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Final Review
| Term | Definition |
|---|---|
| Action Potential | membrane potential of an active neuron |
| Neurotransmitters | chemical messengers in the body that transmit signals from nerve cells |
| Purkinjie fibers | fibers that carry stimulation throughout the ventricles |
| Veins | carry blood to the heart |
| Arteries | carry blood away from the heart |
| Endothelium | innermost lining of blood vessels |
| Interstitial fluid | fluid in the spaces between cells |
| B lymphocytes (B cells) | produce antibodies; mature in the bone marrow |
| Bronchioles | Smallest branches of the bronchial tree |
| Inspiration | Breathing in |
| Expiration | Breathing out |
| Emphysema | A disease resulting in the alveoli losing their ability to expand and contract |
| Tidal volume | The amount of air which enters the lungs during normal inhalation at rest |
| Respiratory cycle | The events that occur during one breath; inhalation + exhalation = 1 respiratory cycle. |
| Respiratory volume | The amount of air inhaled, exhaled and stored within the lungs at any given time |
| Inspiratory reserve volume | The maximal amount of additional air that can be drawn into the lungs by determined effort after normal inspiration |
| Expiratory reserve volume | The additional amount of air that can be expired from the lungs by determined effort after normal expiration |
| Total lung capacity | The inspiratory capacity plus the functional residual capacity; that is, the volume of air contained in the lungs at the end of a maximal inspiration; also equals vital capacity plus residual volume |
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