Adrenal Cortex physiology

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QuestionAnswer
True or False: 17 a hydroxylase deficiency causes increased androgens in the blood
these 2 enzymes catalze the conversion of pregnenolone to DHEA.
defective gene in lipoid hyperplasia
True or False: Cortisol decreases red blood cell production.
melanocortin receptor that binds ACTH stimulating steroidogenesis
melanocortin receptor involved in pigmentation
conversion of 11-deoxycortisol to cortisol is catalyzed by what enzyme
Cortisol acts to _____ lipolysis.
ADH (vasopressin) and Corticotropin releasing hormone cause the release of what hormone from the anterior pituitary?
these 2 enzymes catalze the conversion of pregnenolone to progesterone
the region of the adrenal cortex that secretes glucocorticoids
Gene responsible for encoding for aldosterone synthase
Gene responsible for encoding 17 a hydroxylase and 17 20 desmolase
the region of the adrenal cortex that secretes androgens
True or False: 17 a hydroxylase deficiency causes increased mineralocorticoids and glucocorticoids.
True or False: The melanocortin family of receptors are G protein coupled receptors.
catalyzes the conversion of progesterone to 11-deoxycorticosterone
True or False: aldosterone synthase deficiency presents with ambiguous genitalia
Gene responsible for encoding 11B hydrolase
inactive form of cortisol
True or False: overstimulation of cortisol can cause diabetes.
Cortisol acts to coordinate actions in the muscle and liver. It causes the release of Amino acids by the muscle for uptake by the liver for what metabolic process?
Secondary Addison's disease is caused by a deficiency of ____.
patients with an adrenal tumor will have high or low levels of ACTH?
melanocortin receptor involved in anorexia
True or False: Glucocorticoid and Mineralocorticoid receptors are intracellular acting primarily by regulating transcription
gene responsible for encoding 11 B hydroxysteroid dehydrogenase
A baby born with 11B hydroxylase deficiency high or low glucocorticoids.
conversion of cholesterol to pregenolone takes place in what organelle
QuestionAnswer
True or False: A female baby born with defective CYP21 has increased production of DHEA, causing ambiguous genitalia.
True or False: Cortisol levels generally peak around midnight.
T/F: Cortisol can only bind the glucocorticoid receptor.
True or False: 17 a hydroxylase deficiency causes increased blood pressure
A baby born with 21 hydroxylase deficiency will have _____ mineralocorticoid and glucocorticoid levels.
pregnenolone is converted to progestrone in which organelle of the cell?
CAH characterized by salt wasting, normal glucocorticoids, normal androgens, and low blood pressure
this congential adrenal hyperplasia occurs as a result of defective CYP11B2
hormone disorder chasracterized by high levels of ACTH. Patients generally have a redistribution of fat to the truncal areas of the body, with muscle wasting at the extremties
A baby born with21 hydroxylase deficiency has ___ blood pressure.
Gene responsible for encoding 21 hydroxylase
steroidogenesis begins with what compound
Primary Addison's disease is caused by a deficiency of ____.
what catalyzes the conversion of cholesterol to pregnenolone?
True or False: A baby born with 11B hydroxylase deficiency will have increased androgen production leading to ambiguous genitalia in females
A baby born with 11B hydroxylase deficiency high or low blood pressure
responsible for the conversion of corticosterone to aldosterone
T/F: Adrenal gland size is proportional to the stimulation of the gland.
A baby born with defective CYP21 will have high or low levels of ACTH?
Pro-opiomelanocortin is the precursor for what hormone released from the anterior pituitary?
can cause ambiguous genitalia in males and absent puberty in females because androgens are not able to be made. can occur as a result of defective CYP17
T/F: Cortisol acts as a negative feedback regulator at the anterior pituitary and hypothalamus
Cortisol cause an increase in gluconeogensis and a _____ in glucose uptake.
True or False: Patients with Cushing's disease have normal circadian rhythm of ACTH release.
no steroids are made in this disorder
Gene responsible for encoding 3B hydroxysteroid dehydrogenase
channel responsible for transporting cholesterol into the mitochondria
catalyzes the conversion of cortisol to cortisone so that it can be inactivated
the region of the adrenal cortex that secretes mineralocorticoids

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