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.