Endocrine Chapter 16 Flashcards
the nervous and endocrine systems are similar because they both
control homeostasis
help maintain equilibrium
BLANK regulates cells at a distance while BLANK regulates adjacent cells
hormone; paracrine
the term gland is broadly defined as a tissue or organ that
secretes a substance into or onto the body
The pituitary is the “master” endocrine gland, because:
it makes several tropic hormones
Secondary messenger systems are used by targets of:
endocrine glands that make non-steroidal hormones
Whether or not a cell responds to a hormone depends on:
the presence of receptors in or on the cell
All the following represent mechanisms that terminate target cell activation EXCEPT:
Positive feedback of the response on the gland that made the hormone
Increase of cAMP levels
Which of the following is the THIRD step (among this list) in the process:
receptor binding
activation of the target tissue
distribution via vessels
stimulation of the gland
hormone secretion
distribution via vessles
Steroidal hormones affect their targets via: 1. intracellular receptors, 2. membrane bound receptors, 3. secondary messengers, 4. transcription factors
1 and 4
Which of the following is a non-steroidal hormone:
melatonin
Secretion from the posterior pituitary is controlled by:
action potentials from the hypothalamus
Thyroid hormone is the most permissive because it influences _________________ activity:
basal-metabolic
With a TRH-secreting tumor in the hypothalamus, one’s blood tests could most likely show:
high T3, high TSH
The ____________ has both endocrine and reproductive function:
testis
The _____________ gland makes hormones that play a major role in regulating sleep:
pineal
