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BIO 202 First Test

Human Anatomy & Physiology II Lecture Test #1

QuestionAnswer
Control system that produces chemical messengers (hormones); interrelated to nervous system, which produces electrochemical signals Endocrine System
Rapid onset; short duration Nervous Frequency Modulated System
Slower onset; longer duration Endocrine Amplitude Modulated System
Have ducts; secretions to body cavities or surfaces of epithelia Exocrine Glands
ductless; secretions into extracellular fluid and then into blood Endocrine Glands
Pituitary, Thyroid, Parathyroid, Adrenals, Pancreas, Ovaries, Testes, Pineal, & Thymus Major Endocrine Glands
4 types of intercellular chemical messengers True (Circulating) Hormone; Local (Tissue) Hormone; Neurotransmitter; Pheromone
________ is the only true hormone; it releases, circulates, and exits Exocrine
2 types of local (tissue) hormone Paracrine (Parahormone); Autocrine (Autohormone)
This intercellular chemical messenger is readily available; released at axon terminal Neurotransmitter
This intercellular chemical messenger releases a chemical signal into the environment; acts usually on same species Pheromone
A chemical messenger (ligand) produced and released in minute amounts into the interstital fluid, enters blood stream, transported to target tissue (one organ or over body); produces change in physiological activity of target cells Traditional Definition of Hormone
Hormones can be... Proteins/Peptides; Amines: Steroids
2 solubility classes of hormones are Water-Soluble; Lipid-Soluble
Which type of hormones are water-soluble? Most hormones
Lipid-soluble hormones are Steroid & Thyroid Hormones
Secretion of hormone includes what two actions Production & Release (it MUST include release!!)
3 patterns of secretion are Chronic; Acute; Cyclic
This pattern of secretion remains elevated; minimally rises & falls; ex: thyroid hormone Chronic
This pattern of hormone secretion increases w/ stimulus; depends on stimulus for levels. ex: adrenaline Acute
This type of hormone secretion is on a "timer". ex: melatonin; ovarian hormones Cyclic (Episodic)
Control of hormone secretions is done through Mostly Negative Feedback (few positive)
The 3 (4) modes of controlling hormone secretions are Neural (nervous); Hormonal: Humoral (other factors; non-neural; non- hormonal); (Maybe a combination of these)
________ is one of two major controls over hormone action. Secretion
Created by: ashval2001
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