Homeostasis

Which is an example of positive feedback?

• Thermoregulation.

• Blood platelets clotting on an open wound.

• Osmoregulation.

• Release of insulin into the blood.

Tags

NGSS.HS-LS1-3

What are the 3 parts of a feedback loop? In the correct order.

• Reaction, Sensor, and Stimulus

• Response, Sensor, and Stimulus.

• Sensor, Stimulus, and Reaction.

• Stimulus, Sensor, and Response.

Which of the following are examples of negative feedback?

• Thermoregulation

• Childbirth

• Osmoregulation

• PH Regulation

Tags

NGSS.HS-LS1-3

What needs to happen for homeostasis to be maintained?

• An organism must have a different internal and external environment.

• An organism must be able to move to a new environment.

• An organism must have a body temp of 98.7 degrees.

• Passage of materials across cell membranes must continue at a constant rate.

Tags

NGSS.HS-LS1-3

An elephant is walking on the hot African plains. As it does so, its body temperature increases. As it walks, it comes across a small pond.

What should this elephant do to BEST maintain homeostasis?

• It should drink the pond water to cool off.

• It should keep searching for shade.

• It should wave it's ears to create a breeze.

• It should jump in the pond to cool off.

Tags

NGSS.MS-LS1-3

Which of the following are correct definitions of homeostasis?

• A variety of external changes to an organism.

• The increase in body temperature when it's cold outside.

• The ability of an organism to maintain a constant internal environment.

• Steady or balanced internal conditions of an organism.

Which of the following is a homeostatic response when the human body is fighting an infection?

• Increased amount of oxygen in the blood.

• Increasing heart rate.

• Increased amount of plasma cells in the blood.

• Increase in body temperature (fever).

Which describes positive feedback?

• An event that enhances the original stimulus.

• A response to increased temperature.

• A nice comment about something you did.

• A loss of output from the body's receptors.

Tags

NGSS.HS-LS1-3

(Review to keep you on your toes)

Which organs make up the respiratory system?

• Brain, spinal cord, axons

• Stomach, liver, intestines

• Lungs, nose, mouth

• Lungs, nose, trachea