A and P II
Home > Preview
The flashcards below were created by user
on FreezingBlue Flashcards.
Modes of action for amino-based acids
- 1. Hormone (first messenger) binds to receptor
- 2. Receptor activates G protein
- 3. G protein activates adenylate cyclase
- 4. Adenylate cyclase converts ATP to cAMP (second messenger)
- 5. cAMP activates protein kinases
Modes of action for steroids (lipid-soluble hormones)
- 1. Diffuse into their target cells and bind with intracellular receptors
- 2. Receptor-hormone complex enters the nucleus
- 3. Receptor-hormone complex binds to a specific region of DNA
- 4. This prompts DNA transcription to produce mRNA
- 5. the mRNA directs protein synthesis
What does thyroid hormone do?
- increases metabolic rate and heat production
- maintenance of blood pressure
- regulation of tissue growth
- development of skeletal and nervous systems
- reproductive capabilities
Mode of action for calcitonin
primary hormone for blood calcium levels
What is aldosterone?
- most potent mineralocorticoid
- stimulates sodium reabsorption and water retention by the kidneys
What hormone is secreted by the heart?
Atrial natriuretic peptide (ANP)
What does erythropoietin do? Where is it made?
- signal production of RBC's
- made in kidneys
What are the functions of cortisol?
- keep blood sugar levels constant
- maintain blood pressure by increasing the action of vasoconstrictors
What hormones are produced by ovaries?
estrogen and progesterone
Growth Hormone (GH)
- stimulates most cells, but targets bone and skeletal muscle
- promotes protein synthesis and encourages use of fats for fuel
Adrenocorticotropic hormone (ACTH)
- stimulates the adrenal cortex to release corticosteroids
- secreted by corticotrophs of the anterior pituitary
- secreted by lactotrophs of the anterior pituitary
- stimulates milk production
- stimulates uterine contractions during childbirth
- also triggers milk ejection ("letdown" reflex) in women producing milk
- plays role in sexual arousal and orgasm in M and F
Luteinizing hormone (LH)
- promotes production of gonadal hormones
Follicle-stimulating hormone (FSH)
- stimulates gamete (egg or sperm) production
Another name for adrenal glands?
Another name for anterior pituitary?
Another name for posterior pituitary?
What would you like to do?
Home > Flashcards > Print Preview