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Homeostasis Lesson
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8th grade
Biology, Science
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36 slides

Homeostasis Lesson

Body text

Keeping it cool (or warm)!

  • The human body tries to keep itself around 98.6 Deg F

  • If it gets too hot or too cold important chemicals in the body will be destroyed and functions won't work.

  • How does it do it?

Homeostasis

  • All organisms have adaptations that help keep them stable in their environment.

  • This is known as Homeostasis

  • Homeostasis is the tendency of a system to seek a stable condition, usually by compensating for changes.

Human Adaptations

  • If it gets too hot, our body secrets sweat. As it evaporates we cool off.

  • If it gets too cold, our body shivers which heats itself up.

  • There are even more adaptations than that!

Homeostasis is not just about temperature!

  • Organisms and systems have processes in place tom ake sure there is not too much or too little...

  • Water

  • Oxygen or cacarbon dioxide

  • And many other things

Q.

What is another word that can be used to describe "homeostasis"?

answer choices

STABLE

EQUAL

COMPLETE

CORRECT

Q.

In what ways does a human body work to maintain homeostasis while exercising? Choose all that apply.

answer choices

sweating

breathing heavily

going to a warmer area

Q.

Which action is an example of an organism maintaining homeostasis?

answer choices

a girl running

A dog scratching itself

a girl shivering in the cold rain

someone spitting on the ground

Q.

Which body system controls the body to maintain homeostasis?

answer choices

excretory

nervous

circulatory

skeletal

Q.

Homeostasis

answer choices

allows for a wildly fluctuating internal environment

is impossible in vertebrates

is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation

Q.

In this body temperature feedback loop, predict what would happen if cooling mechanisms were NOT activated?

answer choices

The body would not warm up.

The body would not cool down.

Your body would get colder and colder.

Your body would release lots of heat.

Q. Failure to maintain homeostasis could result in:
answer choices
lack of internal balance
eventual death
difficulty carrying on metabolism 
all three
Q. The "cause" for something to happen is the
answer choices
response
effect
stimulus
homeostasis
Q. The "effect" of a given stimulus is the...
answer choices
response
stimulus
cause
result
Q. The name for a chemical made by glands that tell cells to make something or respond in some way.
answer choices
acid
enzyme
perspiration
hormone
Q. The survival of cells depends on maintaining homeostasis. What will happen to a cell if homeostasis is not maintained?
  
answer choices
The cell will immediately divide.
Cell processes will continue unchanged.
The cell will eliminate wastes more efficiently.
Many chemical reactions in the cell will slow down or even stop.
Q. Even when it is cold outside, the human body maintains an internal temperature of 37 degrees C. Which term describes the maintenance of a stable internal temperature?
answer choices
endocytosis 
homeostasis 
mitosis 
photosynthesis
Q. Homeostasis is necessary for a cell to survive. What is the definition of homeostasis?
answer choices
the eleimination of wastes
the division of cells to form new cells
the maintenance of a stable internal environment
the process by which energy from the sun is used to make food
Q.

Which response is not due to homeostasis?

answer choices

enlargement of iris

increase in glucose production when blood glucose level is low

increase in permeability of collecting duct of kidney tubules

shivering in cold weather

Q.

Which of the following is not regulated by homeostasis?

answer choices

body temperature

blood sugar

blood pH

body movements

Q.

If the environment gets cold, we will often shiver in order to:

answer choices

keep body temperature the same as the external temperature

decrease body temperature

increase body temperature

regulate blood pressure

Q. organ of the endocrine system that secretes hormones.
answer choices
heart
gland
brain
skin
Q.

The group of organisms that use the process of homeostasis includes

answer choices

mammals, only

animals, only

plants and animals

all living things

Q. what is the function of integumentary system to control body temperature high?
answer choices
arterioles in the epidermis dilate so that more blood flow to the skin
produce hormones to reduce the metabolic rate
sweat glands in the skin produce more sweat and hair erector mucles relax to let the hair lie down
detect the temperature and send to nerve impulses to the brain

Review

  • Homeostasis is the tendancy of an organism to regulate its internal condition to maintain good health.

  • Different organisms maintain homeostasis in different ways, but it is a requirement fro survival.

Q.

This takes the messages from the sensors and is known as the control center

answer choices

Brain

Kidney

Liver

Heart

Q.

These detect changes in the environment

answer choices

Control Center

Sensors

Communication System

Target

Q. Organisms must be able to adapt to a changing external and internal environment.  An organism's ability to maintain a stable internal environment is known as homeostasis.  How does a cell's membrane help an organism maintain homeostasis?
answer choices
Cell membranes directly control the temperature of the cell.
Cell membranes control the substances that enter or leave cells.
Cell membranes use a large portion of the cell's energy supply.
Cell membranes protect the cell organelles from large doses of radiation.
Q. Homeostasis is the regulation of metabolic processes within an organism in order to maintain the stable internal conditions required for life.
The human respiratory system includes the nose, the larynx, and the lungs.  This body system helps maintain homeostasis by
answer choices
enabling gas exchange in the body.
transporting oxygen to other organ systems.
removing solid waste from the body.
regulating hormone levels in the body.
Q. Cells can function
answer choices
at any temperature and pH.
only in a narrow range of temperature and pH.
in rapidly changing temperatures and pHs.
in a wide range of pHs and temperatures.
Q. What is the evaporation of a liquid to cool the body?
answer choices
Shivering
Sweating
Vasodilation
Vasoconstriction
Q. If the environment gets cold, we will often shiver in order to:
answer choices
keep body temperature the same as the external temperature
decrease body temperature
increase body temperature
regulate blood pressure
Q.

True or false: if you are unable to maintain homeostasis you might get sick

answer choices

True

False

Q.

When you exercise you produce a lot of extra carbon dioxide. This increases your breathing rate to get rid of the excess. Is this an example of homeostasis?

answer choices

Yes

No

Q.

True or false: when it's hot outside your body temperature also goes up.

answer choices

True

False

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