemical change
Parts of a Chemical Reaction
Chemical Reactions
The brain and spinal cord are enclosed by 3 membranes, collectively known as the meninges
one or more substances are destroyed
Reactants, The arrow and Products
Evidence for a Chemical Reaction
light or heat, Temperature, gas, Color change and Formation of a precipitate
(s) = solid
(l) = liquid
(g) = gas
(aq) = aqueous solution
•Many small, nitrogen-containing molecules
•6 Na (s) + Fe2O3 (s) à 3 Na2O (s) + 2 Fe (s)
which is one is The word equation
Iron (s) + chlorine (g) à iron (III) chloride (s)
Fe(s) + Cl2(g) à FeCl3 (s)
During a chemical reaction, atoms are neither created nor destroyed
The numbers preceding the chemical formulae are coefficients. They are used to balance the reaction.
Chemical reactions can never be read in terms of grams, only in terms of particles or groups of particles (moles).
The oculomotor nerve controls muscles of the eye and eyelid
IV. The trochlear nerve
Conservation of Mass
What is wrong with this equation above? H2 (g) + O2 (g) = H2O (l)
The skeleton equation
Doesn’t it appear that one oxygen atom
coefficients represent the # of molecules
According to conservation of mass, the proper way to write this reaction is:
2H2 (g) + 1O2 (g) ® 2H2O (l)
Pascal’s Principle
•Force and pressure have a direct relationship
Pressure applied to an enclosed fluid is transmitted
equally throughout the fluid
in all directions.
The autonomic nervous system is a part of the peripheral nervous system..
One common problem is pollution
Atmospheric pressure changes with altitude.
true
false
Parts of the brain…
Any change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid.
the gray matter of the midbrain control visual reflexes and sense of hearing.
skeleton equation uses chemical formulas rather than words to identify the reactants and products of a chemical reaction
. It regulates breathing, swallowing, coughing, sneezing, vomiting, heartbeat, and blood pressure
the picture shows a ...
chemical change
Pascal’s Principle
is a Chemical Reaction
the brain
A woman’s high heels sink into the soft ground,
but the larger shoes of the much bigger man do not. why?
Pressure = chemistry and atom
Neuron = force/area
Small Area, Large Pressure
for the love
the parts of a neuron are: axon, nucleus, dendrites and electrons
false
true
in the image you can see
Formation
Evidence for a Chemical Reaction colorchange
Evidence for a Chemical Reaction
The number of synapses influences transmission
A small force F1 applied to a piston with a small
area produces a much larger force F2 on the larger
piston. This allows a hydraulic jack to lift heavy objects.
false
true
•Synthesis (Combination) is...
Air pressure acting on the mercury in the dish can support a column of mercury 76 cm in height.
Nerve impulses are transmitted via branches called synapses. The synapses are connectors… hooking dendrites and axons from one neuron to another.
This means these 2 variables change together (one goes up, the other goes up, and vice versa
Two or more simple substances (the reactants) combine to form a more complex substance (the product).
the outside membrane is the dura mater (DUR ah may ter); the middle membrane is the arachnoid (ah RACK noid); the inside membrane is the pia mater (PIE ah may ter).
false
true
