Free Printable HAP1.3 Homeostasis and Feedback

Worksheets

HAP1.3 Homeostasis and Feedback

Total questions: 22

Worksheet time: 30mins

Name

Class

Date

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

positive and negative

receptor and effector

static and dynamic

minor and major

The term for maintaining internal temperature is:

Thermoregulation

Thermometer

Homeothermal

Homeostasis

Rapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.

Positive Feedback Response

Negative Feedback Loop

If the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.

Positive Feedback Response

Negative Feedback Loop

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.

Positive Feedback Response

Negative Feedback Loop

Homeostasis

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

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

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.

Positive Feedback Response

Negative Feedback Loop

These two body systems regulate most feedback mechanisms.

Skeletal & Muscular

Skeletal & Endocrine

Muscular & Nervous

Endocrine & Nervous

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

keep body temperature the same as the external temperature

decrease body temperature

increase body temperature

regulate blood pressure

10.

The "cause" for something to happen is the

response

effect

stimulus

homeostasis

11.

The "effect" of a given stimulus is the...

response

stimulus

cause

result

12.

Failure to maintain homeostasis could result in:

lack of internal balance

eventual death

difficulty carrying on metabolism

all three

13.

Negative Feedback Loops:

amplify processes

prevent small changes from getting larger

are initiated during childbirth

are found only in plants

14.

What is the result of a negative feedback mechanism?

The initial signal is amplified.

The initial signal is canceled out.

15.

As you get dehydrated, your blood becomes thicker and harder to pump. Your kidneys will respond by stopping urine production, sending the water from urine into your bloodstream to thin your blood back to normal level.

Positive Feedback Response

Negative Feedback Loop

16.

Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.

positive feedback mechanisms

a narrow range of healthy values

a wide range of healthy values

no regulation

17.

Detects change and sends a message to the control center

receptor

control center

effector

regulation

18.

Receives the message from the receptor and coordinates a response

control center

effector

glucagon

homeostasis

19.

The organ/cells that carry out the response

control center

receptor

thermoregulation

effector

20.

The process of childbirth is an example of:

negative feedback loop

positive feedback loop

21.

When training a dog, you might reward the dog for obeying your command. This increases the likelihood that the dog will again obey that command in the future. This is similar to a

positive feedback loop

negative feedback loop

22.

Temperature inside climate-controlled buildings is regulated by HVAC systems. When the temperature drops below a set point, the heater begins to run. When the temperature rises to the set point, the heater turns off. This is an example of a

negative feedback loop

positive feedback loop

100 %

HAP1.3 Homeostasis and Feedback

Total questions: 22

Worksheet time: 30mins

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