ZOOL 2403 BOROS LECTURE EXAM 3 NEWEST ACTUAL

ZOOL 2403 BOROS LECTURE EXAM 3 NEWEST ACTUAL

QUESTIONS AND ANSWERS

VERIFIED/ANSWERS.

What is the withdrawal reflex? - ----Answers_---An unconscious reaction to a painful stimulus. A sensory neuron synapses on inter neurons which synapse on motor neurons (more than one synapse occurs)

What is the purpose of polysynaptic reflexes? - ---- Answers_---Help you respond quickly to unexpected stimuli (example in class pulling on tumbleweed)

what does the endocrine system consist of? - ---- Answers_---hypothalamus, pituitary gland, adrenal gland, pancreas, and the thyroid gland

what does your pancreatic islets do? - ----Answers_-- -regulates sugar levels in your body

what does the hypothalamus do? - ----Answers_--- master commander, releases regulatory hormones to the pituitary gland

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what does the posterior lobe of the pituitary gland release? - ----Answers_---oxytocin and ADH

how are the endocrine and nervous systems similar? - ----Answers_---both release chemicals and share many chemical messengers

• systems are linked through the hypothalamus and the

pituitary gland

how are the endocrine and nervous systems different?

• ----Answers_---the nervous system releases

neurotransmitters at a synapse very close to its target.fast and short project

the endocrine system releases hormones into connective tissue and relies on the bloodstream to distribute its secretions far from its target cells. action is slower but lasts longer

PTH and CT hormones together regulate what? - ---- Answers_---regulate calcium levels

whats the major difference between hormones and enzymes? - ----Answers_---hormones circulate throughout the bloodstream enzymes dont 2 / 4

what does the endocrine system regulate and what is the goal - ----Answers_---regulates long term processes like development, growth, reproduction (and aging). regulated by negative feedback and the goal is to preserve homeostasis

what are hormones? - ----Answers_---chemicals that are released from endocrine organs, are distributed by blood, and change the rate of an activity performed by the body (smooth muscle cell activity)

whats homeostasis? - ----Answers_---defined as a stable internal environment. necessary for survival.body systems must function within normal range (body temp, fluid balance)

how does your body maintain homeostasis? - ---- Answers_---your body has receptors that sense a change in stimuli, your hypothalamus receives and processes this info from receptors and has effectors that respond with commands

whats negative feedback? - ----Answers_---what kicks the homeostasis cycle into gear. the response of the 3 / 4

effector negates the stimulus and restores normal function

• roles of the hypothalamus - ----Answers_---as

nervous tissue: controls the ANS,

as the integrator between the nervous and endocrine

system: secretes regulatory hormones

as an endocrine organ: secretes the hormones ADHand

oxytocin

if the stimulus is wrong, the hypothalamus ___ - ---- Answers_---sends the wrong command and homeostasis is never restored

if an effector is messed up.... - ----Answers_---action won't be properly carried out

the posterior lobe of the pituitary gland communicates via - ----Answers_---nervous tissue

blood from the hypothalamus through the pituitary gland flows___ - ----Answers_---one way-the pituitary gland has no communication with the hypothalamus

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