Physiology First Exam TopHat UPDATED ACTUAL Exam Questions and CORRECT Answers
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Course
Physiology
Institution
Physiology
Physiology First Exam TopHat UPDATED
ACTUAL Exam Questions and CORRECT
Answers
The cell bodies of all of the individual motor neurons that activate groups of muscle fibers in
each of the muscles in the legs and feet are located in the lower portions of the spinal cord.
How long will their ...
Physiology First Exam TopHat UPDATED
ACTUAL Exam Questions and CORRECT
Answers
The cell bodies of all of the individual motor neurons that activate groups of muscle fibers in
each of the muscles in the legs and feet are located in the lower portions of the spinal cord.
How long will their axons have to be? - CORRECT ANSWER- ✔✔2-3 feet
Name some organs that contract involuntarily and contain "smooth" muscle. - CORRECT
ANSWER- ✔✔small arteries, larger airways in the lungs, bladder
The following figure is from what tissue? Why does this tissue have intercalated discs? -
CORRECT ANSWER- ✔✔heart; allows cells to work synchronously
To enter the blood from the tiny air sacs deep in the lung, oxygen must diffuse across a layer
of epithelial tissue. What kind of epithelial tissue would be best suited for this process? -
CORRECT ANSWER- ✔✔extremely thin, single-cell squamous
Which of the following are exocrine glandular secretions? (the others are endocrine
secretions) - CORRECT ANSWER- ✔✔sweat, tears
The concentration of water (osmolarity) of the intracellular and extracellular fluid are equal,
but the electrolyte concentrations of the two fluid compartments are very different. How is
this possible? - CORRECT ANSWER- ✔✔selective permeability of cell membranes
active transport mechanisms move ions in specific directions
A new glucose monitoring system for persons with diabetes mellitus is illustrated below. The
implanted sensor is placed in the space between capillaries and cells (figure). The sensor is
implanted in a fluid that is - CORRECT ANSWER- ✔✔part of the extracellular fluid
A 20-year old college junior brags that she gave extracellular fluid but didn't give blood to the
Red Cross. If she's right, she must have donated - CORRECT ANSWER- ✔✔interstitial fluid
,Normal plasma calcium ion (Ca2+) levels are 9 - 10.5 mg/dL. For a person with
hypercalcemia (plasma Ca2+ = 11.8 mg/dL), the increase in Ca2+ above normal serves, for
the regulatory systems that control plasma Ca2+ levels, as an - CORRECT ANSWER-
✔✔error signal
The picture shows a typical P215 student preparing for class. Because you are a true sweat
expert, you know that sweating reduces body temperature because - CORRECT ANSWER-
✔✔the heat of vaporization of water is taken from the skin
Your roommate asks you to pick up some endocrine secretions at the store on the way home.
So, dutifully, you buy a bottle of - CORRECT ANSWER- ✔✔thyroid hormones
All of the following contain muscle cells that contract involuntarily. Which one is composed
of cells that are striated and connected by intercalated disks? - CORRECT ANSWER-
✔✔heart
Why are the alveoli more effective—per unit surface area—than the skin for exchange of
CO2 and O2 with the environment? - CORRECT ANSWER- ✔✔the epithelial layer in the
alveoli is much thinner than the skin epithelium
In which of the following regions would the acidity (pH), solute concentration (osmolarity),
and bacterial count normally be very different from that of the blood? - CORRECT
ANSWER- ✔✔in the stomach
All of the muscle cells in the body are at the annual muscle convention. Deciding to write
bylaws, they first list the criteria that distinguish muscles from other tissues. The committee
requires 3 weeks to get the list together—and the list includes this: "All muscle cells are -
CORRECT ANSWER- ✔✔able to develop force
Hi, I'm an important piece of your body. Neurons from the brain stem activate me, and I'm at
work every minute of the day and night. In fact, if I'm not at work, it's quickly fatal. Although
I can be controlled voluntarily at times, such as when I am talking or singing, all the rest of
the time I work involuntarily. I'm composed largely of - CORRECT ANSWER-
✔✔diaphragm ; skeletal muscle
, In the 4th quarter of a cold November football game, an underdressed spectator realizes that
his core body temperature has fallen from 98.6ºF to 94.4ºF. In terms of temperature
regulation, this temperature change represents - CORRECT ANSWER- ✔✔error signal
Which of the following best describes the physiological role of appetite? - CORRECT
ANSWER- ✔✔it is an effector response for the regulation of body weight
Question: What will happen if the "signal" to the effectors (the hormone insulin, in the
diagram above) is absent or ineffective? - CORRECT ANSWER- ✔✔rising blood glucose
levels will not trigger a negative feedback compensation
After a carbohydrate-heavy lunch, a college senior's blood glucose rises from 76 to 135
mg/dl. Which cells detect this change and initiate an appropriate response? - CORRECT
ANSWER- ✔✔β-cells of the pancreas
What difficulties with blood glucose regulation would a person with type 1 diabetes
encounter? - CORRECT ANSWER- ✔✔anticipating the effects of stress on blood glucose
levels
properly estimating the amount of short-acting and long-actin insulin
adjusting insulin requirements when exercising
managing blood glucose levels during sleep
matching insulin needs to the glucose-elevating effects of a specific food or meal
Drugs—not insulin—are used initially to treat type 2 diabetes mellitus. What would be some
useful actions of these drugs? - CORRECT ANSWER- ✔✔increased responsiveness
("sensitivity") of cells to the effects of insulin
increased release of insulin from the pancreatic islets
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