PHYSIOLOGY EXAM 1 QUESTIONS AND
DETAILED CORRECT ANSWERS
A condition NOT regulated by a negative feedback loop
would be: - correct answer- Childbirth
A transverse plane will cut a body or organ into -
correct answer- superior and inferior portions.
An embryonic stem cell undergoes _____ to become a
neuron. - correct answer- differentiation
Choose the directional term that would make the
following sentence correct. The heart is _____________
to the liver. - correct answer- superior
Choose the directional term that would make the
following sentence correct. The sternum is
_____________ to the heart. - correct answer-
anterior
,Describe a feedback system and list its general
components. - correct answer- A feedback loop
is a cycle of events in which the status of the body
condition is monitored, evaluated and changed to
maintain homeostasis. A feedback system will include a
receptor that detects stimuli, a control center that
receives the input from the receptor and generates an
output, and an effector that receives the output and
produces a response.
Describe the anatomical position. - correct
answer- In the anatomical position, the subject
stands erect facing the observer with the head level and
the eyes facing forward. The feet are flat on the floor and
directed forward and the arms are at the sides with the
palms turned forward.
Describe the differences between positive and negative
feedback systems. - correct answer- A positive
feedback system will strengthen or reinforce a change in
one of the body's controlled conditions while a negative
, feedback system will reverse a change in a controlled
condition.
Discuss the importance of body fluids and which one is
considered to be the body's internal environment. -
correct answer- An important aspect of
homeostasis is maintaining the volume and composition
of body fluids, which are dilute, watery solutions
containing the dissolved substances needed to sustain
life. The fluid within cells is intracellular fluid (ICF) and the
fluid found outside of cells is extracellular fluid (ECF). The
ECF consists of interstitial fluid, blood plasma, lymph,
cerebrospinal fluid, synovial fluid, aqueous humor, and
vitreous. The ECF called interstitial fluid, which is the fluid
found in the narrow spaces between cells and tissues, is
also known as the body's internal environment. This is
due to the fact that the proper functioning of body cells
depends of precise regulation of the composition of the
interstitial fluid surrounding them.
During a visit to your doctor, you complain about
headache and nausea. These changes in your body
functions are considered to be - correct answer-
symptoms.