Homeostasis Basics
What is the main goal of homeostasis?
A. To speed up body processes
B. To keep internal conditions stable
C. To eliminate all changes
D. To respond only to the environment
B. To keep internal conditions stable
Which situation best represents negative feedback?
A. Blood clotting by adding more platelets after a cut
B. Contractions increasing during labor
C. Sweating when body temperature rises
D. More enzymes being released continuously
C. Sweating when body temperature rises
During exercise, breathing rate increases mainly to maintain:
A. Blood pressure
B. Oxygen levels
C. Body height
D. Digestion rate
B. Oxygen levels
If blood sugar levels drop, what is the stimulus?
A. Eating food
B. Low blood sugar
C. Insulin release
D. Digestion
B. Low blood sugar
Which of the following is regulated by homeostasis in humans?
A. Hair color
B. Blood Sugar
C. Finger length
D. Eye color
B. Blood Sugar
What is the main function of a negative feedback loop? A. Increase change
B. Stop all responses
C. Reverse a change
D. Speed up growth
C. Reverse a change
You feel thirsty after not drinking water for several hours. This helps regulate:
A. Body temperature
B. Oxygen levels
C. Water balance
D. Muscle strength
C. Water balance
If blood sugar levels raise, what is the response?
A. Eating food
B. Low blood sugar
C. Insulin release
D. Digestion
C. Insulin release
Which of the following is NOT regulated by homeostasis in humans?
A. Hair color
B. Heart rate
C. Hunger
D. Blood Sugar
A. Hair color
Which phrase best describes positive feedback?
A. Reduces change
B. Maintains balance
C. Increases a response to achieve a goal
D. Stops a process immediately
C. Increases a response to achieve a goal
If homeostasis is disrupted for too long, it often results in _____ or even death.
Disease
A drop in body temperature will cause the body to respond by having the _______ system start to shiver to generate heat.
Muscular
Homeostasis is primary controlled by feedback and reactions from the Nervous System (sensations) and the _______ System (hormones)
Endocrine
Which example shows positive feedback?
A. Shivering in cold weather
B. Sweating during exercise
C. Blood clot formation
D. Regulating breathing rate
C. Blood clot formation
Someone with chronic High Blood Pressure has trouble maintaining homeostasis of their _________ system
Cardiovascular
Information from from the environment is process by receptors of the __________ system.
Nervous
Homeostasis helps bring the body back to a __________, which is the optimal value or narrow operating range of a variable. Example: Our body temperature is 98.6 degrees
Set Point
Childbirth is an example of ______ feedback because contractions become stronger and more frequent until a goal is achieved.
Positive
Type 1 Diabetes is a disease of the Endocrine system, in which the body has difficulty regulating its blood sugar, due to inability to produce enough of the hormone ______
Insulin
When the brain senses carbon dioxide levels rising in the blood, it will command the respiratory system to increase the _________ rate to return the body to homeostasis.
Breathing