Topic 3.1 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

Which correctly identifies all steps involved in negative feedback?

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

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

• response, stimulus, effector, command center

• stimulus, receptor, control center, effector and response

When a change in the environment occurs it is called the ...

• response

• effector

• control center

• stimulus

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

• receptor

• control center

• effector

• response

Tags

NGSS.MS-LS1-8

Identify the stimulus.

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 increases

• person begins to exercise

Identify the response that restores homeostasis.

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

• temperature changes is noticed

• a person begins to exercise

• body temperature increases

• body temperature decreases

Which part of the feedback loop and body is responsible for sensing the temperature change?

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

• control center - sweat glands

• receptor - sweat

• control center - hypothalamus (part of the brain)

• receptor - brain and skin receptors

Identify the response.

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

• the person begins to sweat

• the person begins to exercise

• change in temperature

• body temperature increases

Tags

NGSS.HS-LS1-3

Which of the following is a disease where sufferers cannot control their blood glucose levels?

• Diabetes

• Influenza

• Cholera

• Cystic fibrosis

You are growing a tomato plant in your house. Which of the following would the plant probably do to help maintain homeostasis?

• Grow away from the light coming from the window

• Grow toward the light coming from the window

• Growth is not affected by the light coming from the window

Tags

NGSS.HS-LS1-3