How are the hypothalamohypophysial tract and the hypothalamohypophysil portal sy

Question

How are the hypothalamohypophysial tract and the hypothalamohypophysil portal system like?

A. they both terminate in the same part of the pituitary gland

B. they both carry hormones manufactured by the hypophysis

C. they are both composed of blood vessels

D. they both begin in the hypothalamus

E. they both transport hormones to the target(s) of those hormones

#2- Which of th following incorrectly refrences the endocrine system?

A. it is the smallest body system

B. there are only 5 (kinds of) endorcrine organs, but there are many other organs that have endocrine functions

C. there are 4 endocrine organs that produce only one chemical regulator each

D. the hypothalamohypophysil portal system ensures that 8 hormones reach their target in high enough concentrations to the effective, but it actually transports a few dozen chemical regulators.

E. the target of a chemical regulator is where (cells, tissues, or organ) that substance exerts its effect

#3- Which item is false?

A. there are 3 general categories of chemical regulators: hormones, paracrine regulators, and autocrine regulators

B. chemical regulators are "powerful" chemicals (only a small amount is required to produce a significant biological effect), but they are rapidly degraded once released

C. most endocrine disorders involve the release of too little (diabetes mellitus) or too much (acromegaly) of a chemical regulator

D. men do not normally produce progesterone or estrogen

E. hormones that are present in a female only when she is pregnant include chorionic gonadotropin and somatomammotropin

Explanation / Answer

1.D. they both begin in the hypothalamus

2. E . the target of a chemical regulator is where (cells, tissues, or organ) that substance exerts its effect

3.B. chemical regulators are "powerful" chemicals (only a small amount is required to produce a significant biological effect), but they are rapidly degraded once released

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