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Essential Biology II with Lab |
Questions & Answers | Grade A
100% Correct - Portage Learning
Question:
what happens if calcium is unbalanced
Answer:
If there is an unbalance that is too low, skeletal and cardiac muscle will
experience uncontrolled contractions that can be fatal. if levels are too high
calcium phosphate can crystallize in body tissues. (The set point for blood
calcium concentration is 10 mg/mL)
Question:
The parathyroid glands are four tiny structures nestled within the posterior
(back) surface of the thyroid gland. These glands are equipped with ____ that
monitor and detect changes in calcium levels in the blood. In the case of low
levels of calcium, the glands will respond by releasing ______
Answer:
specialized calcium-sensing receptors (CaSRs) ; parathyroid hormone (PTH).
,Question:
PTH is a peptide hormone that has both direct and indirect effects on body
tissues. name direct types
Answer:
Directly, PTH binds to receptors of bone and kidney tissue to release calcium
ions into the bloodstream and to increase the reabsorption of calcium
Question:
PTH is a peptide hormone that has both direct and indirect effects on body
tissues. name indirect types
Answer:
Indirectly, PTH stimulates the production of vitamin D to increase calcium
absorption
Question:
A negative feedback loop maintains calcium levels; as the levels increase,
______________
Answer:
the CaSRs stops releasing PTH
, Question:
the exchange of heat between two objects that are in direct contact with each
other is an example of which of the followng?
Answer:
conduction
Question:
nephrons are organized into a system of ___________, collecting ducts, and
capillaries
Answer:
tubules
Question:
which of the following is considered a peptide hormone synthesized and
stored within specialized cells of the pancreas?
Answer:
insulin