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Endocrine System
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Endocrine System
Why are the receptors for amino acid-based hormones on the outside surface of the cell membrane?
Cells can respond faster when the hormone does not need to enter the cell.
Amino acid-based hormones cannot penetrate cell membranes.
Lysosomes in the intracellular fluid digest amino acid-based hormones.
Amino acid-based hormones have no role in activating genes in the nucleus.
Amino acid-based hormones are not lipid soluble.
Author:
rikazzz
Comment
Endocrine System
From which organ is aldosterone released?
The hypothalamus
The adrenal medulla
The kidney
The adrenal cortex
Aldosterone is a “mineralocorticoid” hormone which gives a clue that it comes from the cortex of the adrenal glands.
Author:
rikazzz
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Endocrine System
Which of the following glands have both exocrine and endocrine functions?
The pancreas
The thymus
The parathyroid
The pituitary
The pancreas produces digestive enzymes and secretes them via a duct into the duodenum – the exocrine function. It also produces insulin and glucagon for release into the circulation – its endocrine role. The other three choices are solely endocrine organs.
Author:
rikazzz
Comment
Endocrine System
Which one of the following is NOT part of the endocrine system?
The islets of Langerhans (pancreatic islets)
The thyroid gland
The acini cells of the pancreas
The parathyroid glands
The acini cells produce digestive enzymes.
Author:
rikazzz
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Endocrine System
What does insulin do?
It lowers blood sugar level.
It causes the breakdown of glycogen to glucose.
It increases metabolic rate.
It hydrolyses glucose into ATP.
Insulin stimulates the uptake of glucose into cells from the blood.
Author:
rikazzz
Comment
Endocrine System
Which hormone(s) increases the reabsorption of Ca++ from the filtrate in the kidney tubule?
Calcitonin
Mineralocorticoids
Parathyroid hormone
Aldosterone
PTH causes increased calcium absorption and hence increases blood calcium level.
Author:
rikazzz
Comment
Endocrine System
Which of the following organ(s) are NOT endocrine organs?
Renal
Adrenal
Thyroid
Parathyroid
Renal gland is another name for the kidney.
Author:
rikazzz
Comment
Endocrine System
Which of the following secretes growth hormone?
The adrenal glands
The thyroid gland
The posterior lobe of the pituitary gland
The anterior lobe of the pituitary gland
The anterior lobe produces and releases GH.
Author:
rikazzz
Comment
Endocrine System
What effect does insulin have?
It increases metabolic rate.
It causes the breakdown of glycogen to glucose.
It lowers blood sugar level.
It stimulates gluconeogenesis.
Glucose stimulates enhanced membrane transport of glucose into body cells and inhibits glycogenolysis and gluconeogenesis. This lowers blood glucose level.
Author:
rikazzz
Comment
Endocrine System
Which hormones does the pancreas produce?
Epinephrine and norepinephrine
Oxytocin and antidiuretic hormone
Glucagon and insulin
Glucocorticoids and aldosterone
The pancreatic islets produce these hormones which manage the concentration of glucose in the blood.
Author:
rikazzz
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