WCU PHYS 261 MID-TERM REVIEW
In which type of chemical bonding are the electrons most equally shared between
atoms? - Answers -Covalent bonds
Which statement describes the relationship between pH and hydrogen ions? - Answers
-pH and hydrogen ions are inversely related
Only free H+ contributes to the hydrogen ion concentration. - Answers -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? - Answers -Negative feedback
Which is a way to recognize a carbohydrate by looking at its name? - Answers -It ends
in -ose
RNA contains the five-carbon sugar - Answers -Ribose
Which term best describes the part of a control system that receives information about a
homeostatically regulated variable and initiates an appropriate response? - Answers -
Integrating Center
Sodium ions (Na+) and potassium ions (K+) are similar because they both have: -
Answers -Lost a negative electron
Homeostasis is the ability of the body to - Answers -Quickly restore changed
conditions to normal
Nucleic acids are polymers of units called - Answers -Nucleotides
An outer membrane containing pores surrounds which organelle(s)? - Answers -
Nucleus
Glycogen is an example of a - Answers -Carbohydrate
Two methods of protein activation include ________ and ________. - Answers -
Proteolytic, cofactor binding
Each of the following is a function of proteins EXCEPT - Answers -Storage of genetic
material
Which system(s) does NOT exchange material with the internal and external
environments? - Answers -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 - Answers -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? - Answers -The
proteins actin and myosin
The center of an atom is called the - Answers -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?
- Answers -Response
Nucleotides perform which function(s)? - Answers -They transfer energy and are part
of genetic material
If a solution has a pH that is less than 7 it is - Answers -Acidic
A protein that no longer functions because its shape has changed (for example as a
result of heating) has been __________. - Answers -Denatured
Ions with a positive charge are called - Answers -Cations
This subatomic particle has a negative charge. - Answers -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? - Answers -Circulatory, musculoskeletal, nervous,
respiratory
An energy-transferring compound in cells is a nucleotide known as - Answers -
adenosine triphosphate
True or false: A blood pH of less than 7.00 and greater than 7.70 is incompatible with
life. - Answers -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? - Answers -Positive feedback
, The symbol Ca2+ means calcium has - Answers -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? - Answers -Tertiary
A nucleotide is made up of a - Answers -five-carbon sugar, a nitrogenous base, and a
phosphate group.
Cholesterol is a - Answers -Precursor to steroid hormones and component of animal
cell membranes.
The alpha helix and B sheets are examples of the _____structure of a protein -
Answers -secondary
An atom that gains or loses electrons becomes - Answers -an ion of the same element
Which of the following is a good example of quaternary protein structure? - Answers -
Four globular subunits join together to form functional hemoglobin
If a polypeptide contains 10 polypeptide bonds how many amino acid does it contain? -
Answers -11
Potassium channels are usually made up of several subunits. This is an example of
which level of protein structure? - Answers -Quaternary
Ions with a negative charge are called - Answers -anions
HCl (hydrochloric acid) is an acid because - Answers -in solution it donates its H+.
The sequence of amino acids in the chain is an example of which level of protein
structure? - Answers -primary
DNA contains the five-carbon sugar - Answers -deoxyribose.
A positively-charged ion is called a(n) - Answers -cation.
Which are used to keep our systems at or near their setpoints? - Answers -negative
feedback loops
Which of the following is a definition for homeostasis? - Answers -The ability of living
systems to maintain a relatively constant internal environment
Interactions between different globular or fibrous polypeptide chains result in which type
of structure? - Answers -quaternary
In which type of chemical bonding are the electrons most equally shared between
atoms? - Answers -Covalent bonds
Which statement describes the relationship between pH and hydrogen ions? - Answers
-pH and hydrogen ions are inversely related
Only free H+ contributes to the hydrogen ion concentration. - Answers -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? - Answers -Negative feedback
Which is a way to recognize a carbohydrate by looking at its name? - Answers -It ends
in -ose
RNA contains the five-carbon sugar - Answers -Ribose
Which term best describes the part of a control system that receives information about a
homeostatically regulated variable and initiates an appropriate response? - Answers -
Integrating Center
Sodium ions (Na+) and potassium ions (K+) are similar because they both have: -
Answers -Lost a negative electron
Homeostasis is the ability of the body to - Answers -Quickly restore changed
conditions to normal
Nucleic acids are polymers of units called - Answers -Nucleotides
An outer membrane containing pores surrounds which organelle(s)? - Answers -
Nucleus
Glycogen is an example of a - Answers -Carbohydrate
Two methods of protein activation include ________ and ________. - Answers -
Proteolytic, cofactor binding
Each of the following is a function of proteins EXCEPT - Answers -Storage of genetic
material
Which system(s) does NOT exchange material with the internal and external
environments? - Answers -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 - Answers -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? - Answers -The
proteins actin and myosin
The center of an atom is called the - Answers -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?
- Answers -Response
Nucleotides perform which function(s)? - Answers -They transfer energy and are part
of genetic material
If a solution has a pH that is less than 7 it is - Answers -Acidic
A protein that no longer functions because its shape has changed (for example as a
result of heating) has been __________. - Answers -Denatured
Ions with a positive charge are called - Answers -Cations
This subatomic particle has a negative charge. - Answers -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? - Answers -Circulatory, musculoskeletal, nervous,
respiratory
An energy-transferring compound in cells is a nucleotide known as - Answers -
adenosine triphosphate
True or false: A blood pH of less than 7.00 and greater than 7.70 is incompatible with
life. - Answers -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? - Answers -Positive feedback
, The symbol Ca2+ means calcium has - Answers -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? - Answers -Tertiary
A nucleotide is made up of a - Answers -five-carbon sugar, a nitrogenous base, and a
phosphate group.
Cholesterol is a - Answers -Precursor to steroid hormones and component of animal
cell membranes.
The alpha helix and B sheets are examples of the _____structure of a protein -
Answers -secondary
An atom that gains or loses electrons becomes - Answers -an ion of the same element
Which of the following is a good example of quaternary protein structure? - Answers -
Four globular subunits join together to form functional hemoglobin
If a polypeptide contains 10 polypeptide bonds how many amino acid does it contain? -
Answers -11
Potassium channels are usually made up of several subunits. This is an example of
which level of protein structure? - Answers -Quaternary
Ions with a negative charge are called - Answers -anions
HCl (hydrochloric acid) is an acid because - Answers -in solution it donates its H+.
The sequence of amino acids in the chain is an example of which level of protein
structure? - Answers -primary
DNA contains the five-carbon sugar - Answers -deoxyribose.
A positively-charged ion is called a(n) - Answers -cation.
Which are used to keep our systems at or near their setpoints? - Answers -negative
feedback loops
Which of the following is a definition for homeostasis? - Answers -The ability of living
systems to maintain a relatively constant internal environment
Interactions between different globular or fibrous polypeptide chains result in which type
of structure? - Answers -quaternary
