Exam 40: Animal Hormones

Which is the correct sequence of components leading up to and following secretion of thyrotropin-releasing hormone (TRH), thyroid-stimulating hormone (TSH), and other hormones by the thyroid gland?

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 ocean is analogous to

Steroid hormones

Which statement about calcium regulation is true?

Rising levels of a released hormone may inhibit its further release from the cells that secreted it.This is an example of a hormone having _______ function in a _______ feedback system.

The hormone prolactin is found in different species, where it can have different functions.It is required for osmoregulation in freshwater fish, stimulates nesting in certain birds, and stimulates milk production in female mammals.In developing a hypothesis for how this occurred, the most reasonable assumption to make would be that

If a person had a tumor that caused oversecretion of the posterior pituitary hormones, which hormone would you expect to see at elevated levels?

Which statement about sex steroids is true?

The invertebrate hormone prothoracicotropic hormone (PTTH)

In the disease diabetes mellitus, a lack of insulin prevents

Which statement about paracrines is false?

Development of a mammalian embryo into a phenotypic female requires

Under what conditions would the bloodsucking bug Rhodnius molt into an adult?

Overproduction or underproduction of _______ in children can cause gigantism or dwarfism.

Insufficient levels of which hormone result in too much glucose in the blood?

Which hormone is an androgen?

It is least likely that _______ is/are involved in molting in arthropods.

Which hormone produced by the anterior pituitary does not control the activities of other endocrine glands?

Vitamin D is

Refer to the figure showing moth metamorphosis. If you experimentally block prothoracicotropic hormone (PTTH) in the fifth-instar larva, and then inject the larva with hormones, what hormone(s) would be both necessary and sufficient to trigger the larva to pupate?