Ch.11 Quiz Flashcards
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Which of the following explain how physical activity can increase cellular sensitivity to insulin?
Multiple Choice
Upregulation of GLUT4 receptors
Continuous production of insulin leads to a priming effect on the cells
Desensitization of the glucagon receptors, increases the sensitivity of the cells to insulin
Pulsatile secretion of insulin during the activity leads to upregulation
Upregulation of GLUT4 receptors
Hormones that can pass through the plasma membrane are ________ and are called ________.
polar; hydrophilic
nonpolar; hydrophilic
nonpolar; hydrophobic
polar; hydrophobic
nonpolar; hydrophobic
What is the action of the signaling molecules activated by the insulin-tyrosine kinase second messenger system?
Insertion of glucose carrier proteins into the plasma membrane
Hydrolysis of glycogen and secretion of glucose
Transport of insulin into the cell
All of the choices are correct.
Insertion of glucose carrier proteins into the plasma membrane
Water-soluble hormones differ from lipophilic hormones, in that ________.
lipophilic hormones utilize second messengers to impact protein synthesis within the cell
water-soluble hormones never enter the cell
water-soluble hormones require transport proteins to reach their target cells
water-soluble hormone secretion is always under hypothalamic control
water soluble hormones never enter the cell
Second messengers generated by the actions of phospholipase C ________.
are inhibited by the actions of caffeine
are stimulated by phosphodiesterases
stimulate gene transcription
may activate calmodulin
may activate calmodulin
Thyroid hormones bind to receptors that ________.
stimulate production of diacylglycerol
activate tyrosine kinase
stimulate the production of cyclic AMP
regulate gene transcription
regulate gene transcription
The posterior pituitary gland ________.
releases hypothalamic hormones, but does not produce its own
releases its hormones in response to stimulation by hormones from the hypothalamus
synthesizes oxytocin, which plays a vital role in inducing labor
regulates the secretion of hormones produced in the anterior pituitary gland
releases hypothalamic hormones, but does not produce its own.
What is the function of the hypothalamo-hypophyseal tract?
Transports releasing hormones from the hypothalamus to the anterior pituitary
Transports nerve impulse from the hypothalamus to the anterior pituitary
Transports hormones and nerve impulses from the hypothalamus to the posterior pituitary
All of the choices are correct.
Transports hormones and nerve impulses from the hypothalamus to the posterior pituitary
Most target organ control on the anterior pituitary gland is due to ________.
negative feedback inhibition
positive feedback effect
positive feedback inhibition
negative feedback
negative feedback inhibition
The adrenal cortex is NOT involved in regulation of ________.
reproduction
Na+ balance
Ca2+ balance
blood glucose
Ca2+ balance
Physiological responses to stress would NOT include ________.
increased secretion of epinephrine and norepinephrine
increased secretion of ACTH
increased immune response
increased secretion of glucocorticoids
increased immune response
Which of the following is NOT one of the three functional categories of corticosteroids?
Sex steroids
Eiocsanoids
Mineralocorticoids
Glucocorticoids
Eiocsanoids
Hypothyroidism could lead to elevated prolactin levels because ________.
low levels of T3 and T4 decrease prolactin
TRH would cause negative feedback to prolactin
TRH stimulates prolactin release
prolactin stimulates TRH production
TRH stimulates prolactin release
Choose the incorrect statement regarding calcitonin.
It is made by follicle cells of the thyroid.
It inhibits loss of calcium by bones.
It lowers blood calcium levels.
All of the choices are correct.
It is made by follicle cells of the thyroid.
What amino acid of the protein colloid in thyroid follicles does iodine bind to?
Threonine
Alanine
Serine
Tyrosine
Tyrosine
