Introduction to Homeostasis

Which of the following describes homeostasis?

• keeps variables exactly at the set point

• organism's ability to maintain steady(stable) internal conditions

• acts to keep values outside of a desired range

• operates through positive feedback

Tags

NGSS.HS-LS1-3

Negative feedback loops ...

• are one way an organism can maintain homeostasis.

• are rarely found in healthy individuals

• respond by making deviations from normal even larger

• cannot be counteracted with medicine

Tags

NGSS.HS-LS1-3

Which correctly identifies all steps involved in negative feedback?

• initiation event, stimulus, positive feedback, response, effector, control center, receptor

• termination event, stimulus, reply, effector, control center, and receptor

• initiation event, response, stimulus, effector, command center

• initiation event, stimulus, receptor, control center, effector and response

Tags

NGSS.HS-LS1-3

What part of the negative feedback loop is what happens inside of the organism, as the result of the effector?

• Initiation event

• Response

• Receptor

• Effector

Tags

NGSS.HS-LS1-3

This part of the negative feedback loop causes a change in the environment, a disruption to homeostasis.

• initiation event

• control center

• effector

• receptor

Tags

NGSS.HS-LS1-3

A change inside of the organism caused by the initiation event is the ...

• response

• effector

• control center

• stimulus

Tags

NGSS.MS-LS1-5

Which part of the feedback loop is a body part that makes a change to bring the system back to homeostasis?

• Effector

• control center

• response

• receptor

Tags

NGSS.HS-LS1-3

What detects that the system is outside of homeostasis and adjustments need to be made?

• effector

• response

• control center

• stimulus

Tags

NGSS.HS-LS1-3

The body part that senses the change inside the organism ...

• receptor

• control center

• effector

• response

Identify the initiation event.

Scenario: A person begins to exercise which causes their body temperature to increase. The temperature change is noticed and the person begins to sweat and their body temperature decreases.

• temperature change is noticed

• person begins to sweat

• body temperature decreases

• person begins to exercise