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Bio 202 Module 1
Terms in this set (43)
Which group of messengers is defined as acting on cells within the same tissue?
A major difference between neurotransmitters and hormones is that hormones reach their destination via ?
A major determinant of a hormone's mechanism of action is __________.
whether the hormonal molecule is hydrophobic or hydrophilic
Receptors for steroid hormones are commonly located?
inside the target cell (Uses secondary messenger system)
Interaction with a membrane-bound receptor will transduce the hormonal message via?
The second messenger-activating hormones circulate in minute quantities because:
small concentrations of hormone can activate many intracellular signals via amplification
In order for a hormone to activate a target cell, the target cell must possess?
When the pancreas releases insulin in direct response to blood glucose, this is an example of ________ stimulation.
When an infant suckles at its mother's breast the mothers neurohypophysis releases oxytocin. This is an example of ________________ stimulation
When the ovaries secrete estrogen in response to the hormone GnRH, this is an example of ________ stimulation.
Blood levels of hormones are kept within very narrow ranges by _________________ mechanisms
Which hormone is produced in the hypothalamus
Secretions from the corticotrophs activate cells of the _________________, While secretions from the gonadotrophs affect cells of the ________________
adrenal cortex and gonads
A patient is displaying high volumes of urine output and severe dehydration. The most likely cause is _________.
hyposecretion of ADH
Which of the following is an indirect effect of PTH?
Increasing calcium absorption in the intestines
A patient is losing weight rapidly, sweating profusely, and is always anxious. The patient may be suffering from _______.
Occasionally, a female patient will experience hirsutism, or excessive facial hair growth. However, blood tests reveal that her levels of testosterone are normal for a female. Another cause could be hyper secretion of
___________________ is the adrenal hormone responsible for maintaining appropriate blood sodium levels
__________________ triggers secretion of aldosterone
increased K+ and angiotensin II
During times of stress, elevated levels of _______ often occur, which explains why we get a cold during final exam time.
Along with the sympathetic nervous system, the __________ is the other primary mediator of acute stress.
Which of the following is not an action of glucagon
Transport of glucose into most body cells
The secretion of _________________ helps regulate our circadian rhythms
The thymus secretes the hormones
thymopoietin, thymosin, thymulin
Which of the following structures produces a hormone responsible for stimulating red blood cell production
Which of the following structures produces a precursor to hormonal vitamin d, important for Ca2+ regulation
In general, the endocrine system is in charge of body processes that happen slowly, such as cell growth. Faster processes like breathing and body movement are controlled by the _________________________
The brain contains these three glands:
Pituitary gland, pineal gland, and hypothalamus
__________________ are chemical messengers that transfer information and instructions from one set of cells to another
Once a hormone is secreted, it travels from the endocrine gland that produced it through the bloodstream to the cells designed to receive its message. These are called _________________________
Target cells (or target organs)
The pancreas produces two important hormones:
Glucagon and insulin
If the pancreas doesn't produce enough insulin the result is
________________________ hormone controls the level of calcium in the blood
Parathyroid hormone or PTH
The thyroid gland is involved in _________________, the process by which the fuel in the food we eat is converted into cellular energy
When hormone levels reach a certain normal amount on the blood, the endocrine system has a built-in turnoff process. It is considered a ____________ feedback system.
Negative feedback system (birthing contractions are an example of positive feedback)
The pineal gland secretes _____________
If the pituitary glands release hormones that stimulate the gonads to produce sex hormones too early, some kids may experience __________ at a very young age
What's a hormone
A chemical messenger that travels in the blood to transfer information/ instructors to a target cell/ organ
The body makes more than 20 hormones, each with a specific function. How is it that hormones know exactly which tissues and organs to communicate with?
The target cells/ organs have receptors for those specific hormones
After consuming a banana split which hormone would be expected to increase
Which gland is responsible for the fight or flight response
Which gland may enlarge (goiter) due to an iodine deficiency?
Hormones can be made of
Carbohydrates, lipids, and proteins
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