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20 results for “henna certain”
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🦠 Listening to the Hidden City Within: Understanding the Gut Microbiome
From section: 💡 Did you know?🧪 Some microbes help transform environmental compounds. Certain gut microorganisms can modify xenobiotics, which are substances originating outside the body. …
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🌫️ Why We Get Hiccups: The Reflex Beneath Every Small “Hic”
From section: 🐾 Evolutionary echoes: infants, amphibians, and possible originsAnother hypothesis looks further back in evolutionary history. Some researchers have noted that the pattern of muscle contraction and airway closure in hiccups resembles movements used by certain amphibians and lungfish to move water across gills while protecting air-breathing structures.
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🧠 Where Awareness Takes Shape: Synapses, Brain Networks, and Consciousness
From section: 💡 Did you know?👁️ In certain cases of visual brain injury, a person can distinguish a stimulus in an affected part of the visual field better than chance while reporting no clear sight of it. Called blindsight, this phenomenon helps researchers separate processing a signal from consciously seeing it. …
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🦟 Beyond the Bite: How Dengue Fever Affects the Body
From section: 🔬 The first changes unfold beneath the skinLike other viruses, dengue virus must enter susceptible cells to reproduce. Among its targets are certain immune cells, including cells in the skin that normally help detect unfamiliar material and coordinate a response. …
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🌾 Scrub Typhus: When a Tiny Bite Becomes a Fever
From section: 🌿 An unseen encounter among the leavesScrub typhus is a bacterial infection transmitted by the bite of certain infected chiggers, the larval stage of mites. Chiggers are mites, not ticks. In much of the illness's established range, the bacterium responsible is Orientia tsutsugamushi.
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🌫️ When the World Blurs for a Moment: Why We Sneeze
From section: Frequently Asked Questions+Why do some people sneeze when they smell strong perfumes or cleaning products? Chemical sensitivity in trigeminal pathways may cause certain strong odors to activate the sneeze reflex.
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🌿 Why We Stretch When We Wake: The Quiet Reflex that Resets the Body
From section: 🌅 The body in stillness and the need for a resetDuring sleep or prolonged sitting, the body enters a state of reduced activity. Muscle tone decreases, circulation slows in certain regions, and sensory input becomes quieter. These changes are part of normal physiology, yet they create conditions in which a reset becomes useful when movement resumes. …
- The Perpetually Curious! › Canonical › Biology & HealthArticle
😮💨 When A Breath Becomes a Yawn: Why We Yawn and What This Quiet Reflex May Reveal
From section: 💡 Did You Know🧠 Neurotransmitters may influence yawning. Research suggests that dopamine, oxytocin, and certain other neurotransmitters may modulate yawning frequency in animals, although the exact pathways are still being studied.
- The Perpetually Curious! › Canonical › Biology & HealthArticle
🌡️ When the Skin Remembers the Cold: Why We Get Goosebumps
From section: 🐾 Fear, Threat, and the Appearance of SizeIn many mammals, piloerection appears not only in the cold but also during moments of fear, aggression, or heightened alertness. When a cat arches its back and its fur stands on end, or when certain primates fluff their hair during a confrontation, they are using piloerection to increase their apparent size. …
- The Perpetually Curious! › Archives › Biology & HealthArticle
✋ Palm Lines Explained: The Quiet Folds That Help the Hand Move
From section: Why palm lines begin before the hand is usedIn medicine, certain crease patterns may be noted as one feature among many, but a palm line by itself is not a diagnosis.
