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WorksheetsNervous system
Total questions: 25
Worksheet time: 14mins
As organisms get more complex, cells become specialized to perform specific functions in the body. What is the function for the cell shown?
contract and shorten movement
provide coverage and protection
carry impulses around the body
connects parts together
The human brain is made of 100 billion neurons. Each neuron has a nucleus that contains genes. Many neurons bind together to form a nerve ______.
tissue
system
organ
cell
Which system is responsible for the overall control of all the internal processes that occur in the body?
muscular system
nervous system
digestive system
skeletal system
The brain has 4 major sections that send and receive signals to control all the activities that keep a person functioning efficiently. Which major section controls breathing and heart beat?
cerebellum
diencephalon
brain stem
cortex
What is the resting potential of a typical neuron?
-70mV
0mV
+30mV
+70mV
What does the sodium-potassium pump do?
Uses no energy to move three sodium ions out of the cell for every two potassium ions it brings in.
Uses energy to move three sodium ions out of the cell for every two potassium ions it brings in.
Uses no energy to move two sodium ions out of the cell for every two potassium ions it brings in.
Uses energy to move two sodium ions out of the cell for every two potassium ions it brings in.
How does the cell maintain the negative concentration gradient during resting potential?
By not allowing ions to pass through the membrane.
By freely allowing ions to pass through the membrane.
By letting potassium leak into the neuron.
By pumping potassium into the cell while pumping sodium out.
What is an ion?
Electrical signals inside the body.
Electrically charged chemical molecule.
Semi-permiable membranes.
The axon.
What is an action potential?
The changing polarization which travels down the axon away from the cell body to the synapse.
The threshold event which releases the neurotransmitters into the post-synaptic neuron's dendrites to create homeostasis.
When a photon of light hits a photoreceptor and a signal is sent to the brain letting the brain know that light has been detected.
When you reflexively move your hand away from a hot stove when you have been burned.
What is the synapse?
The neurotransmitter transporter.
The gap between neurons.
The dendrite.
The axon.
Why is Santiago Ramón y Cajal famous?
He invented the axon.
He proposed that there were gaps between neurons.
He did the first dissection of the giant squid showing they have neurons.
He discovered the connection between brain and personality in Spain.
