Nervous system introduction
The nervous system is divided into _________and ___________.
What is the central nervous system and the peripheral nervous system.
________ are the main cells of the nervous system.
What are neurons?
__________ is a long rod of nervous tissue that extends down from the brainstem to the lumbar region of the vertebral column.
What is the spinal cord?
the central nervous system includes _____________ and ___________.
What are the brain and spinal cord?
_______ are the functional units of the nervous system. Responsible for generating and conducting impulses
What are Neurons, or nerve cells?
_____________ brings sensory information from the outside into the central nervous system, and includes visual receptors, auditory receptors, chemoreceptors, and somatosensory or touch receptors.
What is the afferent division?
Where two neurons come together is called a __________.
What is synapse?
The cell body contains most of the usual organelles, such as _____________________.
What is Golgi apparatus, mitochondria, and lysosomes?
There are many functions of connective tissue. Can you name three?
Bind structures
Provide support and protection
Serve as frameworks
Fill spaces
Store fat
Produce blood cells
Protect against infections
Help repair tissue damage
Neurotransmitters transmit one of three possible actions in their messages, depending on the specific neurotransmitter:
What is excitatory, inhibitory, and modulatory?
The nervous system is made up of two main types of cells: _______________.
What are neurons and glial cells?
The brain has a few regions - the most obvious is the ___________, which is divided into two cerebral hemispheres.
What is cerebrum?
they are the neurons that tell your body to perform an action, such as removing your hand from a hot pan.
what are efferent neurons?
__________ neurotransmitters block or prevent the chemical message from being passed along any farther.
What are inhibitory neurotransmitters?
Where are nervous tissue found
Brain
Neurons have some common features. They all have three distinct regions:
What are a cell body (soma), dendrites, and axon?
____________ helps with coordinating movement, precision, and balance.
What is the cerebellum?
The peripheral nervous system is divided into ___________________________.
What are the somatic and autonomic nervous systems?
The peripheral nervous system includes ______________ to the muscles and organs.
What are all the nerves that connect the central nervous system?
What are nerve cells called?
Neurons
____________neurotransmitters “excite” the neuron and cause it to “fire off the message,” meaning, the message continues to be passed along to the next cell.
What is excitatory?
The brainstem is made up of three parts, _______________ and it connects to the spinal cord.
What is the midbrain, pons, and medulla?
Are multipolar and conduct impulses out of the brain or spinal cord to effectors. _____________ control muscle contraction and the secretions of glands.
What are motor impulses?
_______________ are chemical messengers that your body can’t function without. Their job is to carry chemical signals (“messages”) from one neuron (nerve cell) to the next target cell.
What are neurotransmitters?
What are peripheral nerves?
Nerve branches off of the brain and spinal cord