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:
It is the <em><u>Cell</u></em><em><u> </u></em><em><u>wall</u></em><em><u>.</u></em>
Explanation:
<u>Please use picture as proof.</u>
<em><u>If</u></em><em><u> </u></em><em><u>you</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>happy</u></em><em><u> </u></em><em><u>with</u></em><em><u> </u></em><em><u>my</u></em><em><u> </u></em><em><u>response</u></em><em><u> </u></em><em><u>you</u></em><em><u> </u></em><em><u>can</u></em><em><u> </u></em><em><u>mark</u></em><em><u> </u></em><em><u>me</u></em><em><u> </u></em><em><u>Brainliest</u></em><em><u>!</u></em>
<em><u>Thank</u></em><em><u> </u></em><em><u>you</u></em><em><u>!</u></em>
<em><u>For</u></em><em><u> </u></em><em><u>any</u></em><em><u> </u></em><em><u>sort</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>question</u></em><em><u> </u></em><em><u>you</u></em><em><u> </u></em><em><u>can</u></em><em><u> </u></em><em><u>reach</u></em><em><u> </u></em><em><u>out</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>me</u></em><em><u> </u></em><em><u>over</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>comments</u></em><em><u>.</u></em>
<em><u>(</u></em><em><u>Would</u></em><em><u> </u></em><em><u>appropriate</u></em><em><u> </u></em><em><u>it</u></em><em><u>.</u></em><em><u>)</u></em>
That's at least one of his parents are heterozygous
Answer:
10
Explanation:
Proteins are polymers of amino acids. 20 different amino acids are present in various combinations in different proteins. Humans are incapable of synthesizing some amino acids. These are called the essential amino acids as they must be provided in the diet.
Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are the nine amino acids that are not synthesized in the body of adult humans and therefore, are categorized as essential ones. Arginine is a non-essential amino acid for adult humans but is essential for adult humans. Therefore, for an infant, more than 9 amino acids are essential ones.
