WCU PHYS 261 Mid-term review
(updated) questions well answered
In which type of chemical bonding are the electrons most equally shared between atoms? -
correct answer ✔✔ Covalent bonds
Which statement describes the relationship between pH and hydrogen ions? - correct answer
✔✔ pH and hydrogen ions are inversely related
Only free H+ contributes to the hydrogen ion concentration. - correct answer ✔✔ True
After a meal, blood glucose increases. Increased blood glucose is the stimulus for a reflex
pathway that releases insulin into the blood and the response is decreased blood glucose. This
is an example of which of the following? - correct answer ✔✔ Negative feedback
Which is a way to recognize a carbohydrate by looking at its name? - correct answer ✔✔ It ends
in -ose
RNA contains the five-carbon sugar - correct answer ✔✔ Ribose
Which term best describes the part of a control system that receives information about a
homeostatically regulated variable and initiates an appropriate response? - correct answer ✔✔
Integrating Center
Sodium ions (Na+) and potassium ions (K+) are similar because they both have: - correct answer
✔✔ Lost a negative electron
,Homeostasis is the ability of the body to - correct answer ✔✔ Quickly restore changed
conditions to normal
Nucleic acids are polymers of units called - correct answer ✔✔ Nucleotides
An outer membrane containing pores surrounds which organelle(s)? - correct answer ✔✔
Nucleus
Glycogen is an example of a - correct answer ✔✔ Carbohydrate
Two methods of protein activation include ________ and ________. - correct answer ✔✔
Proteolytic, cofactor binding
Each of the following is a function of proteins EXCEPT - correct answer ✔✔ Storage of genetic
material
Which system(s) does NOT exchange material with the internal and external environments? -
correct answer ✔✔ Circulatory system
The following is a list of several levels of organization that make up the human body.
1. Tissue
2. Cell
3. Organ
4. Molecule
5. Organism
6. organ system
The correct order from the smallest to the largest is - correct answer ✔✔ 4, 2, 1, 3, 6, 5
,During intense exercise our muscles produce lactate and hydrogen ions. Which molecules would
be affected by the accumulation of hydrogen ions? - correct answer ✔✔ The proteins actin and
myosin
The center of an atom is called the - correct answer ✔✔ Nucleus
You go outside on a very cold day and you start to shiver because you do not have on the proper
clothing. The act of shivering would represent what step in a response loop? - correct answer
✔✔ Response
Nucleotides perform which function(s)? - correct answer ✔✔ They transfer energy and are part
of genetic material
If a solution has a pH that is less than 7 it is - correct answer ✔✔ Acidic
A protein that no longer functions because its shape has changed (for example as a result of
heating) has been __________. - correct answer ✔✔ Denatured
Ions with a positive charge are called - correct answer ✔✔ Cations
This subatomic particle has a negative charge. - correct answer ✔✔ electron.
Which of the systems listed in Table 1.1 plays a role in increasing oxygen delivery to muscles as
you are running a race? - correct answer ✔✔ Circulatory, musculoskeletal, nervous, respiratory
An energy-transferring compound in cells is a nucleotide known as - correct answer ✔✔
adenosine triphosphate
, True or false: A blood pH of less than 7.00 and greater than 7.70 is incompatible with life. -
correct answer ✔✔ True
Oxytocin is a hormone released in response to cervical dilation. This causes more uterine
contractions that will further dilate the cervix. Which type of feedback does oxytocin trigger? -
correct answer ✔✔ Positive feedback
The symbol Ca2+ means calcium has - correct answer ✔✔ lost two electrons.
Hemoglobin molecules are made from four globular protein subunits. The three-dimensional
shape of these globular subunits is an example of which level of protein structure? - correct
answer ✔✔ Tertiary
A nucleotide is made up of a - correct answer ✔✔ five-carbon sugar, a nitrogenous base, and a
phosphate group.
Cholesterol is a - correct answer ✔✔ Precursor to steroid hormones and component of animal
cell membranes.
The alpha helix and B sheets are examples of the _____structure of a protein - correct answer
✔✔ secondary
An atom that gains or loses electrons becomes - correct answer ✔✔ an ion of the same element
Which of the following is a good example of quaternary protein structure? - correct answer ✔✔
Four globular subunits join together to form functional hemoglobin
If a polypeptide contains 10 polypeptide bonds how many amino acid does it contain? - correct
answer ✔✔ 11
(updated) questions well answered
In which type of chemical bonding are the electrons most equally shared between atoms? -
correct answer ✔✔ Covalent bonds
Which statement describes the relationship between pH and hydrogen ions? - correct answer
✔✔ pH and hydrogen ions are inversely related
Only free H+ contributes to the hydrogen ion concentration. - correct answer ✔✔ True
After a meal, blood glucose increases. Increased blood glucose is the stimulus for a reflex
pathway that releases insulin into the blood and the response is decreased blood glucose. This
is an example of which of the following? - correct answer ✔✔ Negative feedback
Which is a way to recognize a carbohydrate by looking at its name? - correct answer ✔✔ It ends
in -ose
RNA contains the five-carbon sugar - correct answer ✔✔ Ribose
Which term best describes the part of a control system that receives information about a
homeostatically regulated variable and initiates an appropriate response? - correct answer ✔✔
Integrating Center
Sodium ions (Na+) and potassium ions (K+) are similar because they both have: - correct answer
✔✔ Lost a negative electron
,Homeostasis is the ability of the body to - correct answer ✔✔ Quickly restore changed
conditions to normal
Nucleic acids are polymers of units called - correct answer ✔✔ Nucleotides
An outer membrane containing pores surrounds which organelle(s)? - correct answer ✔✔
Nucleus
Glycogen is an example of a - correct answer ✔✔ Carbohydrate
Two methods of protein activation include ________ and ________. - correct answer ✔✔
Proteolytic, cofactor binding
Each of the following is a function of proteins EXCEPT - correct answer ✔✔ Storage of genetic
material
Which system(s) does NOT exchange material with the internal and external environments? -
correct answer ✔✔ Circulatory system
The following is a list of several levels of organization that make up the human body.
1. Tissue
2. Cell
3. Organ
4. Molecule
5. Organism
6. organ system
The correct order from the smallest to the largest is - correct answer ✔✔ 4, 2, 1, 3, 6, 5
,During intense exercise our muscles produce lactate and hydrogen ions. Which molecules would
be affected by the accumulation of hydrogen ions? - correct answer ✔✔ The proteins actin and
myosin
The center of an atom is called the - correct answer ✔✔ Nucleus
You go outside on a very cold day and you start to shiver because you do not have on the proper
clothing. The act of shivering would represent what step in a response loop? - correct answer
✔✔ Response
Nucleotides perform which function(s)? - correct answer ✔✔ They transfer energy and are part
of genetic material
If a solution has a pH that is less than 7 it is - correct answer ✔✔ Acidic
A protein that no longer functions because its shape has changed (for example as a result of
heating) has been __________. - correct answer ✔✔ Denatured
Ions with a positive charge are called - correct answer ✔✔ Cations
This subatomic particle has a negative charge. - correct answer ✔✔ electron.
Which of the systems listed in Table 1.1 plays a role in increasing oxygen delivery to muscles as
you are running a race? - correct answer ✔✔ Circulatory, musculoskeletal, nervous, respiratory
An energy-transferring compound in cells is a nucleotide known as - correct answer ✔✔
adenosine triphosphate
, True or false: A blood pH of less than 7.00 and greater than 7.70 is incompatible with life. -
correct answer ✔✔ True
Oxytocin is a hormone released in response to cervical dilation. This causes more uterine
contractions that will further dilate the cervix. Which type of feedback does oxytocin trigger? -
correct answer ✔✔ Positive feedback
The symbol Ca2+ means calcium has - correct answer ✔✔ lost two electrons.
Hemoglobin molecules are made from four globular protein subunits. The three-dimensional
shape of these globular subunits is an example of which level of protein structure? - correct
answer ✔✔ Tertiary
A nucleotide is made up of a - correct answer ✔✔ five-carbon sugar, a nitrogenous base, and a
phosphate group.
Cholesterol is a - correct answer ✔✔ Precursor to steroid hormones and component of animal
cell membranes.
The alpha helix and B sheets are examples of the _____structure of a protein - correct answer
✔✔ secondary
An atom that gains or loses electrons becomes - correct answer ✔✔ an ion of the same element
Which of the following is a good example of quaternary protein structure? - correct answer ✔✔
Four globular subunits join together to form functional hemoglobin
If a polypeptide contains 10 polypeptide bonds how many amino acid does it contain? - correct
answer ✔✔ 11
