Core Terminology 8: Endocrine and homeostasis

Question 1

Coordination

Answer 1

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

Question 2

Endocrine gland

Answer 2

ductless glands that secretes hormones

Question 3

Exocrine gland

Answer 3

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

Question 4

Target organ

Answer 4

specific place/area where hormone has its effect

Question 5

Homeostasis

Answer 5

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

Question 6

Negative feedback mechanism

Answer 6

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

Question 7

Aldosterone

Answer 7

A hormone which regulates the salt balance in the human body

Question 8

Thermoregulation

Answer 8

regulation of body temperature

Question 9

Ectothermic

Answer 9

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

Question 10

Endothermic

Answer 10

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

Question 11

Homeostasis

Answer 11

maintaining a constant internal environment

Question 12

Tissue fluid

Answer 12

fluid surrounding the tissues of the body

Question 13

Hyperthermic

Answer 13

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.

Question 14

Hypothermic

Answer 14

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.

Question 15

Epidermis

Answer 15

top layer of skin; contains sweat pores and sebaceous glands

Question 16

Dermis

Answer 16

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

Question 17

Erector muscle

Answer 17

muscle that joins each hair to the epidermis

Question 18

Hypothalamus

Answer 18

homeostatic control centre in brain

Question 19

Vasoconstriction

Answer 19

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

Question 20

Vasodilation

Answer 20

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

Question 21

Thermoreceptors

Answer 21

heat sensitive receptors in skin

Question 22

Heat-exchange mechanism

Answer 22

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

Question 23

Negative feedback mechanism

Answer 23

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