When it is cold outside, you start to shiver because your body temperature drops. Shivering increases the body temperature returning it to normal. Shivering is an example of a
negative feedback loop
positive feedback loop
osmosis loop
heat transfer loop
Which is an example of a positive feedback loop?
cells replicating
sweating
shivering
blood clotting
Put the steps of a negative feedback loop in order
a change is detected by a receptor
a message is sent to the brain
the brain sends a message to an effector (tissue/gland)
tissue or gland responds by releasing a hormone or sweat
body slowly returns to normal
Which of the following is the best example of homeostasis in the human body?
The secretions from oil glands in the skin decrease as a person ages.
Opposite muscles are used to bend and extend a person’s arm at the elbow joint.
The villi of the small intestine increases the absorption of nutrients from the small intestine into the blood.
More growth hormone is released from the pituitary gland when the level of growth hormone in the blood falls too low.
In which of the following ways does perspiring (sweating) help the body to maintain homeostasis?
by decreasing body temperature
by increasing blood sugar levels
by increasin the amount of fluid in the body
by reducing the amount of carbon dioxide in cells
When you excerise, you breathing and heart rate increases because your muscles need more oxygen. Your breathing returns to normal when you stop excerising. Is this an example of homeostasis?