A&P II LECTURE FINAL CH.10

The nervous system

is ideal for crisis management.

The hypothalamus transports hormones to the posterior pituitary by way of

neural axons, directly.

When a protein or peptide hormone binds to receptors on the surface of a cell,

a second messenger appears in the cytoplasm.

The hormone leptin is secreted by (the) ________.

adipose tissue

Steroid hormones

are structurally similar to cholesterol.

Steroid hormones

bind to intracellular receptors.

Generally, the actions of hormones

can produce complex changes in physical structure and physiological changes.

All hormones are

chemical messengers.

Peptide hormones are

composed of chains of amino acids.

Hormones from the ________, which travel in the hypophyseal portal vessels, alter the activity of the anterior pituitary.

hypothalamus

The highest level of endocrine control is provided by the

hypothalamus.

Cyclic AMP often causes activation of

kinase enzymes.

Which of the following hormones is an amino acid derivative?

melatonin

Hormone concentration levels are most commonly controlled by

negative feedback.

Which of the following hormones bind to membrane receptors and activate G-proteins?

peptide hormones

Hypothalamic hormones that stimulate the synthesis and secretion of one or more hormones in the anterior lobe are called

releasing hormones.

Peripheral structures sensitive to the presence of hormones are called ________.

target cells

An important second messenger in hormonal action is

cAMP.

In the simplest case, endocrine activity may be controlled by changes in the extracellular fluid composition called ________ stimuli.

humoral

The endocrine system

relies on the release of chemicals that bind to target cells.