WorksheetsHormones and homeostasis
Total questions: 14
Worksheet time: 22mins
The main difference between positive and negative feedback mechanisms in homeostasis is :
in negative feedback the output counteracts the stimulus
in positive feedback the output counteracts the stimulus
in negative feedback the output increases the stimulus
in positive feedback the output increases the stimulus
An example of negative feedback in the scenarios below is:
oxytocin release during childbirth
oxytocin release during breastfeeding
temperature decrease after sweating
none of the above
Following consumption of two doughnuts, the blood sugar levels increase. Which of the following is the integration centre when sugar levels increase?
hypothalamus
beta cells of the pancreas
alpha cells of the pancreas
pituitary gland
All of the following are involved in response to finding a python taking a nap on your bed unexpectedly
secretion of ACTH from the pituitary gland to the adrenal cortex
retention of sodium by the kidneys
activation of the adrenal medulla to release epinephrine and norepinephrine via the nervous system
activation of the adrenal cortex to release corticoids
increased blood pressure and breathing rate
What are the four ways by which heat can be lost or gained?
Ayaulym, a 17 year old girl presented with general body weakness and body wasting despite feeling very hungry for the past two months. Her test results showed increased fasting blood glucose, glucose in urine, normal blood pressure and no insulin. Which of these indicate that she had diabetes?
The doctor concluded that it was diabetes.
body wasting
excessive hunger
glucose in urine
increased fasting glucose
all of the above
From question 6 which type of diabetes does Ayaulym suffer from? And why?
As a thermoregulatory adaptation dogs pant. This is an example of:
insulation
metabolic heat production
evaporative cooling
circulatory adaptation
The means by which heat is lost or gained when water or air moves over a surface is called:
evaporation
radiation
conduction
convection
Thermoregulatory adaptation in humans is through
negative feedback
positive feedback
no feedback at all
All of the following are responses to increased temperature except:
sweating
vasoconstriction
vasodilation
taking off excess clothes
Cushing's syndrome is a condition whereby there may be a tumor in the adrenal cortex. One of the signs is general body swelling. Which of the following would result in this?
epinephrine and norepinephrine
glucocorticoids such as cortisol
mineralocorticoids such as aldosterone
increased retention of sodium and water by the kidneys
There are two main types of hormones: those derived from amino acids and those derived from cholesterol. Is it true or false that in most cases cholesterol derived hormones take longer to bring about a response?
True
False
What are the main differences between the signaling of steroid-derived and amino acid derived hormones?
amino acid-derived hormones have receptors on the cell membrane
amino acid-derived hormones can bring about a response in the cytoplasm without protein synthesis
steroid hormones have membrane receptors
steroid hormones have receptors inside the cell and always affect protein synthesis
amino acid-derived hormones only have receptors in the nucleus
