Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. What does that suggest about the diversity of molluscs in this area?

TLS Online TPP Program

#Question id: 20278

#Unit 7. System Physiology – Animal

What type of protein is human growth hormone?

TLS Online TPP Program

#Question id: 20279

#Unit 7. System Physiology – Animal

Which one of the following statements is true with regard to Growth Hormone Secretion?

a. Growth hormone is secreted in a pulsatile pattern.

b. Growth hormone secretory rates are constant over a lifetime.

c. After puberty, the rate of growth hormone secretion declines to a stable level.

d. The highest rates of growth hormone secretion occur during puberty, and the lowest rates occur in senescence.

Which of the following is the correct combination of the statements given above?

TLS Online TPP Program

#Question id: 20280

#Unit 7. System Physiology – Animal

What stimulates growth hormone release?

TLS Online TPP Program

#Question id: 20281

#Unit 7. System Physiology – Animal

The overproduction of growth hormone in adults leads to

TLS Online TPP Program

#Question id: 20282

#Unit 7. System Physiology – Animal

Growth hormone secretion is regulated by negative feedback, three feedback loops including both long and short loops are involved,

a.  GHRH inhibits its own secretion from the hypothalamus via an ultrashort-loop feedback.

b. Somatomedins, which are by-products of the growth hormone action on target tissues, inhibit secretion of growth hormone by the anterior pituitary.

c. Both growth hormone and somatomedins stimulate the secretion of somatostatin by the hypothalamus.

d. SRIF is also secreted by the hypothalmus and acts on the somatotrophs to stimulate growth hormone secretion.

Which one of the following represents all correct statements?

TLS Online TPP Program

#Question id: 20283

#Unit 7. System Physiology – Animal

The following statements regarding to the pancreas and its function.

a. The pancreas is composed of two major types of tissues, (1) the acini, which secrete digestive juices into the duodenum, and (2) the islets of Langerhans, which secrete insulin and glucagon directly into the blood.

b. The islets contain three major types of cells, alpha, beta, and delta cells

c. The beta cells, constituting about 25 percent of all the cells of the islets, lie mainly in the middle of each islet and secrete insulin and amylin.

d. The alpha cells, about 60 percent of the total, secrete glucagon and the delta cells, about 10 percent of the total, secrete somatostatin.