What is the point of a feedback loop?

To make sure the conditions in the body remain stable

To provide the body with more energy

To provide the body with more food

To make sure the conditions in the body are always changing

A feedback loop is...

The process by which a stimulus produces a response by the systems of the body (positive or negative)

The process by which an organism attempts to maintain balance with its environment

The variable kept constant during an experiment

Select ALL that are examples of positive feedback loops (tries to increase the response-only happens sometimes)

enhancing labor contractions during birth

Apples release ethylene while ripening - other apples near start ripening too

Blood pressure falls - blood pressure receptors stimulated - heart rate increases - rise in blood pressure

Body temperature rises - body starts sweating - body temperature drops

What is the purpose of negative feedback?

To REDUCE a change to bring the body back to normal state

To cause contractions during childbirth

What is an example of positive feedback?

Causing contractions during childbirth

Sweating to cool down in hot weather

Shivering to generate heat in cold weather

Increasing blood glucose levels

Select ALL that are examples of negative feedback loops (reverses changes and is happening 24/7, every second of an organisms life)

Blood pressure falls - blood pressure receptors stimulated - heart rate increases - rise in blood pressure

Body temperature rises - body starts sweating - body temperature drops

enhancing labor contractions during birth

Apples release ethylene while ripening - other apples near start ripening too

Sam wants to see if feeding his dog MaxPro will make it swim faster than the regular dog food. What is the dependent variable?

There is not enough information given

Where can carbohydrates be found when part of a plasma membrane?

Embedded part of the way into the membrane

Embedded the whole way through the membrane

Define plasma membrane

flexible boundary of a cell that separates a cell from its surroundings

lipid that helps minimize effects of temperature

only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

What is the "big idea" of the fluid mosaic model of plasma membranes?

a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.

the plasma membrane creates a specialized FLUID that looks like a MOSAIC.

the plasma membrane is a MOSAIC.

the fluid mosaic model is NOT related to the plasma membrane.

What does "hydrophobic" mean?

water fearing, does not associate with water

water loving, associates with water

an example would be solutes like sugar or salt

What does "hydrophilic" mean?

water loving, associates with water

water fearing, does not associate with water

an example would be solutes like oil or fat

What is the function of B?

Cell to cell communication and cell recognition

Keeps the phospholipid tails from sticking together - allows for the fluidity of the cell membrane

Allow substances to enter and exit the cell

Provides structure to the cell memebrane

What is the function of E?

Allow substances to enter and exit the cell

Cell to cell communication and cell recognition

Keeps the phospholipid tails from sticking together - allows for the fluidity of the cell membrane

Provides structure to the cell memebrane

What is the function of C?

Provides structure to the cell memebrane

Cell to cell communication and cell recognition

Keeps the phospholipid tails from sticking together - allows for the fluidity of the cell membrane

Allow substances to enter and exit the cell

What is the function of F?

Keeps the phospholipid tails from sticking together - allows for the fluidity of the cell membrane

Cell to cell communication and cell recognition

Allow substances to enter and exit the cell

Provides structure to the cell memebrane

Homeostasis and the Plasma Membrane

Quiz

•

Science

•

9th - 12th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-LS1-3, MS-LS1-5, MS-PS2-2

+4

Standards-aligned

Ashley Bryant

Used 29+ times

FREE Resource

52 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of feedback loop is shown?

Positive

Neutral

Negative

Tags

NGSS.HS-LS1-3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The reaction/effect of a given stimulus is the...

response

stimulus

cause

result

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The event that causes something to happen is the

response

effect

stimulus

homeostasis

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

NGSS.MS-LS3-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of feedback loop is shown?

negative

neutral

positive

Tags

NGSS.HS-LS1-3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Failure to maintain homeostasis could result in:

lack of internal balance

eventual death

difficulty carrying on metabolism

all three

Tags

NGSS.HS-LS1-3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The two types of feedback systems that help organisms maintain homeostasis are:

positive and negative

receptor and effector

static and dynamic

minor and major

Tags

NGSS.HS-LS1-3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Maintaining body temperature is an example of a:

negative feedback loop

positive feedback loop

Tags

NGSS.HS-LS1-3

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Homeostasis and the Plasma Membrane

52 questions

What type of feedback loop is shown?

The reaction/effect of a given stimulus is the...

The event that causes something to happen is the

What type of feedback loop is shown?

Failure to maintain homeostasis could result in:

The two types of feedback systems that help organisms maintain homeostasis are:

Maintaining body temperature is an example of a:

When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels.

What is the point of a feedback loop?

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

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