Question

You are assessing a patient who presented with intersex genitalia. You find that this individual is genetically male (has one X chromosome and one Y chromosome) and possesses the testis-determining factor (called the SRY gene). Further, they are producing adequate levels of gonadotropin-releasing hormone, follicle-stimulating hormone, and testosterone. What is the most likely explanation for this individual’s intersex genitalia?

A.absent or inactive testosterone receptors

B.hyposecretion at the level of the hypothalamus

C. hyposecretion at the level of the testes

D. hypersecretion at the level of the pituitary gland

In a complex endocrine pathway, long- loop negative feedback inhibits

A. then hypothalamus and/or the anterior pituitary

B.the primary endocrine gland

C. the target tissue

An unknown hormone is synthesized in the hypothalamus and released from the posterior pituitary. This hormone is released in increasing levels as the posterior pituitary is repeatedly stimulated by feedback from the body. This hormone must be a __ and is part of a ____.

A.neurohormone, negative feedback loop

B. steroid hormone, positive feedback loop

C. neurohormone, positive feedback loop

D. catecholamine, negative feedback loop

Hormones act on target cells by controlling:

A.rates of enzymatic reactions

B.transport across cell membranes

C.gene expression and protein synthesis

D.B and C

E.A, B, and C

When a chemical messenger operates through a second messenger system:

A.The chemical messenger must travel through the first (cell) membrane as well as the second (nuclear) membrane

B.The chemical messenger changes to a second class when bound to the membrane receptor

C.The cell membrane receptor must communicate with the rest of the cell through action of a second protein.

Answer 1