| A | B |
|---|
| A nerve cell is called a | neuron |
| The club like long mass of nervous tissue that forms the upper end of the spinal cord is called the | brainstem |
| Carry command impulses to the muscles | motor nerves |
| The brain contains for 10-100 | billion neurons |
| The cerebrum is responsible for | making decisions |
| Subconscious muscle activities like movement of the eyeball are | controlled by the midbrain |
| The brain uses 25% of | all oxygen taken in |
| The brain is 85% | water |
| The pons control | respiration |
| The outer edge of the brain is | gray |
| A long fairly thick, white sheathed tail through which a neuron sends signals to other cells | axon |
| The area at the end of the spinal cord where the nerve roots exit the spinal cord | cauda equina |
| The thick band of nerve tissue that connects the two sides of the brain is | the corpus callosum |
| The outer layer of the spinal cord is | white myelinated |
| Fibers cross over in the | medulla oblongata |
| The gap between two neurons in which the neurotransmitter works to stimulate the next neuron | synapse |
| Another name for the cerebellum | little brain |
| The largest top part of the brain | cerebrum |
| 43 pair of nerves branch from | the spinal cord |
| The brain and spinal cord are covered with | 3 layers of tissues |
| The delicate protoplasm branches through which a neuron can receive signals | dendrites |
| The cortex of the brain contains | 75% of the brains 100 billion neurons |
| Found in the space between the arachnoid and the pia mater | cerebrospinal fluid |
| Contains many blood vessels the supply nutrients and oxygen to the brain | pia mater layer |
| Carry signals from the sense organs to the brain | sensory nerves |
| Nerves conduct extremely small amount of | electricity |
