Ch 17 Endocrine System & Gland A&PII – Flashcards

Glucagon works by:

T/F: Increasing levels of cortisol inhibit the release of corticotropin-releasing hormone (CRH).

Thyroid hormone synthesis involves secretion of a glycoprotein called ___________ by the follicular cells.

Reduced hormone concentration in the blood often causes target cells to:

Down-regulation refers to the process when a cell decreases the number of receptors it has for a hormone. This will occur with

When a chemical messenger helps initiate an inflammatory response by causing cellular changes in neighboring cells, it is demonstrating ___________ signaling.

Parathyroid hormone release depends on blood levels of calcium. Such an endocrine reflex is said to be initiated by a. humoral stimulation. b. positive feedback stimulation. c. hormonal stimulation. d. neural stimulation.

Steroids, peptides, and nucleic acids are the three classes of hormones. True False

Generally, the shorter the half-life of a hormone 1. the more frequently it must be replaced. 2. the less frequently it must be replaced.

When the effects of water-soluble hormones on their target cells are considered, the hormone itself is a. the hormone-response element. b. the second messenger. c. the G protein. d. the first messenger. e. the phospholipase.

Within the infundibulum, the axons from neurons extending into the posterior pituitary are known as the a. secondary plexus. b. primary plexus. c. hypothalamo-hypophyseal tract. d. supraoptic portal system.

Thyroid hormone's effects are to a. increase metabolic rate and body temperature by increasing protein synthesis in target cells. b. decrease metabolic rate and body temperature by increasing protein synthesis in target cells. c. increase metabolic rate and body temperature by turning off the G protein, cAMP cascade. d. increase metabolic rate and body temperature by turning on the G protein, cAMP cascade. e.decrease metabolic rate and body temperature by turning on the G protein, cAMP cascade.

In response to high blood glucose, the pancreas releases insulin to enable glucose to enter body cells. When the blood glucose level returns to normal, insulin release stops. This is an example of regulation by endocrine dysplasia. positive feedback. negative feedback. neural regulation. somatic regulation.

When a chemical messenger helps initiate an inflammatory response by causing cellular changes in neighboring cells, it is demonstrating ___________ signaling. paracrine allomone autocrine pheromone

Parathyroid hormone functions to raise blood calcium levels. True False