Homeostasis

Homeostasis

• allows for a wildly fluctuating internal environment

• is impossible in vertebrates

• the process in which an organism regulates itself to try to maintain stable conditions. It often incorporates a form of feedback regulation.

Tags

NGSS.HS-LS1-3

Which of the following is not regulated by homeostasis?

• body temperature

• blood sugar

• blood pH

• body movements

Tags

NGSS.HS-LS1-3

Which of the following is an example of the human body maintaining homeostasis?

• The heart pumps harder in response to blockage in the arteries.

• The pancreas releases insulin into the blood stream in reaction to higher glucose levels.

• The body shivers in the cold to decrease the body’s internal temperature.

• The thyroid moves calcium from bones to blood when blood calcium levels get too high.

Tags

NGSS.HS-LS1-3

Which of the following is NOT an example of how the human body maintains homeostasis?

• The body shivers in response to high blood pressure to close blood vessels.

• The pancreas releases insulin into the blood stream in reaction to higher glucose levels.

• Skin produces sweat when body temperatures are too high.

• Heart beats speed up if blood pressure is too low.

Tags

NGSS.HS-LS1-3

Which of the following is NOT an example of negative feedback as a tool in homeostasis?

• When blood pressure increases, signals are sent for the heart rate to slow down.

• When the body is hungry, metabolism slows down to conserve energy.

• When oxygen levels are low, a hormone is released to stimulate the production of red blood cells.

• When blood sugar rises, signals are sent to the liver to increase bile production.

Tags

NGSS.HS-LS1-3

Which of the following is a consequence of low vitamin D?

• Lower calcium absorption

• Higher blood pressure

• Higher heart rate

• Lower white blood cell count

Why are astronauts at risk of bone loss?

• Increased exposure to sunlight reduces vitamin D production

• Increased exposure to sunlight increases vitamin D production

• Decreased exposure to sunlight reduces vitamin D production

• Decreased exposure to sunlight increases vitamin D production

Tags

NGSS.HS-LS1-5

What is the pigment that exists in hair, skin, and iris of the eye, that acts as a natural sunscreen?

• Glucose

• Melanin

• UVB

• Vitamin D

Tags

NGSS.MS-LS4-4