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Terms in this set (27)
Hormone secretion is usually regulated by _________. For example, an increase in the level of the hormone would lead to a ________ secretion of that hormone.
negative feedback; decreased
Testosterone is responsible for the low voice and muscular development found in males.
Glands that release their secretion through ducts are called __________ glands.
What hormone is involved with the development of immunity?
Parathyroid hormone stimulates ______.
An excessive production of insulin may lead to ______.
A woman has a recent history of broken bones, ulcers and kidney stones. Her physician finds that she has an unusually high blood level of calcium and immediately suspects that her patient is suffering from an excess of ______.
Hormone receptors on the plasma membrane are called ______.
Which of these hormones would be able to cross the plasma membrane by simple diffusion?
Testosterone—a steroid hormone
Which of these hormones would require a carrier protein to travel within the blood?
Estrogen—a steroid hormone
Why is there a higher level of thyroid hormone secreted in cases of pituitary tumors?
Thyroid hormone is secreted in response to hormonal stimulus from the anterior pituitary.
Would insulin, a hormone that is secreted in response to humoral stimulus, be affected by a pituitary tumor?
No, hormones controlled by humoral stimuli would not be affected directly by the pituitary tumor.
Which of the following is NOT a mechanism in which calcitonin lowers the blood calcium level?
Activation of osteoclasts
Insulin causes ______.
a decrease in the concentration of blood glucose
Progesterone and estrogen are produced by the ______.
What gland produces melatonin?
Which hormone is released in response to a high blood calcium level?
The secretion of parathyroid hormone is controlled primarily by the ______.
plasma calcium concentration
Testosterone is solely responsible for sperm production.
Drag a word or phrase into each blank to make it correct, then place these sentences in logical order.
When the blood calcium level drops below normal...
The PARATHYROID GLAND is stimulated.
This gland releases PARATHYROID hormone, which moves via the blood to BONE TISSUE.
PARATHYROID HORMONE then stimulates the activity of OSTEOCLASTS, which break down bone matrix, releasing calcium ions.
The calcium released from bones moves from interstitial fluid to the blood, INCREASING blood calcium levels.
When blood calcium returns to normal levels, the PARATHYROID GLAND is no longer stimulated to secrete PARATHYROID HUMAN
Place the action of the hormone in the box next to the correct hormone.
- Decreases blood glucose level
- Stimulate the conversion of glucose to glycogen
- Aids the movement of glucose into cells
- Increases blood glucose level
- Stimulate the conversion of glycogen to glucose
Which of the following properties are NOT caused by melatonin?
Darkening of the skin
A low blood glucose level stimulates which substance that, when released, causes liver cells to release glucose into the blood?
Which of the following describes an action of an activated G-protein?
Activation of adenylate cyclase or formation of phospholipase C
Beta adrenergic receptor-blocking drugs are often called beta-blockers. These drugs prevent the hormone epinephrine from binding to its G-protein-coupled receptor. In the pathway activated by epinephrine, the activated G-protein would normally activate adenylate cyclase. When the drug is in use, which step(s) is/are prevented?
All of these steps would be prevented in the presence of a beta-blocker drug.
Mastoparan is a toxin derived from wasp venom. The effect of mastoparan is to prevent the G-protein from releasing GDP. When mastoparan is in a cell, which step(s) is/are prevented?
The activation of adenylate cyclase
Steroid hormones most commonly produce their cellular effects by ______.
forming a receptor hormone complex that alters gene expression
THIS SET IS OFTEN IN FOLDERS WITH...
Nervous System Structures
Action Potentials and Signal Transmission
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