Unit 1b: Homeostasis and the Fight or Flight Response Assessment

make sure settings have the term as the answer

homeostasis

the tendancy of an organism or cell to regulate its internal enviorment and maintain equilibrium

feedback mechanisms

HOW is the internal enviorment regulated?

communication, homeostatic control

to maintain homeostasis, ___________ within the body is essential. This is called _______________ system.

stimulus

produces a change in variable

receptor

detects a change from stimulus

input

information is sent along a pathway to a control center

control center

integrates/interprets the information

output

information sent along a pathway to an effector

negative feedback

the ouput or response directly reduces/counteracts the orginal simulus to bring it back to a set point

negative

Thermoregulation is an example of __________ feedback

blood vesels dialate and your body sweats

what happens when your body temperature is too high?

blood vesels constrict and your muscles shiver

what happens when your body temperature is too low?

antagonistic hormones

hormones that oppose each other’s actions

insulin and glucagon

examples of antagonistic hormones

lowers, high

insulin ______ blood glucose levels when your blood sugar is too _____

increases, low

glucagon ______ blood glucose levels when your blood sugar is too ______

negative feedback loops

antagonistic hormones are an example of two __________________ working together

the ouput or response directly strengthens/amplifies the orginal simulus to drive it further away from its initial state

positive

child birth is an example of __________ feedback

oxytocin

what hormone is released to intensifiy and speed up contractions dyring child birth?

in fight or flight

when does your body deliberatly shift away from homeostasis?

sympathetic

the innate/automatic fight or flight response is caused by what part of your nervous system?

adrenaline

short term stress responses are caused by _________

messangers

hormones are known as chemical __________

heart rate increases, blood pressure increases, blood sugar increases, breathing rate increases, intestinal muscles relax, pupils dilate, blood flow to skeletal muscles increases.

list the responses your body has to the stress hormones released during fight or flight.

cortisol

long term stress responses are caused by __________

increase blood sugar, hieghtened memory and attention, increase in blood pressure, decrease sensitivity to pain, decreased serotonin, supress the immune system

list the responses your body has to the cortisol released during periods of long term stress.

adrenal glands

what sends out adrenaline(epinephrine) throughout your body during fight or flight?

liver

what body part takes its glucagon and turns it into glucose to send into the blood stream for energy?

slows down, no need to digest

what happens to your digestive system during fight ot flight? Why does this happen?

pump blood to muscles/ systems needed for the situation

why does your body increase heart rate and blood pressure during fight or flight?

to increase flow of oxygen for cellular respiration and to excrete carbon dioxide

why do the lungs increase breathing rate during fight or flight?

parasympathetic

once the immeadiate threat takes over, what part of your nervous system takes over to calm you down?

rest and digest

what’s the phrase commonly associated with the parasympathetic nervous system?

FALSE

true or false: fight or flight is an example of a negative feedback response