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ASU BIO 181 EXAM 3 NEWEST ACTUAL EXAM QUESTIONS AND DETAILED CORRECT ANSWERS | A+ GRADE 2025
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ASU BIO 181 EXAM 3 NEWEST ACTUAL EXAM QUESTIONS AND DETAILED CORRECT ANSWERS | A+ GRADE 2025
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ASU BIO 181 EXAM 3 NEWEST ACTUALEXAM QUESTIONS AND DETAILED
CORRECT ANSWERS | A+ GRADE 2025
Briefly explain why the action potential flows only from the
axon hillock to the terminal web. Correct Answer The
action potential originates from the axon hillock which
initiates the flow of the action potential because of the
presence of higher density voltage-gated ion channels.
Explain how insulin and glucagon regulate the balance
(i.e, homeostasis) between glycogen and glucose when
epinephrine (i.e., adrenalin) is not involved. Correct
Answer - blood glucose rises
-> b-cells of pancreas release insulin
-> insulin stimulates cells to use glucose and convert
glucose to glycogen and fat
- blood glucose falls
-> pancreas stops releasing insulin
-> cells use glycogen and fat for energy
- blood glucose falls too low
-> a-cells release glucagon
-> glucagon stimulates liver to convert glycogen back to
glucose
The Parasympathetic Nervous System is triggered is
trigger to act by exposure to epinephrine. Correct Answer
False
, Vitamin D causes the parathyroid to inhibit new PTH
synthesis. Correct Answer True
Insulin is a ligand. Correct Answer True
What could the stress of taking an exam do to your
glucose levels in various parts of the body? Correct
Answer The stress could cause the sympathetic nervous
system to kick in and increase glucose into the blood
Vitamin D is really a hormone. Correct Answer True
Vitamin D is synthesized from cholesterol Correct Answer
True
Your mom came back from her medical appointment and
said that the M.D. told her she had low bone density. What
medical problem could this cause and what
hormones/endocrine glands in the body are involved?
Correct Answer Osteoporosis, the parathyroid hormone
released on the thyroid glad has a large role in bone
density. Too much parathyroid hormone causes calcium
loss in the urine at the expense of bone.
Where do fats in the body play a role in balance between
glucose and glycogen? Correct Answer If there is extra
glucose present in a cell the reserve glucose is put in
reserve as glycogen (stored as fat) mainly in the liver and
muscle cells to be used at a later time
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