Calcium levels in the body are maintained by hormones. If the blood calcium level rises above a set point, calcitonin is secreted by the thyroid gland and sets into motion responses to lower the blood calcium back to the set point. If the blood calcium level falls below a set point, the parathyroid gland secretes parathyroid hormone that sets into motion responses to raise the blood calcium. These homeostatic responses are examples of:
a. positive feedback
b. effectors
c. sensors
d. negative feedback
Answer:
d. negative feedback
Explanation:
Negative feedback responses are the ones that counteract the change. Any alterations in the internal body conditions such as blood calcium levels are sensed by receptors. The information is sent to the brain which in turn commands the effectors such as endocrine glands to secrete the required hormones to restore the normal conditions. Here, changes in the calcium levels are counteracted by the secretion of calcitonin and parathyroid hormones and the calcium is maintained within a narrow range. This represents negative feedback.
Answer:
to ensure that the two individuals are of the same species
Explanation:
It also involves stereotyped behaviours. Courtship behaviour informs a potential mate that the intention is breeding and not aggression.
Please give brainliest
In this item we are given that the methane emission rate will go high due to the foreseen temperature rise cause by global warming. The biogeochemical cycle that will be affected directly through this is the Carbon cycle.
Methane is a compound comprised of one atom of carbon and four atoms of hydrogen. Carbon cycle involves the process in which the carbon dioxide emitted by the organisms will be absorbed by the producers. The carbon which are to be absorbed by producers should come in the form of carbon dioxide.
1) Some alleles are dominant and some are recessive. Principle of Dominance.
2) Genes passed down from parent to offspring. ...
3) During the production of gametes, two copies of each hereditary factor separate.
4) Genes for different traits can segregate independently during the formation of gametes.
Hope this helps! :)
