Dynamic Exam - Body Balance: In-Depth Exam Prep
And Solutions
Homeostasis Right Ans - body's ability to regulate and maintain a stable
condition inside your body, regardless of changes to the external environment
Conditions in the body that need to be kept constant Right Ans - - body
temperature
- oxygen levels
- carbon dioxide levels
- blood pressure
- pH
How does the body maintain homeostasis? Right Ans - the stimulus
response model
- receptors to detect changes
- need a processing centre to receive this information & coordinate a response
- need effectors to produce a response
Negative feedback loop Right Ans - sends a message to the brain to tell the
effectors to stop once the body returns to its normal condition
e.g once body temp increases message is sent to brain to stop sweating
Example of negative feedback Right Ans - regulating body temperature
glucose level regulation (too low) Right Ans - r - blood detect low glucose &
send message to brain
b - hypothalamus sends message to pancreas/liver
e - pancreas releases less insulin & converts glycogen back to glucose
r - glucose levels return to normal
nf - brain sends message to liver to stop converting
stimulus Right Ans - a change in an organism
e.g body temp exceeds 37c
receptor Right Ans - detects change & lets the brain know that there is a
problem
e.g sensors that end in the skin & brain
, control centre Right Ans - interprets the change/signal
e.g temp regulatory centre in brain
effector Right Ans - an organ, gland or muscle that becomes active in
response
e.g sweat glands throughout body
response Right Ans - a reaction to a change/signal in effector
e.g produces sweat
diabetes Right Ans - type 1 - produce no insulin (hereditary)
type 2 - don't produce enough insulin
positive feedback loop Right Ans - the response increases the original
stimulus (change)
e.g contraction of the uterus continues and increases until birth occurs
role of endocrine system Right Ans - maintain homeostasis via the use of
hormones with a slow response
3 areas the endocrine system regulates Right Ans - - growth and
development
- how your body uses energy
- how you respond to stress
endocrine gland (secretes?) Right Ans - produces and secrets hormones
directly in the bloodstream for transport around the body
hormone & how it travels Right Ans - chemical messengers that are
secreted from glands into the blood and affect cells in another part of the body
how do hormones know which cells are target cells? Right Ans - have
special receptors that recognise the hormones
target cell/organ (how it responds to hormones) Right Ans - only cells that
hormones work on & allows them to influence that cell to respond
And Solutions
Homeostasis Right Ans - body's ability to regulate and maintain a stable
condition inside your body, regardless of changes to the external environment
Conditions in the body that need to be kept constant Right Ans - - body
temperature
- oxygen levels
- carbon dioxide levels
- blood pressure
- pH
How does the body maintain homeostasis? Right Ans - the stimulus
response model
- receptors to detect changes
- need a processing centre to receive this information & coordinate a response
- need effectors to produce a response
Negative feedback loop Right Ans - sends a message to the brain to tell the
effectors to stop once the body returns to its normal condition
e.g once body temp increases message is sent to brain to stop sweating
Example of negative feedback Right Ans - regulating body temperature
glucose level regulation (too low) Right Ans - r - blood detect low glucose &
send message to brain
b - hypothalamus sends message to pancreas/liver
e - pancreas releases less insulin & converts glycogen back to glucose
r - glucose levels return to normal
nf - brain sends message to liver to stop converting
stimulus Right Ans - a change in an organism
e.g body temp exceeds 37c
receptor Right Ans - detects change & lets the brain know that there is a
problem
e.g sensors that end in the skin & brain
, control centre Right Ans - interprets the change/signal
e.g temp regulatory centre in brain
effector Right Ans - an organ, gland or muscle that becomes active in
response
e.g sweat glands throughout body
response Right Ans - a reaction to a change/signal in effector
e.g produces sweat
diabetes Right Ans - type 1 - produce no insulin (hereditary)
type 2 - don't produce enough insulin
positive feedback loop Right Ans - the response increases the original
stimulus (change)
e.g contraction of the uterus continues and increases until birth occurs
role of endocrine system Right Ans - maintain homeostasis via the use of
hormones with a slow response
3 areas the endocrine system regulates Right Ans - - growth and
development
- how your body uses energy
- how you respond to stress
endocrine gland (secretes?) Right Ans - produces and secrets hormones
directly in the bloodstream for transport around the body
hormone & how it travels Right Ans - chemical messengers that are
secreted from glands into the blood and affect cells in another part of the body
how do hormones know which cells are target cells? Right Ans - have
special receptors that recognise the hormones
target cell/organ (how it responds to hormones) Right Ans - only cells that
hormones work on & allows them to influence that cell to respond
