Core Terminology 8: Endocrine and homeostasis Flashcards Preview

Gd 12 LS 2018 > Core Terminology 8: Endocrine and homeostasis > Flashcards

Flashcards in Core Terminology 8: Endocrine and homeostasis Deck (23):
1

Coordination

linking together of various organs & systems in the body for harmonious functioning (homeostasis)

2

Endocrine gland

ductless glands that secretes hormones

3

Exocrine gland

glands with ducts, secretes secretions eg. Salivary & sweat glands

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Target organ

specific place/area where hormone has its effect

5

Homeostasis

The maintenance of a constant internal environment in the human body within certain limits

6

Negative feedback mechanism

a control system in which the final effect of the system work against the original system; to maintain an internal balance/homeostasis/regulate metabolism

7

Aldosterone

A hormone which regulates the salt balance in the human body

8

Thermoregulation

regulation of body temperature

9

Ectothermic

group of animals with temperature that varies with environmental temperature; dependent on external heat source

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Endothermic

group of animals maintaining a constant body temperature; irrespective of environmental temperature; heat source from inside the body

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Homeostasis

maintaining a constant internal environment

12

Tissue fluid

fluid surrounding the tissues of the body

13

Hyperthermic

the condition suffered by a person when the core body temperature is raised so much that the body?s homeostatic control mechanism can no longer cope.

14

Hypothermic

the condition suffered by a person when the core body temperature is lowered so much that the body?s homeostatic control mechanism can no longer cope.

15

Epidermis

top layer of skin; contains sweat pores and sebaceous glands

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Dermis

bottom layer of skin that contains the blood vessels, sweat and sebaceous glands

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Erector muscle

muscle that joins each hair to the epidermis

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Hypothalamus

homeostatic control centre in brain

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Vasoconstriction

condition when arterioles in skin constrict; less blood flows to surface of skin

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Vasodilation

condition when arterioles in skin dilates; allowing more blood to flow to skin

21

Thermoreceptors

heat sensitive receptors in skin

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Heat-exchange mechanism

a mechanism to transfer heat from one fluid to another without having direct contact.

23

Negative feedback mechanism

a control system in which the final effect of the system work against the original system.