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:
D. The digestive system breaks food down into the molecules that can be used in respiration.
Explanation:
Answer:
A ribosome is a complex molecular machine found inside the living cells that produce proteins from amino acids during the process called protein synthesis or translation. The process of protein synthesis is a primary function, which is performed by all living cells. Ribosomes are specialised cell organelles and found in both prokaryotic and eukaryotic cells. Every living cell requires ribosomes for the production of proteins
Explanation:
The appropriate response is Klinefelter. Klinefelter disorder is a chromosomal condition that influences male physical and psychological advancement. Its signs and side effects differ among influenced people. Klinefelter disorder influences 1 in 500 to 1,000 infant guys. Most variations of Klinefelter disorder are substantially rarer, happening in 1 in 50,000 or fewer infants.
