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Alexandria Stanford

Week 13

QuestionAnswer
What is the function of the heart valves To prevent back flow of blood and ensure one way movement through the heart.
What structures acts as the heart's natural pacemaker The sinoatrial (SA) node
What is stroke volume The amount of blood ejected by the ventricle with each heartbeat
What characterizes innate immunity It's immediate, nonspecific, and the body's first lone of defense
What makes adaptive immunity unique It targets specific antigens and creates memory cells
What is the primary function of lymph nodes To filter out lymph and house immune cells that fight infection
What are the two main lymphatic ducts The right lymphatic duct and the thoracic duct
What are the main parts of a neuron Dendrites, cell body, and axon
What is synapse The junction where a neuron communicates with another cell via neurotransmitters
What does the sympathetic nervous system do Activates "fight or flight" responses such as increasing heart rate and dilating airways
What does the parasympathetic system do Promotes "rest and digest" Slows heart rate and stimulates digestion
How do hormones travel through the body Through the bloodstream to targeted cells
What is negative feedback in the endocrine system A regulation mechanism that reverses change to maintain homeostasis
Where does gas exchange occur in the lungs In the alveoli between air and capillary blood
What happens when the diaphragm contracts It flattens and increases chest volume, allowing inhalation
What is the role of digestive enzymes To chemically break down food into absorbable nutrients
What is the primary function of the small intestine Nutrient digestion and absorption
Where does blood filtration occur in the kidney In the glomerulus inside the renal corpuscle
What are the three steps of urine formation Filtration, reabsorption, and secretion
Which hormones regulate blood glucose levels Insulin (lowers blood sugar) and glucagon (raises blood sugar)
 

 



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