Homeostasis

Question 1

Name the three homeostatic control mechanisms and their role

Answer 1

1) Sensory receptor/monitor —> monitors body’s internal conditions (temp,blood, blood sugar, blood pressure, PH levels)

2) coordinating centre—> receives messages from the monitor and sends messages to the regulators

3)Regulator (or effector) causes the change in internal condition

Question 2

body systems are mainted within very ______ limits

Answer 2

narrow

Question 3

what is homeostasis often referred to as

Answer 3

dynamic equilibrium

Question 4

What is the Negative feedback loop

Answer 4

process by which a mechanism is activated to restore conditions to their original or acceptable range

prevents small changes from becoming to large

Question 5

examples of regulating body temperature, explain

Answer 5

1) sensory receptors detect rise in internal temp
2) message is sent to coordinating centre
3)coordinating centre sends messages to regulators
4)Regulator responds (ex blood vessels dialate, or sweat)
5) once temp returns to normal, the response of regulator stops

Question 6

positive feedback loop

Answer 6

process by which a a small effect is amplified; moving the controlled variable even further away from a steady state (less common in the body)

Question 7

example of Positive feedback loop

Answer 7

1)Head pushes against cervix
2)Nerve impulses from cervix’s are transmitted to brain
3)Brain stimulates pituitary glands to separate oxytocin
4)oxytocin carried through bloodstream in uterus
5)oxytocin stimulates uterin contraction and pushes fetus towards cervix

Question 8

define homeostasis

Answer 8

process by which a constant internal environment is maintained despite changes in the external environment

Question 9

What would happen if we didnt have homeostais?

Answer 9

solve after the break