GEN BIO QUARTER

Question 1

what is the main purpose of a feedback mechanism in biological systems?

Answer 1

to maintain homeostasis

Question 2

which of the following is an example of negative feedback

Answer 2

body temperature regulation

Question 3

what is the key characteristic of a negative feedback loop

Answer 3

it opposes the initial change

Question 4

which organ plays a major role in regulating blood glucose levels through negative feedback

Answer 4

liver

Question 5

when blood sugar levels rise the body releases which hormone to lower it

Answer 5

insulin

Question 6

what happens when body temperature drops too low

Answer 6

shivering occurs to generate heat

Question 7

which of the following is an example of positive feedback

Answer 7

milk production during breastfeeding

Question 8

in childbirth which hormone intensifies contractions in a positive feedback loop

Answer 8

oxytocin

Question 9

which part of the brain is responsible for many homeostastic feedback mechanisms

Answer 9

hypothalamus

Question 10

the body’s response to high carbon dioxide levels in blood involves

Answer 10

slower breathing, increase breathing rate

Question 11

what is the effect of negative feedback on a system

Answer 11

it stabilizes the system

Question 12

if a person is dehydrated the body will

Answer 12

decrease urine output

Question 13

which of the following hormones is not involved in a feedback mechanism

Answer 13

melanin

Question 14

which gland is responsible for regulating metabolism via negative feedback

Answer 14

thyroid gland

Question 15

how does the hypothalamus help regulate body temperature

Answer 15

by controlling sweat and shivering responses

Question 16

which of the following is an example of a system out of homeostasis

Answer 16

uncontrolled high blood pressure

Question 17

during high intensity exercise which feedback mechanism prevents overheating

Answer 17

increased sweating

Question 18

what organ primarily controls the water balance in the body

Answer 18

kidney

Question 19

what feedback mechanism is responsible for regulating blood pressure

Answer 19

negative feedback

Question 20

how does the pancreas response to low blood sugar levels

Answer 20

by releasing glucagon

Question 21

t/f
negative feedback amplifies changes in the body

Answer 21

false

Question 22

t/f
positive feedback loops usually lead to rapid and short term changes

Answer 22

true

Question 23

t/f
the endocrine system plays a major role in feedback mechanisms

Answer 23

true

Question 24

t/f
blood clotting is an example of negative feedback

Answer 24

false

Question 25

t/f homeostasis refers to the body's ability to maintain a stable internal environment

Answer 25

true

Question 26

t/f the body uses negative feedback to regulate blood pressure

Answer 26

true

Question 27

t/f sweating during exercise is an example of positive feedback

Answer 27

false

Question 28

t/f the hypothalamus is involved in thermoregulation

Answer 28

true

Question 29

t / f the release of insulin in response to high blood sugar is an example of positive feedback

Answer 29

false

Question 30

t/f feedback mechanisms only occur in humans

Answer 30

false

Question 31

the process of maintaining a stable internal environment is called _

Answer 31

homeostasis

Question 32

a negative feedback loop works to _ a change in the body

Answer 32

reverse

Question 33

the release of oxytocin during labor is an example of _ feedback

Answer 33

positive

Question 34

the _ helps regulate body temperature to feedback mechanisms

Answer 34

hypothalamus

Question 35

in response to low blood sugar the pancreas releases

Answer 35

glucagon

Question 36

when a person is overheated there's wet glands become _ to hold the body down

Answer 36

active

Question 38

is a biological example of a positive feedback loop

Answer 38

blood clotting

Question 39

the hormone responsible for decreasing blood sugar is

Answer 39

insulin

Question 40

when body temperature rises blood vessels _ to release heat

Answer 40

dilate

Question 41

the kidneys help maintain _ through negative feedback

Answer 41

water balance