BIOL 223 EXAM 1| QUESTIONS AND ANSWERS | VERIFIED AND
WELL DETAILED ANSWERS | LATEST EXAM UPDATE
anatomy - CORRECT ANSWER - study of internal and external structures of
the body and the physical relationships among body parts (gross and
microscopic)
physiology - CORRECT ANSWER - study of how organisms perform their
vital functions
homeostasis - CORRECT ANSWER - the maintenance of a relatively constant
internal environment
homeostatic regulation - CORRECT ANSWER - adjustment of physiological
systems to preserve homeostatsis
body temp, water level, levels of calicium, blood pressure/heart rate, O2/CO2
levels, blood sugar level - CORRECT ANSWER - What are some examples of
homeostatic regulation?
Dynamic process, fluctuation within normal range, result to change in the
environment - CORRECT ANSWER - Three phrases that describe
homeostatsis
receptor - CORRECT ANSWER - a sensor that recognizes a stimulus
stimulus - CORRECT ANSWER - an environmental change that causes a
change in the body
,control center - CORRECT ANSWER - processes information from the sensor
effector - CORRECT ANSWER - produces an activity in the body
autoregulation (intrinsic) - CORRECT ANSWER - Typically a localized
response that causes a change in the cells, tissues, or organ systems
Extrinsic regulation - CORRECT ANSWER - A nervous or endocrine system
response that produces a widespread body response
negative feedback - CORRECT ANSWER - Response in which the receptor
senses a stimulus (environmental factor that is outside the normal range),
control center activates effector, and the effector corrects the situation. Ex:
blood vessels dilating, sweating increases; vessels constrict, sweating decreases
positive feedback - CORRECT ANSWER - Response in which the receptor
senses a stimuli, the control center activates the effector, and the effector
exaggerates the condition. Less common kind of feedback. Ex: contractions
when giving birth, blood clotting
Being pushed outside the normal limits: infection, injury, genetic abnormality -
CORRECT ANSWER - What can cause homeostatic mechanisms to fail?
disease and death - CORRECT ANSWER - What are some results if
homeostatic mechanisms fail?
symptoms - CORRECT ANSWER - A subjective, not easily measurable
description of how a person feels
, signs - CORRECT ANSWER - Objective and physically observable issues or
levels ie. x-ray, MRI, etc.
O, C, H, N - CORRECT ANSWER - What are the most abundant elements in
the human body?
Ca, P, K, Na, S, Cl, Mg, Fe, I - CORRECT ANSWER - Give some examples
of trace elements.
High heat capacity, universal solvent - CORRECT ANSWER - Name some
important properties of water.
electrolytes - CORRECT ANSWER - soluble inorganic molecules whose ions
can conduct electrical current in solution
salt - CORRECT ANSWER - an electrolyte whose cation is not hydrogen and
whose anion is not hydroxide
They can remove or replace hydrogen ions in a solution to maintain the pH of
our body fluids - CORRECT ANSWER - Why are buffers important in the
body?
chemical bonds - CORRECT ANSWER - sharing of electrons between atoms
molecule - CORRECT ANSWER - 2 or more atoms held together by chemical
bonds
chemical reaction - CORRECT ANSWER - chemical bonds are formed or
broken down
WELL DETAILED ANSWERS | LATEST EXAM UPDATE
anatomy - CORRECT ANSWER - study of internal and external structures of
the body and the physical relationships among body parts (gross and
microscopic)
physiology - CORRECT ANSWER - study of how organisms perform their
vital functions
homeostasis - CORRECT ANSWER - the maintenance of a relatively constant
internal environment
homeostatic regulation - CORRECT ANSWER - adjustment of physiological
systems to preserve homeostatsis
body temp, water level, levels of calicium, blood pressure/heart rate, O2/CO2
levels, blood sugar level - CORRECT ANSWER - What are some examples of
homeostatic regulation?
Dynamic process, fluctuation within normal range, result to change in the
environment - CORRECT ANSWER - Three phrases that describe
homeostatsis
receptor - CORRECT ANSWER - a sensor that recognizes a stimulus
stimulus - CORRECT ANSWER - an environmental change that causes a
change in the body
,control center - CORRECT ANSWER - processes information from the sensor
effector - CORRECT ANSWER - produces an activity in the body
autoregulation (intrinsic) - CORRECT ANSWER - Typically a localized
response that causes a change in the cells, tissues, or organ systems
Extrinsic regulation - CORRECT ANSWER - A nervous or endocrine system
response that produces a widespread body response
negative feedback - CORRECT ANSWER - Response in which the receptor
senses a stimulus (environmental factor that is outside the normal range),
control center activates effector, and the effector corrects the situation. Ex:
blood vessels dilating, sweating increases; vessels constrict, sweating decreases
positive feedback - CORRECT ANSWER - Response in which the receptor
senses a stimuli, the control center activates the effector, and the effector
exaggerates the condition. Less common kind of feedback. Ex: contractions
when giving birth, blood clotting
Being pushed outside the normal limits: infection, injury, genetic abnormality -
CORRECT ANSWER - What can cause homeostatic mechanisms to fail?
disease and death - CORRECT ANSWER - What are some results if
homeostatic mechanisms fail?
symptoms - CORRECT ANSWER - A subjective, not easily measurable
description of how a person feels
, signs - CORRECT ANSWER - Objective and physically observable issues or
levels ie. x-ray, MRI, etc.
O, C, H, N - CORRECT ANSWER - What are the most abundant elements in
the human body?
Ca, P, K, Na, S, Cl, Mg, Fe, I - CORRECT ANSWER - Give some examples
of trace elements.
High heat capacity, universal solvent - CORRECT ANSWER - Name some
important properties of water.
electrolytes - CORRECT ANSWER - soluble inorganic molecules whose ions
can conduct electrical current in solution
salt - CORRECT ANSWER - an electrolyte whose cation is not hydrogen and
whose anion is not hydroxide
They can remove or replace hydrogen ions in a solution to maintain the pH of
our body fluids - CORRECT ANSWER - Why are buffers important in the
body?
chemical bonds - CORRECT ANSWER - sharing of electrons between atoms
molecule - CORRECT ANSWER - 2 or more atoms held together by chemical
bonds
chemical reaction - CORRECT ANSWER - chemical bonds are formed or
broken down
