NLN science review 2

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sysole

when the heart contracts, the pressure increases

diastole

when the heart relaxes, the pressure decreases

coronary circulation

the circulation of blood to the heart

pulmonary circulation

the circulation of blood to the lungs

systemic circulation

the circulation of blood throughout the body

white blood cells

less abundant, involved in host immune defense

platelets

pieces of cells important in blood clotting

lymph nodes

special pockets in lymphatic system where lymph is filtered

arteries

transport blood away from the heart

veins

transport blood to the heart

lactic acid

produced during anaerobic respiration, is a cause of sore muscles after strenuous exercise

sensory neurons

transmit impulses from sense organs and receptors

interneurons

make up brain and spinal cord

motorneurons

carry impulses from interneurons to skeletal and visceral muscles

somatic branch

concerned with external environment

autonomic branch

concerned with internal environment

reflex arc

carries out quick, simple, and automatic responses to certain stimuli

cerebrum

complex and high level thinking

cerebellum

muscular coordination and balance

medulla

body temperature, blood pressure, breathing

hormones

chemicsl that act as messengers and that help control the important processes of growth, metabolism, reproduction, osmotic balance, and development

osteoarthritis

a degenerative bone and joint disease

rheumatoid arthritis

a degenerative joint disease caused by autoimmune response

osteoporosis

a disease caused by calcium loss

ligaments

connect bones to bones

tendons

connect bones to ligaments

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