PHYS 261: Human Physiology Midterm Exam | Actual Questions and Answers Latest
Updated (Graded A+)-West Coast University
Due Jul 11 at 11:59pm
Points 76
Questions 76
Available after Jul 6 at 12am
Time Limit 120 Minutes
Instructions
You will have 2 hours to complete this 76-question exam.
Attempt History
Attempt Time Score
LATEST Attempt 1 79 minutes 68 out of 76
Submitted Jul 11 at 9:52pm
Question 1
pts
Which system(s) does NOT exchange material with the internal and external environments?
urinary system
respiratory system
Correct!
circulatory system
digestive system
All of the above.
Question 2
pts
Which are used to keep our systems at or near their setpoints?
positive feedback loops
feedforward control loop
open control loops
response loops
Correct!
negative feedback loops
Question 3
pts
Today is your first exam, and as a result, your Blood Pressure is way above the normal range (normal BP = 110/70, your blood pressure = 130/90). Baroreceptors (they detect
changes in blood pressure) located in your Aortic Arch and Carotid Sinuses detects the change in your BP and sends this information to the Medulla located in your brain. The
Medulla will compare the information it just received with the set point stored in it and realize that your BP has increased. The Medulla will cause your arteries to dilate, your heart rate
to decrease and finally your urine production to increase.
Medulla would be classified as the .
Correct!
Control Center / Integrating Center
Setpoint
Sensor
Effector
1/17
, Variable
Question 4
pts
The fluid substance of blood is called
cytoplasm.
endothelium.
peroxide.
Correct!
plasma.
interstitial fluid.
Question 5
pts
Nucleoli function in the production of
proteins.
peroxisomes.
DNA that controls all cell functions.
secretory vesicles.
Correct!
RNA for ribosomes.
Question 6
pts
Which is an example of a membranous organelle?
cilia
centriole
Correct!
lysosome
ribosome
cytoskeleton
Question 7
pts
If an animal cell lacked centrioles, it would not be able to
produce DNA.
metabolize sugars.
maintain its balance.
synthesize proteins.
Correct!
undergo nuclear division.
Question 8
pts
If a solution has a pH that is less than 7, it is
Correct!
acidic.
a salt.
alkaline.
a buffer.
neutral.
Question 9
pts
Which of the following is most acidic?
2/17
, Correct Answer
stomach secretions, pH = 1
urine, pH = 6
lemon juice, pH = 2
white wine, pH = 3
You Answered
tomato juice, pH = 4
Question 10
pts
Ions with a negative charge are called
Correct!
anions.
electrons.
cations.
tissues.
neurons.
Question 11
pts
Nucleotides perform which of the following function(s)?
They form structural elements in the cell membrane.
Correct!
They provide energy and are part of genetic material.
They are the building blocks of proteins like cell receptors.
They store glucose as fat.
They are the starting material for steroid hormones.
Question 12
pts
Cytosine would pair with which of the follwoing?
Correct!
guanine.
thymine.
cytosine.
adenine.
uracil.
Question 13
pts
During intense exercise our muscles produce lactate and hydrogen ions, as a result ?
pH would increase
pH would become alkaline
pH would go from 7.5 to 9.5
pH would decrease
pH would become acidic
Correct!
pH would decrease hence become acidic.
Question 14
pts
A elderly female has kidney disorder, and as a result produces excessive amounts of acids. Which of the follwoing will bring her pH back towards
normal?
Correct!
3/17
Updated (Graded A+)-West Coast University
Due Jul 11 at 11:59pm
Points 76
Questions 76
Available after Jul 6 at 12am
Time Limit 120 Minutes
Instructions
You will have 2 hours to complete this 76-question exam.
Attempt History
Attempt Time Score
LATEST Attempt 1 79 minutes 68 out of 76
Submitted Jul 11 at 9:52pm
Question 1
pts
Which system(s) does NOT exchange material with the internal and external environments?
urinary system
respiratory system
Correct!
circulatory system
digestive system
All of the above.
Question 2
pts
Which are used to keep our systems at or near their setpoints?
positive feedback loops
feedforward control loop
open control loops
response loops
Correct!
negative feedback loops
Question 3
pts
Today is your first exam, and as a result, your Blood Pressure is way above the normal range (normal BP = 110/70, your blood pressure = 130/90). Baroreceptors (they detect
changes in blood pressure) located in your Aortic Arch and Carotid Sinuses detects the change in your BP and sends this information to the Medulla located in your brain. The
Medulla will compare the information it just received with the set point stored in it and realize that your BP has increased. The Medulla will cause your arteries to dilate, your heart rate
to decrease and finally your urine production to increase.
Medulla would be classified as the .
Correct!
Control Center / Integrating Center
Setpoint
Sensor
Effector
1/17
, Variable
Question 4
pts
The fluid substance of blood is called
cytoplasm.
endothelium.
peroxide.
Correct!
plasma.
interstitial fluid.
Question 5
pts
Nucleoli function in the production of
proteins.
peroxisomes.
DNA that controls all cell functions.
secretory vesicles.
Correct!
RNA for ribosomes.
Question 6
pts
Which is an example of a membranous organelle?
cilia
centriole
Correct!
lysosome
ribosome
cytoskeleton
Question 7
pts
If an animal cell lacked centrioles, it would not be able to
produce DNA.
metabolize sugars.
maintain its balance.
synthesize proteins.
Correct!
undergo nuclear division.
Question 8
pts
If a solution has a pH that is less than 7, it is
Correct!
acidic.
a salt.
alkaline.
a buffer.
neutral.
Question 9
pts
Which of the following is most acidic?
2/17
, Correct Answer
stomach secretions, pH = 1
urine, pH = 6
lemon juice, pH = 2
white wine, pH = 3
You Answered
tomato juice, pH = 4
Question 10
pts
Ions with a negative charge are called
Correct!
anions.
electrons.
cations.
tissues.
neurons.
Question 11
pts
Nucleotides perform which of the following function(s)?
They form structural elements in the cell membrane.
Correct!
They provide energy and are part of genetic material.
They are the building blocks of proteins like cell receptors.
They store glucose as fat.
They are the starting material for steroid hormones.
Question 12
pts
Cytosine would pair with which of the follwoing?
Correct!
guanine.
thymine.
cytosine.
adenine.
uracil.
Question 13
pts
During intense exercise our muscles produce lactate and hydrogen ions, as a result ?
pH would increase
pH would become alkaline
pH would go from 7.5 to 9.5
pH would decrease
pH would become acidic
Correct!
pH would decrease hence become acidic.
Question 14
pts
A elderly female has kidney disorder, and as a result produces excessive amounts of acids. Which of the follwoing will bring her pH back towards
normal?
Correct!
3/17
