Exam 40: Animal Hormones

Refer to the figure showing moth metamorphosis. If the corpora allata are removed from the larva at the fourth-instar stage, the organism will go through another molt to become a(n) _______.

Patients with thyroid cancer often have the entire thyroid gland removed.What conditions can these patients develop if they don't receive hormone replacement therapy?

Prior to the introduction of iodized table salt, it was more common to see people with goiters.If using iodized salt causes a person's goiter to disappear, what can you say about that person's condition?

Somatostatin

Which statement about hormonal responses is false?

Glucagon increases

Thyrotropin-releasing hormone (TRH), which is secreted by the hypothalamus, causes the anterior pituitary to produce thyroid-stimulating hormone (TSH).TSH, in turn, leads the thyroid to produce thyroxine, and thyroxine eventually causes reduced TRH secretion.This chain of events is an example of _______ feedback.

A hormone that helps to reduce inflammation and allergic reactions is _______.

The target tissues of hormones are those tissues that

Rhodnius is an arthropod that can be decapitated and live for up to a year without its head.Prothoracicotropic hormone (PTTH) is a molting hormone that is stored in the head and released after a blood meal.Because of this you would expect that a Rhodnius that is decapitated within an hour of its last blood meal would

If the endocrine system is likened to a television broadcasting system and hormones are the signal being broadcast, then your television would represent the _______ in the system.

Pituitary peptide hormones that affect other endocrine glands are called _______ hormones.

One might hypothesize that northern Native peoples, such as the Inuit, who live where sunlight is relatively limited, would suffer from increased incidences of _______ deficiency, and consequently _______.However, evidence indicates these populations have compensated for this potential deficiency by developing more sensitive receptors.

Which statement about hypothyroid goiters is true?

Which hormones change blood levels of calcium?

Protein hormones do not cross the cell membrane, but _______ hormones do.

If you were testing newly identified compounds for the possibility that they serve as hormones, which types of molecule would be least likely to show hormonal activity on the target cells you are testing?

Hormonal and other systems in which production is shut off when the product becomes abundant are known as _______ feedback systems.

Which statement about the thyroid gland is true?

A castaway on a deserted island puts a message in a bottle and throws it into the ocean, hoping it will wash up on some inhabited shore and bring help.In endocrine signaling, the castaway is analogous to a(n)