Calcitonin is a hormone produced by the c cells of the Thyroid gland.
<u>Explanation:</u>
- The c cells present in the thyroid are otherwise called Parafollicular cells. The primary function of c cells is to secrete Calcitonin (a protein hormone) which has a minor role in calcium regulation.
- Calcitonin decreases the parathyroid hormone (PTH), by lowering blood calcium level by suppressing osteoclast activity of bones and increases of calcium Which is excreted along with the urine.
- The C cells are found next to the Thyroid follicles and present in the connective tissue.
 
        
             
        
        
        
Answer:
C.
Explanation:
It affects the rate of weathering.
 
        
             
        
        
        
Answer:
The chromosomes are arranged in their respective homologous  pairs. In humans, this displays 22 pairs of autosomes  and 1 pair of sex chromosome.
Explanation:
Chromosomes that are similar in their size and shape and also display similar genetic traits and carry the same genetic information are paired together. These are known as homologous chromosomes. These chromosomes carry different variations of similar genes in them. In humans there are 46 chromosomes in total. These chromosomes are paired and form 23 homologous pairs. Among these 23 homologous pairs, 22 pairs are autosomes and one pair are the sex chromosomes which are either (XX or XY). The sex chromosomes determine the sex of an individual. XX chromosomes represent a female and XY chromosomes represent a male.
Learn more about autosomes here:
brainly.com/question/19426394
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