Homeostasis

Homeostasis:

• allows for a wildly fluctuating internal environment

• is impossible in human's body

• is the maintenance of a relatively stable internal environment

• is the maintenance of a relatively stable external environment

Homeostasis in the human body is often maintained by the: 

• brain only

• positive feedback loop

• muscles

• negative feedback loop

With low oxygen levels, your breathing rate will increase. When your oxygen levels rise, what is the appropriate response?

• Stop breathing

• Increase heart rate

• Keep breathing rate high

• Return breathing rate to baseline

When your glucose level is too high, what is the appropriate response?

• Urinate

• Release glucagon

• Eat sugar

• Release insulin

The cardiovascular system is responsible for which of the following?

• Maintaining proper blood volume, ion and salt concentrations in the body

• Playing an important role in the immune system and fighting off invading microbes, infections and toxins

• Transporting homeostasis-regulating hormones, nutrients and oxygen

• Secreting hormones into the blood stream

Which of the following is NOT a stimulus?

• Light

• Temperature

• Pain

• Time

Which component of the homeostatic system detects change?

• Effector

• Control Center

• Stimulus

• Receptor

Which of the following is an example of an effector?

• Pancreas detecting an increase in blood glucose

• Drop in blood oxygen

• Salivary glands increasing their release of saliva

• Regulating blood pressure when you go from laying down to standing

Select all the correct statements about positive feedback.

• Amplifies or magnifies the output

• Works on the same direction of the stimulus

• Reduces the intensity of the stimulus

• Most processes in the body are controlled by positive feedback

What is the physiology?

• It is the study of normal function within living organisms

• The study of the structure of body systems

• The abnormal function of body organs

• The study of the disturbance of normal body structures