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PHYSIOLOGY STACK 2
| Question | Answer |
|---|---|
| What are two main types of synapses? | 1. Chemical Synapses 2. Electrical Synapses |
| Name one neurotransmitter from each main class | Acetylcholine, Glutamate, Endorphins, Nitric Oxide |
| Trace the pathway of oxygenated and deoxygenated blood through the chambers of the heart | Deoxygenated blood: Body → Superior/Inferior Vena Cava → Right Atrium → Tricuspid Valve → Right Ventricle → Pulmonary Valve → Pulmonary Arteries → Lungs. Oxygenated blood: Lungs → Pulmonary Veins → Left Atrium → Mitral (Bicuspid) Valve → Left Ventricle |
| The difference between innate and adaptive immunity | Innate immunity is your general, fast defense system (like skin and inflammation) that you're born with. Adaptive immunity is your specific, smart defense (like antibodies) that learns and remembers specific germs after you encounter them. |
| What is inflammation? | Inflammation is the body's general alarm and response to injury or infection. It causes redness, swelling, and heat to bring more blood and healing cells to the damaged area. |
| How do we breathe in and out? | Breathing in (inhale): Your diaphragm muscle flattens and your ribcage expands, sucking air into your lungs. Breathing out (exhale): Your diaphragm and ribs relax, pushing air back out. |
| What's the difference between mechanical and chemical digestion? | Mechanical digestion is physical breaking (chewing, stomach churning). Chemical digestion uses enzymes and acids to break food down into tiny molecules your body can absorb. |
| What do B-cells and T-cells do? | B-cells make antibodies that stick to and tag germs for destruction. T-cells either directly destroy infected cells or help coordinate the rest of the immune attack. |
| What is the main job of the small intestine? | nutrient absorption. |
| What's the difference between your "fight-or-flight" and "rest-and-digest" systems? | "Fight-or-flight" (Sympathetic) prepares your body for stress or danger. "Rest-and-digest" (Parasympathetic) calms the body down for routine functions like digestion. |
| Peristalsis | Propulsive movement. Involves waves of contraction and relaxation that push food forward along the GI tract (esophagus, stomach, small/large intestine). |
| Segmentation | Mixing movement. Primarily in the small intestine. Involves alternating contractions that "chop" the chyme, mixing it with digestive juices and bringing it into contact with the mucosa for absorption. It does not propel material in one direction. |
| How do electrical signals jump quickly along some nerves? | Through saltatory conduction |