Core Terminology 8: Endocrine and homeostasis Flashcards

1
Q

Coordination

A

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

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2
Q

Endocrine gland

A

ductless glands that secretes hormones

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3
Q

Exocrine gland

A

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

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4
Q

Target organ

A

specific place/area where hormone has its effect

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5
Q

Homeostasis

A

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

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6
Q

Negative feedback mechanism

A

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

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7
Q

Aldosterone

A

A hormone which regulates the salt balance in the human body

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8
Q

Thermoregulation

A

regulation of body temperature

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9
Q

Ectothermic

A

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

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10
Q

Endothermic

A

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

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11
Q

Homeostasis

A

maintaining a constant internal environment

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12
Q

Tissue fluid

A

fluid surrounding the tissues of the body

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13
Q

Hyperthermic

A

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.

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14
Q

Hypothermic

A

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.

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15
Q

Epidermis

A

top layer of skin; contains sweat pores and sebaceous glands

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16
Q

Dermis

A

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

17
Q

Erector muscle

A

muscle that joins each hair to the epidermis

18
Q

Hypothalamus

A

homeostatic control centre in brain

19
Q

Vasoconstriction

A

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

20
Q

Vasodilation

A

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

21
Q

Thermoreceptors

A

heat sensitive receptors in skin

22
Q

Heat-exchange mechanism

A

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

23
Q

Negative feedback mechanism

A

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