Homeostasis part 1 (Feedback Loops, Symbiosis, Keystone Spp)

What is the point of a feedback loop?

• To provide the body with more energy

• To provide the body with more food

• To make sure the conditions in the body are always changing

• To make sure the conditions in the body remain stable

A feedback loop best fits which characteristic of life?

• Cells

• Organization

• Homeostasis

• Adaptation

Failure to maintain homeostasis could result in:

• lack of internal balance
• eventual death
• difficulty carrying on metabolism 
• all three

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

The process of childbirth is an example of:

• negative feedback loop
• positive feedback loop

Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.

• positive feedback mechanisms
• set points
• a wide internal range
• no regulation

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

The "effect" of a given stimulus is the...

• response
• stimulus
• cause
• result

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

• Positive Feedback Response
• Negative Feedback Loop