Suzanne’s blood test indicates a condition called hyperparathyroidism, which means her parathyroid gland is producing an excess of parathyroid hormone
(PTH). The doctor explained how this condition relates to Suzanne’s broken hip
and osteoporosis.
“Calcium is necessary for many functions in the body, one being hardening
of bone tissues which also serve as the body’s storehouse of that mineral.
Calcium is also important in cardiac function and signaling within the nervous
system. The primary hormone utilized to regulate the levels of calcium
circulating in our blood is parathyroid hormone, also called PTH. There is a
group of small glands, called the parathyroid glands, on the back side of the
thyroid gland in your throat. The parathyroid gland senses calcium levels and
adjusts its secretion rate of PTH. PTH indirectly stimulates osteoclasts, the
bone pruners, in order to increase blood calcium

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )