The body’s way of keeping things stable inside (like temperature, pH, blood pressure), even when the outside changes.

Negative feedback loop

A process that reverses a change to bring the body back to normal (ex. sweating when hot to cool down).

Positive feedback loop

A process that increases a change (ex. during childbirth, contractions increase until birth).

Proteins that speed up chemical reactions in the body.

Key functions of enzymes?

Speed up (catalyze) reactions,Work best at specific temperatures & pH,Are reusable.

What are the 3 main layers of skin?

Epidermis – outer layer Dermis – middle layer Hypodermis – deepest layer

How many Strata are in the epidermis?

5 strata, Stratum basale, Stratum spinosum, Stratum granulosum, Stratum lucidum , Stratum corneum

Main functions of the skin?

Protects, regulates temp, senses, excretes waste, makes vitamin D

When muscles or bones shrink or get weaker because they’re not being used.

When muscles or bones grow bigger and stronger because they’re used a lot or exercised.

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Stephanie Echaves

Physiology 1-6

Terms and Questions	Definition and Answers
Homeostasis	The body’s way of keeping things stable inside (like temperature, pH, blood pressure), even when the outside changes.
Negative feedback loop	A process that reverses a change to bring the body back to normal (ex. sweating when hot to cool down).
Positive feedback loop	A process that increases a change (ex. during childbirth, contractions increase until birth).
Enzymes	Proteins that speed up chemical reactions in the body.
Key functions of enzymes?	Speed up (catalyze) reactions,Work best at specific temperatures & pH,Are reusable.
What are the 3 main layers of skin?	Epidermis – outer layer Dermis – middle layer Hypodermis – deepest layer
How many Strata are in the epidermis?	5 strata, Stratum basale, Stratum spinosum, Stratum granulosum, Stratum lucidum , Stratum corneum
Main functions of the skin?	Protects, regulates temp, senses, excretes waste, makes vitamin D
Atrophy	When muscles or bones shrink or get weaker because they’re not being used.
Hypertrophy	When muscles or bones grow bigger and stronger because they’re used a lot or exercised.

Created by: stephaniee0240

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