Embeded Suggestion

Accepted at 11:05 p.m. May, 31, 2026 by Brian_BH

Author: aseth3

Accepted at 11:05 p.m. on May 31, 2026 by Brian_BH

Type of change: Updated content

Rationale for change

1) Epidermis 2) Arrector pili muscle (smooth) 3) Hair follicle 4) Dermis
A layer of warm air accumulated around the hair and isulate the body

****piloerection via arrector pili is SMOOTH muscle, while shivering is due to SKELETAL muscle (both involuntary contractions)****

Updated muscle type for clarity.

Before After

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Extra

Lecture Notes

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Missed Questions

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Pixorize

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Sketchy

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Additional Resources

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#AK_MCAT_v2::#Kaplan::Biology::Ch-10-Homeostasis AnkiHub_Subdeck::AnKing-MCAT::Biology #AK_MCAT_v2::#KhanAcademy::Foundation3-Organ-Systems::Integumentary-System #AK_MCAT_v2::AK_Original_Decks::MileDown::Biology::Thermoregulation #AK_MCAT_v2::#UWorld_Books::Biology::Ch-19-Skin_Structure #AK_MCAT_v2::#AAMC::Concepts::B/B::Foundational_Concept_03::3B-Structure_and_Function_of_Organ_Systems !AK_UpdateTags::^temporary::ImageFix_MCAT::13::done #AK_MCAT_v2::#KhanAcademy::Biology::Organ-Systems::Thermoregulation

Hot	-Vasodilation: arterioles widen (dilate), allowing more blood to enter skin capillaries and causing heat to escape. -Sweating: when water changes states, sudorific glands release sweat that absorbs heat. -Pilorelaxation: the hairs flatten as a result. -Stretching Out: by opening up, the body was a larger surface area.
Cold	-Vasoconstriction: arterioles shrink to keep the core warm by reducing blood flow to the skin. -Shivering: skeletal muscles contract and relax quickly. heat generated by respiration. -Piloerection: skin hairs stand up. -Curling Up: making yourself smaller so smaller surface area.