Homeostasis

Homeostasis

• allows for a wildly fluctuating internal environment

• is impossible in vertebrates

• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation

Which correctly identifies all steps involved in negative feedback?

• initiation event, stimulus, positive feedback, response, effector, control center, receptor

• termination event, stimulus, reply, effector, control center, and receptor

• initiation event, response, stimulus, effector, command center

• initiation event, stimulus, receptor, control center, effector and response

Which of the following is an example of positive feedback?

• Thermoregulation

• Blood Pressure

• Childbirth

• Blood Sugar Levels

What causes blood glucose levels to rise?

• eating

• vigorous exercise

• sleeping

• going to the toilet

Which of the following is a hormone used to control glucose concentrations in the blood?

• insulin

• glycogen

• pancreas

• adrenaline

Excess glucose in the bloodstream is converted to which other substance when stored in the liver and muscle cells?

• glygogen

• glucagon

• glycerin

• glycerol

Where is insulin produced?

• alpha cells
• beta cells

where is glucagon produced?

• alpha cells
• beta cells

According to the feedback loop, what does high blood sugar promote?

• Insulin Release

• Glucagon Release

• Insulin Uptake

• Glycogen Uptake

Blood sugar regulation is an example of:

• negative feedback

• positive feedback

• neither