21. Homeostasis

Question 1

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What is homeostasis?

Answer 1

The condition of a relatively stable internal environment, maintained within narrow limits, in the face of external change.

Question 2

What is the condition of a relatively stable internal environment, maintained within narrow limits, in the face of external change.

Answer 2

Homeostasis

Question 3

What is the prefix for “above normal”

Answer 3

Hyper

Question 4

What is the prefix for “below normal”

Answer 4

Hypo

Question 5

What does NAD mean?

Answer 5

No abnormalities detected

Question 6

What is the abbreviation for no abnormalities detected

Answer 6

NAD

Question 7

What is the abbreviation for within normal limits?

Answer 7

WNL

Question 8

What does WNL mean?

Answer 8

Within normal limits

Question 9

What is a key term when discussing how systems maintain homeostasis?

Answer 9

Regulate

Question 10

What does the term regulate mean?

Answer 10

To make changes to ensure things are within normal limits

Question 11

What is meant by negative feedback loop?

Answer 11

The response to stimulus is in the OPPOSITE direction

eg. is something is increasing, the reaction will be to decrease

Question 12

Would you shiver or sweat in response to hyperthermia and why?

Answer 12

sweat - to decrease body temp

sweat = heat loss via evaporation

Question 13

Would you shiver or sweat in response to hyporthermia and why?

Answer 13

shiver - to increase body temp

Shiver = heat generation via movement

Question 14

Would you experience vasodilation or vasoconstriction to the organs in response to hyperthermia and why?

Answer 14

Vasoconstriction - as blood needs to be redirected to the skin to cool down

heat loss to skin via radiation

Question 15

Would you experience vasodilation or vasoconstriction to the skin in response to hypothermia and why?

Answer 15

Vasoconstriction - as blood needs to be redirected to the organs to maintain heat

heat loss to skin via radiation

Question 16

Would you experience vasodilation or vasoconstriction to the skin in response to hyperthermia and why?

Answer 16

Vasodilation - as blood needs to be redirected to the skin to cool down

heat loss to skin via radiation

Question 17

Would you experience vasodilation or vasoconstriction to the organs in response to hyporthermia and why?

Answer 17

Vasodilation - as blood needs to be redirected to the organs to maintain heat

heat loss to skin via radiation

Question 18

Do you exeprience pilo erection during hyperthermia or hypothermia?

Answer 18

Hypothermia - hairs on skin erect to trap heat

heat loss via radiation

Question 19

Is insulin or glucagon released in response to hyperglycaemia and why?

Answer 19

Insulin - increases blood glucose uptake as glycogen into cells

decreases BGL

Question 20

Is insulin or glucagon released in response to hypoglycaemia and why?

Answer 20

Glucagon - as it breaks down stored glycogen into blood glucose

increases BGL

Question 21

Does ADH release increase or decrease in response to low blood volume and why?

Answer 21

increase - to increase water absorption into the blood increasing blood volume

Question 22

Does ANP release increase or decrease in response to high blood volume and why?

Answer 22

increase - to decrease salt and water absorption into the blood decreasing blood volume

Question 23

Does aldosterone release increase or decrease in response to low blood volume and why?

Answer 23

increase - to increase salt and water absorption into the blood increasing blood volume

Question 24

Does high blood volume lead to high or lower blood pressure?

Answer 24

High

Question 25

Does low blood volume lead to high or lower blood pressure?

Answer 25

lower

Question 26

What is the most potent way to regulate blood ph?

Answer 26

Buffer system

regulation within the blood

Question 27

Which system is the buffer system part of?

Answer 27

Cardiovascular

Question 28

How does the respiratory system help regulate ph?

Answer 28

Through respiratory rate

CO2 removed through expiration

Question 29

How does the urinary system help regulate ph?

Answer 29

Through secretion in the nephron/kidney/urine formation

H+ions removed from urine in distal tubule