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(chapter 44, chapter 45) - Coggle Diagram
chapter 44
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How do hormonal circuits link kidney function, water balance, and blood pressure?
Antidiuretic Hormone (ADH): Released by the posterior pituitary gland when blood osmolarity rises, ADH increases water reabsorption in the kidneys by adding aquaporin channels in the collecting ducts.
Renin-Angiotensin-Aldosterone System (RAAS): When blood pressure drops the kidneys release renin, which then helps make angiotensin II.
Atrial Natriuretic Peptide (ANP):When blood pressure is high, the heart releases ANP. This hormone works against RAAS by stopping renin and aldosterone, helping the body get rid of sodium, and lowering blood pressure.
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chapter 45
What are the common aspects of feedback regulation and coordination with the nervous system in hormone pathways?
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How do hormones and other signaling molecules bind to target receptors, triggering specific response pathways?
Hormone Binding: Hormones are secreted molecules that circulate throughout the body. They only affect target cells that have specific receptors for them
Water-Soluble Hormones: These bind to receptors on the cell surface, initiating a signal transduction pathway.
Lipid-Soluble Hormones: These diffuse through the cell membrane and bind to receptors inside the cell, either in the cytoplasm or nucleus.
How do endocrine glands respond to diverse stimuli in regulating homeostasis, development, and behavior?
They achieve this through the secretion of hormones, which are chemical messengers that travel through the bloodstream to target organs and tissues.
Homeostasis:glucocorticoids and mineralocorticoids help maintain glucose levels and regulate salt and water balance, ensuring the body's internal environment remains stable.
Development: Hormones like estrogens and androgens are involved in the development of secondary sexual characteristics and reproductive system maintenance
Behavior: Hormones such as epinephrine and norepinephrine from the adrenal medulla are involved in the "fight-or-flight" response