Homeostasis

Question 1

What is homeostasis?

Answer 1

concept of maintaining a relatively stable internal environment according to external changes that we face.

Question 2

internal environment is composed of _______?

Answer 2

interstitial fluid

Question 3

Cell?

Answer 3

smallest unit of life

Question 4

Metabolism

Answer 4

chemical reaction that happens within the cells

Question 5

What is interstitial fluid?

Answer 5

from where the cells obtain the nutrients and in which the cells eliminate the waste

Question 6

____% of interstitial fluid forms adult body weight?

Answer 6

16%

Question 7

system that play the principal role in maintain the consistency of interstitial fluid?

Answer 7

Cardiovascular system

Question 8

how does cardiovascular system maintain interstitial fluid consistency?

Answer 8

circulation of blood brings fresh materials to cells and remove the waste products from cells.

Question 9

where does interstitial fluid if formed from and gets resorbed?

Answer 9

from the blood

Question 10

Role of respiratory system related to blood?

Answer 10

brings oxygen to the blood and remove waste gas carbon dioxide from the blood

Question 11

Role of digestive system related to blood?

Answer 11

brings nutrients to blood such as glucos

Question 12

Role of urinary system related to blood?

Answer 12

remove waste (other than carbon dioxide) from the blood and eliminates them to the external environment.

Question 13

what is controlled condition meanse?

Answer 13

variables that body regulates or balance are called…

Question 14

name the controlled conditions are regulated by Homeostatic control mechanisms

Answer 14

temperature 
water balance 
electrolyte balance
blood ph (level of acidity)
blood glucose level
blood pressure

Question 15

what is homeostasis mechanism means?

Answer 15

it’s an internal communication between nervous system and endocrine system.

Question 16

components of homeostasis mechanism.

Answer 16

Receptor
Control centre
Effectors

Question 17

Receptors?

Answer 17

respond to a stimulus, that then causes a change in a controlled condition. this is sent to the control centre. so its an input for the control centre. (are in nerves)

Question 18

Control centre

Answer 18

determine the appropriate output according to the input it receives (hypothalamus in brain)

Question 19

Effectors

Answer 19

are the means in which the control centre regulates the controlled condition (nerves to muscle and glands)

Question 20

What is negative feedback?

Answer 20

control centre wants to reverse the change in the controlled conditions. wants to bring the conditions back to normal stage.

Question 21

What is positive feedback?

Answer 21

where the controlled condition increased or intensified until the end result is reached and the feedback loop is terminated.

Question 22

example of negative and positive feedback

Answer 22

negative: body temperature is high so we sweat to cool the body temperature down.
positive: babies birth

Question 23

what affects the persons controlled condition?

Answer 23

external and internal stimuli

Question 24

Principle of feedback

Answer 24

Receptors respond to a stimulus, input to the control centre then output to the effectors.

Question 25

what is stimuli?

Answer 25

anything that can change the controlled condition is called stimuli

Question 26

Thermoreceptors

Answer 26

temperature

Question 27

osmoreceptors

Answer 27

blood osmolarity

Question 28

hypothalamus.

Answer 28

part of the brain where the control centre for temperature is located.

Question 29

hypothermia

Answer 29

low temperature

Question 30

hyperthermia

Answer 30

high temperature