The hormone calcitonin, which is produced by the parafollicular or C cells of the thyroid, has the opposite effect on blood calcium levels as does PTH. I hope this helps! : )
Answer:
The correct option is lamprey.
Explanation:
Lamprey is a kind of fish which lack jaws. They lack a true skeleton, but the cartilage is present in them. Due to lack of proper backbone, they look similar to snails. The lamprey reproduces by laying eggs in the water. Larvae tend to develop from these eggs. The lamprey releases its eggs only in freshwater. Only the mature lamprey live in the sea to act as a parasite and take food. For laying eggs, it travels to freshwater.
I believe you’re referring to the body’s fight or flight response.
Answer:
The answer is B
Explanation:
The definition of a light year is the unit of astronomical distance, though it is called a light year it is actually a measurement of distance, so the answer, "the time it takes light to travel 1 million km is the correct answer.
