PHYSIOLOGY 2 LAB BIO202L
WORKSHEETS FINAL PAPER 2026
COMPLETE SOLUTIONS AND CORRECT
ANSWERS GRADED A+
⩥ What is negative feedback within homeostasis? and example. Answer:
the response reduces or shuts off the original stimulus regulation of body
temp (nervous mechanism) regulation of blood volume by ADH
(endocrine mechanism)
⩥ What separates living beings from nonliving objects?. Answer: Living
organisms are able to maintain their boundaries, move, respond to
environmental change, digest nutrients, carry out metabolism, dispose of
wastes, reproduce and grow. while inanimate objects do not exhibit all of
these
⩥ what name is given to all chemical reactions that occur within body
cells. Answer: metabolism
⩥ Why is it necessary to be in a pressurized cabin when flying at 30,000
feet?. Answer: because the atmosphere is thinner at high altitudes and
the amount of oxygen entering the blood under such conditions may be
insufficient to maintain life
, ⩥ What's the process of negative back for regulation of blood volume by
ADH. Answer: Receptors sense decreased blood volume, control center
in hypothalamus stimulates pituitary gland to release antidiuretic
hormone ADH, ADH causes the kidneys (effectors) to return more water
to the blood.
⩥ What is positive feedback examples. Answer: the response enhances
or exaggerates the original stimulus; exhibits an amplifying effect;
usually controls infrequent events ex: enhancement of labor contractions
by oxytocin, platelet plug formation and blood clotting
⩥ Homeostatic imbalance is the ...what does this cause?. Answer:
disturbance of homeostasis increases risk of disease, contributes to
changes associated with aging, may allow destructive positive feedback
mechanisms to take over (heart failure)
⩥ the head is _______ to the abdomen. Answer: superior
⩥ the navel is ______ to the chin. Answer: inferior
⩥ the breastbone is _____ to the spine. Answer: anterior (ventral)
⩥ the heart is _____ to the breastbone. Answer: posterior (dorsal)