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Verizon [17]
3 years ago
10

Blood calcium is regulated by a hormonal control system. normal blood calcium levels are 8.5 to 11 mg/dl. when calcium levels ar

e too high, the thyroid detects this and releases calcitonin. calcitonin stimulates the kidneys to release more calcium and it causes bones to absorb more calcium and build more matrix. identify the elements of this control system by matching the items below. some answers will not be used and some may be used more than once.
Biology
1 answer:
sattari [20]3 years ago
4 0
FEEDBACK MECHANISM is a regulatory mechanism in which presence of certain level of substance promotes or inhibits its further formation.
The regulation of secretion of Thyrocalcitonin from thyroid gland is an example of such feedback control mechanism. It occurs in two ways:

a) When calcium levels are too high, the thyroid detects this and releases calcitonin. calcitonin stimulates the kidneys to release more calcium and it causes bones to absorb more calcium and build more matrix. This is called Negative Feedback Control.

b) In response to a decrease in calcium levels, parathyroid hormone is released, which causes the release of calcium from bone and retention of calcium in the body, and the calcium level rises back to normal. This is called Positive Feedback Control.
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A biology student caught and tagged 50 trout in a small lake. After two weeks, the student caught another 40 trout and found tha
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The best estimate of the population of trout in the lake is 500 individuals.

The low number of tagged trout recaptured may be because the tags slipped off.

This possibility can be reduced if the student used tags that does not slip off easily.

<h3>Mark and recapture method</h3>

The formula for calculating the estimated number of individuals in the population is given as:

  • N = (M*C) / R

where:

  • N = estimated Number of individuals in the population
  • M = number of individuals captured and Marked
  • C = total number Captured the second time (with and without a mark)
  • R= number of individuals Recaptured (those with a mark)

Calculating the estimate trout population:

N = (50*40)/4

N = 50

Therefore, the best estimate of the population of trout in the lake is 500 individuals.

The low number of tagged trout recaptured may be because the tags slipped off.

This possibility can be reduced if the student used tags that does not slip off easily.

Learn more about mark and recapture method at: brainly.com/question/10646744

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Which below Participate in muscular movement?
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I think its the first one

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4 years ago
The sympathetic chain contains a group of cell bodies called the sympathetic chain Blank 1. Fill in the blank, read surrounding
lions [1.4K]

Answer:

The sympathetic chain contains a group of cell bodies called the sympathetic chain GANGLIA. This structure contains a second cell body for the sympathetic nervous system, the first in the series being found in the THORACOLUMBAR REGIONS' lateral horn of spinal segments T1-L2. The purpose of the VENTRAL AND DORSAL rami is to carry visceral motor and visceral sensory neurons to and from this sympathetic chain.

Explanation:

The sympathetic trunks (sympathetic chain, gangliated cord) are a paired bundle of nerve fibers that run from the base of the skull to the coccyx.

See the picture attached.

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3 years ago
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