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Category: Physiology

How Nociceptors Differentiate Pain from Touch or Pleasure

Nociceptors are specialized to detect harmful or potentially damaging stimuli, such as extreme heat, cold, pressure, or chemical changes in...

Does the brain have the power to block pain signals, or is it obligated to always transmit them?

While pain is a critical protective mechanism, the brain has the ability to regulate how much pain is felt through...

Pain: Is it an Illusion?

While the body part that is injured or affected sends signals via nerves to the brain, the actual experience of...

Why Are Stress Hormones Released during Digestion?

Stress hormones are primarily released during digestion not because digestion itself is inherently stressful, but rather as a preparatory response...

Why Is the Blood Thicker in the Morning?

Blood tends to be thicker, or more viscous, in the morning due to several physiological factors that occur during sleep...

If the skin is a barrier to prevent absorption of chemicals into the body, how beauty product are absorbed by the skin?

The skin is indeed a barrier, but it's a selectively permeable one. While it effectively prevents many harmful substances from...

I heard that we lose electrolytes when we sweat. Can’t the skin absorb the electrolytes back to the body?

While it's true that we lose electrolytes through sweat, the skin's ability to reabsorb them is very limited. The skin...