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Physio Final

Q&ATerm/Definition
Ligand gated Ion Na+ channel opened by a Stimulus. a ligand is a signal molecule that binds to a receptor. located in the dendrites and soma.
3 phases of action potential stimulus opens Na+ channels (depolarization) K+ channels open (repolarization) resting potential (hyperpolarization)
Autonomic vs Somatic Somatic: regulates the skeletal muscles. includes afferent pathways. Autonomic: visceral effector: smooth muscles, cardiac, glands, fat "involuntary" efferent (flight/fight)
CNS, PNS, ANS CNS: brain and spinal cord - takes incoming sensory info, evaluates, sends out going response. PNS: nerve tissues, cranial nerves, spinal nerves. ANS: regulates involuntary effectors; sympathetic vs parasympathetic.
pancreatic hormones glucagon (moves glucose from storage to blood), insulin (moves glucose from blood to cells), somatostatin ( regulates secretions), Pancreatic polypeptide (GI motility, satiety), ghrelin (boost appetite)
platelets and hemostasis platelet plug formation. within 1-5 seconds platelets adhere to damaged lining ( second step of the 3)
brain center that regulates heart rate. medulla oblongata
innate immune response Mechanical and chemical Barriers (skin, mucosa, secretions), Inflammation (fever), Phagocytosis(neutrophils, macrophages), natural killer cells (kill cancer/virus), interferon, complement(lysis), toll-like receptors.
ventilation negative feedback loop Increase Pco2 > carotid, central, and aortic chemoreceptors > signal thoracic and diaphragm > increase respiration removal of co2.
mechanical and chemical digestion Mechanical: the movement of the digestive tract. mastication, deglutition, peristalsis, segmentation. Chemical: changes in chemical composition. hydrolysis, enzymes,
total body water content. water represents 75% of body wt. 10% varies on sex. two major fluid compartments: extracellular and intracellular.
Created by: cbgarcia
 

 



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