feedback mechanism

Question 1

homeostasis is derived
from two Greek words

Answer 1

homoios, stasis

Question 2

homoios, meaning

Answer 2

“same”

Question 3

stasis, meaning

Answer 3

“standing still”

Question 4

When a change in the environment
upsets this state of balance, the body
senses the change and response by trying
to reestablish the balance.

Answer 4

true

Question 5

responsible in the
regulation and maintenance of the
internal environment of the body

Answer 5

homeostasis

Question 6

It regulates body temperature, fluids,
salts, acids, gases and nutrients that help
support human life.

Answer 6

homeostasis

Question 7

homeostatic control mechanisms

Answer 7

how the body changes the internal environment

(during exercise the body needs more oxygen and produces more carbon dioxide)

Question 8

more oxygen in, more carbon dioxide out

breathing increase
heartbeat and croke volume increase

Answer 8

homeostatic controlmechanisms

Question 9

-nervous impulses
-chemical messengers

Answer 9

feedback control loops

Question 10

work in same way, have same basic components

Answer 10

-nervous impulses
-chemical messengers

Question 11

4 main components of feedback control loops

Answer 11

sensor mechanism
integrator/control center
effector mechanism
feedback

Question 12

can act as sensors
transmits signal to integrator

Answer 12

glands and nerve cell

(sensor mechanism, integrator/control center)

Question 13

in integrator/control center, ____ is normal range for this variable

Answer 13

setpoint

Question 14

provide response desired
change values of variables
can be positive/negative value change

Answer 14

effector mechanism (glands and muscles)

Question 15

check values of variables against the allowable set point range

Answer 15

true

Question 16

are responses that
trigger other activities or processes.

Answer 16

Feedback mechanisms

Question 17

is a control system to
reduce any changes or
conditions of the body, helps the
whole body system to be stable.

Answer 17

Negative Feedback

Question 18

involves a response
that is the reverse of the change
detected.

Answer 18

Negative Feedback

Question 19

A change is detected by a receptor and an effector
is activated to induce an opposite effect – this
promotes _______

Answer 19

equilibrium.

Question 20

The term ___ is a deviation
from set point.

Answer 20

negative

Question 21

The ____ refers to the normal value
and ideal requirement of the body to
maintain homeostasis.

Answer 21

set point

Question 22

Do not think that the term negative
feedback refers to something that can
harm the body. In homeostasis, it simply
means bringing conditions back to normal.

Answer 22

true

Question 23

____is a process that allows
your body to maintain its core internal
temperature.

Answer 23

Thermoregulation

Question 24

is the maintenance of
constant osmotic pressure in the fluids of
an organism by the control of water and
salt concentrations.

Answer 24

Osmoregulation

Question 25

– is a hormone that helps your kidneys manage the amount of water in your body.

Answer 25

Antidiuretic Hormone (ADH)

Question 26

– are two bean-shaped organs that extract waste from blood, balance body fluids, form urine and aid in other important functions of the body.

Answer 26

Kidneys

Question 27

in ______, the concentration of water is more as compared to its solutes, whereas in _____, the concentration of water is low as compared to its solutes.

Answer 27

hypotonic urine hypertonic urine

Question 28

_______-is the maintenance of steady levels of glucose in the body; it is part of homeostasis and so keeps a constant internal environment around cells in the body.

Answer 28

Glucoregulation

Question 29

____ – sugar that comes from the foods we eat formed and stored inside the body, main source of energy for the cells of our body and its carried to each cell through the bloodstream.

Answer 29

Blood Glucose

Question 30

____– a hormone produced in the pancreas which regulates the amount of glucose in the blood

Answer 30

Insulin

Question 31

– is a long, flat gland that lies in the abdomen behind the stomach. It helps in digestion and regulates blood sugar

Answer 31

Pancreas

Question 32

___- – is the shrinkage or contraction of a cell when it is expose to a hypertonic solution (a solution with a lower water potential than the cell) due to water loss by osmosis

Answer 32

Crenation

Question 33

– Stored form of glucose.

Answer 33

Glycogen

Question 34

– is a hormone formed in the pancreas which promotes the breakdown of glycogen to glucose in the liver.

Answer 34

Glucagon

Question 35

occurs when a response increases a stimulus. original stimulus is promoted rather than negated

Answer 35

Positive Feedback

Question 36

– a hormone released by the pituitary gland that causes increased contraction of the uterus during labor and stimulates the ejection of milk into the ducts of the breasts.

Answer 36

Oxytocin

Question 37

Before a woman ovulates, the hormone estrogen is released by the ovary.

Answer 37

true

Question 38

The estrogen travels to the brain, which causes gonadotropin-releasing hormone (GnRH) to be released from the hypothalamus and LH to be released from the pituitary gland

Answer 38

true

Question 39

____ causes more estrogen to be released from the ovary, which in turn causes an increase in GnRH and LH in the bloodstream through positive feedback

Answer 39

LH

Question 40

The rise in GnRH and LH hormones, along with follicle-stimulating hormone (FSH), causes ovulation to occur.

Answer 40

true

Question 41

When a part of the body is injured, it releases chemicals that activate blood platelets.

Answer 41

blood clotting

Question 42

___ are responsible for stopping bleeding by forming clots. An activated platelet in turn activates more platelets, which group together to form a blood clot.

Answer 42

Platelets