Chapter 7 Flashcards
What is permissiveness in hormone interactions?
It is where one hormone cannot fully exert its effects unless a second hormone is present. (needs help from a second hormone to do its job)
Name 2 hormones that manage stress
- Cortisol
- Adrenocorticotropic hormone (ACTH)
What is gluconeogenesis?
It is the producing of glucose (sugar) from its own breakdown products or from the breakdown products of lipids (fats) or proteins
What happens to your body when you are stressed for short or little amount of time? (in regards to fat)
Your body goes through lipolysis and you lose fat
What happens to your body when you are stressed for long periods amount of time? (in regards to fat)
You store more fat and you gain more fat in you body
Name 4 hormones that promote growth and development
- Growth Hormone (GH
- Thyroid hormones ( T4 & T3)
- Follicle stimulating hormone (FSH)
- luetenizing hormone
Name 4 hormones that increase blood glucose levels
- Cortisol
- Glucagon
- Epinephrine
- Growth hormone
Name 4 hormones that increase blood pressure, and how does it happen in each of these hormones?
- Antidiuretic (ADH or vasopressin)- Increases blood pressure because of water reabsorption in the kidneys
- Thyroid hormones (T4 & T3)- It increases your blood pressure by Helping you be more sensitive to epinephrine and norepinephrine (the flight of flight hormones)
- Catecholamines (epinepthrine and norepinphrine)- By doing vasoconstriction (contracting the smooth muscles in blood vessels)
- Aldosterone- It increases blood pressure by increasing reabsorption of Na+ in the kidney (so the water stays in the kidney), increases desire for salty foods
If thyroid hormones are high will the TSH and the TRH be high or low in the hypothalamus, anterior pituitary, and endocrine organ cascade?
TRH and TSH will low because of the negative feedback loop (already have good thyroid hormone levels sot they do not need TSH and TRH to be active and make more)
If the thyroid hormones are low will the TSH and TRH be high or low in the hypothalamus, anterior pituitary, and endocrine organ cascade?
TRH and TSH will increase because of the negative feedback loop (trying to get the thyroid levels up)
What type of cells secrete thyroid hormones (T3 & T4) in the thyroid gland?
Follicular cells
What cells in the thyroid gland secrete calcitonin for calcium regulation?
Parafollicular cells
What is required to synthesize thyroxine hormones?
Iodine
What are the energy effects of the thyroid hormones (T3/T4)?
- helps with red blood cell formation
- maintains sensitivity to oxygen and CO2
- helps with oxygen consumption
- utilizes glucose effectively
- helps with metabolizing fats, carbs, and protein
What are the growth effects of the thyroid hormones (T3/T4)?
- It allows GH to exert its full effects
- bone growth in children
- neural development
- promotes secretion of growth hormone
- heat production, especially in children
What are the ANS effects of the thyroid hormones (T3/T4)?
- increases heart heart and blood pressure by contractions
- Increases sensitivity to sympathetic stimulation
How do children regulate their heat so well?
By the thyroid hormones
Why are the functions of the thyroid hormones required for most cells?
It increases their functions, metabolism, and essentially controls how much energy the cells can make (metabolism)
How does hypothyroidism and hyperthyroidism effects the body and its cells?
Hypothyroidism- it affects your body by slowing everything down (metabolism) and making you more weak constant fatigue because your cells aren’t functioning properly, feeling cold etc.
Hyperthyroidism- It affects your body by increasing everything (metabolism), So it increases heart rate which can lead to heart diseases, causes osteoporosis by speeding up bone remodeling instead of reabsorbing calcium
Why is cortisol considered the stress hormone
Because it is released when your body is in a stressful situation
what actions does cortisol do in regards to calcium?
It blocks the intestines from absorbing calcium and it increases the excretion of calcium from the kidney
What does cortisol do (actions) in high stressful situation?
- Increases glucose levels
- decreases inflammation
- Prevents hypoglycemia
- Makes you more susceptible to illness
What does cortisol do (actions) in non stressful situations?
- it is permissive to glucagon and catecholamines (helps them do their full potential)
- cortisol balances out your glucose levels by going against insulin
What is the difference between calcitonin and parathyroid hormones in calcium regulation?
Calcitonin- Responds to hypercalcemia in the blood (high calcium levels in the blood), Which slows down osteoclasts which reduces the rate of calcium being released, has the kidney excrete calcium, and prevents the intestines from absorbing calcium
Parathyroid hormones- Responds to hypocalcemia in the blood (low calcium levels), Which increases osteoclasts and increases calcium storage in bones, and increases the absorption of calcium in the intestines,
What is the difference between type 1 and type 2 diabetes?
Type 1- It is insulin dependent, the pancreas cannot produce insulin, an autoimmune disorder, not that genetic, have to inject insulin, often develops during childhood, need of insulin pump
Type 2- It is very genetic, the pancreas produces insulin but the cells cannot respond to the insulin properly (GLUT 4 receptors), so it is insulin resistant, most common, associated with obesity
What is the big difference between insulin and glucagon?
Insulin- Decreases blood glucose levels
Glucagon- Increases blood glucose levels
What are the target cells that Insulin and Glucagon target?
Insulin- Most cells in their membranes (EXCEPT neurons and kidneys)
Glucagon- Liver, adipose tissues
What is the difference between body cell response when Insulin or glucagon bind to the cells?
Insulin- Helps with glucose uptake in the cells by increasing transport proteins, enhances ATP production, helps with glycogen formation so glucose can be stored, helps with amino acid absorption and protein synthesis, helps with absorption of glucose in adipose tissue which makes more triglycerides
Glucagon- Helps with breakdown of glycogen in skeletal muscles and liver cells, helps breakdown triglycerides, helps with production of glucose in the liver
What is the difference in liver response when Insulin or glucagon is involved?
Insulin- Helps the liver take more glucose to form it into glycogen to be stored
Glucagon- It turns the stored glycogen back into glucose and releases out to the bloodstream
what is the difference in adipocyte response between insulin and glucagon?
Insulin- by helping glucose uptake and makes more triglyceride, and it stops the breaking down of triglycerides and forms them
Glucagon- It helps breakdown of triglycerides to use for glucose,
What are the differences between acromegaly and gigantism?
Acromegaly- overgrowth in hands, feed, jaw is chickened, skin tags, starts when you are older
Gigantism- Continued growth of long bones and results in long limbs and tall stature, starts at young age
What are the similarities between Acromegaly and gigantism?
Growth Hormone needs to be reduced in the person. Caused by hypersecretion of the growth hormone, coarse body hair
Which of these hormones are lipophobic and require a membrane receptor, and which hormones are lipophilic and DO NOT require a membrane receptor?
Amino acid derivatives
Peptide hormones
Eicosanoids
Steroid hormones
Amino acid derivatives- Lipophobic NEEDS A MEMBRANE RECEPTOR
Peptide hormones- Lipophobic NEEDS A MEMBRANE RECEPTOR
Eicosanoids- Lipophilic NO MEMBRANE RECEPTOR
Steroid hormones- Lipophilic NO MEMBRANE RECEPTOR
What are some examples of Peptide hormones?
- thyroid stimulating hormone
- LH
- FSH
- all hormones of the hypothalamus,
- pancreas hormones
- posterior pituitary gland hormones
What are some examples of amino acid derivatives?
- catecholamines ( epinephrine, norepinephrine, dopamine, melatonin)
What are some examples of Eicosanoids?
- Prostaglandins
- Leukotrienes
- Thromboxane
- prostacyclin
What are some examples of steroid hormones?
- androgens
- estrogen
- progestins
- corticosteroids
- calcitriol
- secreted by reproductive glands, adrenal glands, and kidneys
What do Prostaglandins help with?
vasoconstriction of the blood vessels and blood vessel stuff
Describe a steroid hormone
- They are secreted by reproductive glands, adrenal glands, and kidneys
- Synthesized by cholesterol
What are the differences between steroid hormones, amino derived hormones/peptide hormones
Steroid hormones- DO NOT require membrane receptors to get into the cell (lipophilic)
amino derived hormones/peptide hormones- Require membrane receptors to get into the cell (lipophobic)
What is the difference between an IH hormone and an RH hormone from the hypothalamus?
IH- It prevents synthesis and secretion of hormones from the anterior lobe (stops hormones from going to the target receptor)
RH- It helps secrete and synthesis of one or more hormones in the anterior lobe (Helps hormones be released and go to their target hormone)
What is the role of the hypothalamus in the anterior pituitary gland and the posterior pituitary gland?
Anterior- sends neurohormones to the anterior pituitary gland to activate it so it can send out the different hormones from there
Posterior- The hypothalamus sends ADH and Oxytocin to the posterior pituitary gland and it releases those two hormones from there
What two hormones does the posterior pituitary gland release?
ADH and Oxytocin
What is the difference between the anterior pituitary gland and the posterior pituitary gland?
Anterior pituitary gland- It makes 6 hormones and releases them to turn on endocrine glands or supports other organs WHEN THE HYPOTHALAMUS TELLS IT TO BY SENDING NEUROHORMONES TO IT
Posterior pituitary gland- It DOES NOT MAKE ANY HORMONES it gets 2 hormones from the hypothalamus (ADH and oxytocin) and sends them out when needed
What is the other name for anterior pituitary gland and posterior pituitary gland?
anterior pituitary gland = Adenohypophysis
posterior pituitary gland = Neurohypophysis
What is the hypothalamus, anterior pituitary gland, and endocrine gland cascade?
- The hypothalamus releases RH hormones to the anterior pituitary gland
- The anterior pituitary gland releases the hormone (#1) to the endocrine target organ
- The endocrine target organ responds to the hormone received by the anterior pituitary gland and makes its own hormone (#2)
- When hormone #2 is secreted from the endocrine target organ it send it to the target cells it also drives a negative feedback response which inhibits secretion of the hypothalamus and anterior pituitary hormone
What would happen in the hypothalamus, anterior pituitary gland, and endocrine gland cascade if the hypothalamus was damaged?
The RH hormone would not be released and the cascade would not be able to even start and go to the target organ
What would happen in the hypothalamus, anterior pituitary gland, and endocrine gland cascade if the anterior pituitary gland was damaged?
Hormone #1 would not be able to be released to the endocrine target organ and it wouldn’t be able to carry out its function. There would be an increase in the RH hormone and that would keep secreting
What would happen in the hypothalamus, anterior pituitary gland, and endocrine gland cascade if the Endocrine gland was damaged?
Hormone #2 would not be able to be released to the target cell and it would not be able to inhibit the hypothalamus and anterior pituitary gland from releasing their hormones. So they would continue to release those hormones and wouldn’t be able to stop them.
What is the basic function of Luteinizing hormone in Males and Females?
Males- It secretes testosterone in males
Females- It is the ovulation hormone for females