portage learning biod 102 biology ii module 4 exam
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Portage Learning / BIOD 102 Biology II Module 4 Exam
Module 4 Exam- Requires Respondus LockDown Browser
Due No due date Points 100 Questions 38 Time Limit 120 Minutes
Requires Respondus LockDown Browser
Attempt History
Attempt Time Score
LATEST Attempt 1 84 minutes 94.5 out of 100
.
Question 1 pts
Multiple Choice:
What is a consequence of blood calcium levels being dangerously
elevated?
uncontrolled muscle contraction
Co
orrrec
c t! crystallization in body tissues
vomiting
high blood pressure
Question 2 pts
Match each term with its appropriate role in the calcium homeostatic
pathway.
1/18
,Portage Learning / BIOD 102 Biology II Module 4 Exam
Co
orrrec
c t! setpoint
10 mg/mL
Co
orrrec
c t! stimulus
decrease in blood calcium
Co
orrrec
c t! sensor
calcium sensing receptor
Co
orrrec
c t! response
PTH increases absorptio
Question 3 pts
(short answer) Describe the mechanisms of calcitonin and how blood
calcium is increased:
Your Answer:
Calcitonin is a pepetide hormone that is released by parafollicular cells of
the thyroid when the blood calcium levels are detected to be too high.
After it is released it binds to receptors of the bone to inhibit osteoclasst
acticvity and binds to kidney tubule receptor to increase calcium excretion.
Calcitonin limits the absorption of calcium from the tubules of the kidney.
Calcitonin is released, and it binds to osteoclasts to prevent
breakdown. Second, it binds to renal tubes to increase the
excretion of calcium.
Islets of Langerhans are composed of which cell types? (select all that
apply)
acinar
gamma
Co
orrrec
c t! alpha
Co
orrrec
c t! beta
Question 6 pts
True or False. Insulin is the main source of energy for almost all body
tissues.
True
3/18
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