BMSC 207 PRACTICE QUESTIONS & ANSWERS
Which of the following is considered the "internal environment" of the body?
a. External environment
b. Extracellular fluid (ECF)
c. Intracellular fluid (ICF) - Answers -b. Extracellular fluid (ECF)
For any variable in the body that remains constant, when there is an increase in this
variable there must be an equal removal. This is defined as:
a. Emergent properties
b. Homeostasis
c. Mass balance
d. Physiology - Answers -c. Mass balance
An increase in core body temperature results in increased blood flow to the skin
throughout the body so that heat can be released to the environment and bring core
body temperature down. This is an example of which control system?
a. Local control
b. Negative feedback control
c. Positive feedback control
d. Feedforward control
e. None of the above - Answers -b. Negative feedback control
All homeostatic set points for variables in the body remain constant
True or False? - Answers -False
What is the most abundant lipid in the cell membrane
a. Glycolipid
b. Phospholipid
c. Sphingolipid
d. Cholesterol
e. None of the above - Answers -b. Phospholipid
How much water is contained within the body of a healthy 100kg male?
a. 60L
b. 42L
c. 28L
d. 14 L - Answers -a. 60L
- If you're a 70kg male you would have 42L
An increase in this type of tissue why, on average, females tend to have slightly lower
body water content when compared to males
a. Skeletal muscle
, b. Adipose
c. Bone
d. Connective tissue - Answers -b. Adipose
If a cell swells in response to being exposed to a solution, the solution is said to be
a. Hyperosmotic
b. Hypoosmotic
c. Hypertonic
d. Hypotonic - Answers -d. Hypotonic
Which of the following would increase the rate of diffusion?
a. Lower temperature
b. Thicker membrane
c. Smaller concentration gradient
d. Larger membrane SA - Answers -d. Larger membrane SA
Carrier proteins always require an external energy source such as ATP
True or False - Answers -False
Aquaporins are an example of what type of channel
a. Mechanically gated
b. Ligand gated
c. Voltage gated
d. Leak - Answers -d. Leak
If a concentration gradient for an ION exists between the ICF and ECF that ion will
move down its concentration gradient until equilibrium is reached
True or False - Answers -False
Saturation refers to...
a. A ground carrier protein operating at their maximum rate
b. When two molecules attempt to use the same carrier
c. Whether a carrier protein has the ability to transport only one molecule or a group of
closely related molecules
d. None of the above - Answers -a. A ground carrier protein operating at their maximum
rate
Which of the following statements about the resting membrane potential is TRUE?
a. It is equal 0mV
b. The inside of the membrane is positively charged compared to the outside
c. It results, in part, from the permeability of the cell membrane to K+
d. It is due in part to the presence of the extracellular proteins
e. None of the above - Answers -c. It results, in part, from the permeability of the cell
membrane to K+
Which of the following is considered the "internal environment" of the body?
a. External environment
b. Extracellular fluid (ECF)
c. Intracellular fluid (ICF) - Answers -b. Extracellular fluid (ECF)
For any variable in the body that remains constant, when there is an increase in this
variable there must be an equal removal. This is defined as:
a. Emergent properties
b. Homeostasis
c. Mass balance
d. Physiology - Answers -c. Mass balance
An increase in core body temperature results in increased blood flow to the skin
throughout the body so that heat can be released to the environment and bring core
body temperature down. This is an example of which control system?
a. Local control
b. Negative feedback control
c. Positive feedback control
d. Feedforward control
e. None of the above - Answers -b. Negative feedback control
All homeostatic set points for variables in the body remain constant
True or False? - Answers -False
What is the most abundant lipid in the cell membrane
a. Glycolipid
b. Phospholipid
c. Sphingolipid
d. Cholesterol
e. None of the above - Answers -b. Phospholipid
How much water is contained within the body of a healthy 100kg male?
a. 60L
b. 42L
c. 28L
d. 14 L - Answers -a. 60L
- If you're a 70kg male you would have 42L
An increase in this type of tissue why, on average, females tend to have slightly lower
body water content when compared to males
a. Skeletal muscle
, b. Adipose
c. Bone
d. Connective tissue - Answers -b. Adipose
If a cell swells in response to being exposed to a solution, the solution is said to be
a. Hyperosmotic
b. Hypoosmotic
c. Hypertonic
d. Hypotonic - Answers -d. Hypotonic
Which of the following would increase the rate of diffusion?
a. Lower temperature
b. Thicker membrane
c. Smaller concentration gradient
d. Larger membrane SA - Answers -d. Larger membrane SA
Carrier proteins always require an external energy source such as ATP
True or False - Answers -False
Aquaporins are an example of what type of channel
a. Mechanically gated
b. Ligand gated
c. Voltage gated
d. Leak - Answers -d. Leak
If a concentration gradient for an ION exists between the ICF and ECF that ion will
move down its concentration gradient until equilibrium is reached
True or False - Answers -False
Saturation refers to...
a. A ground carrier protein operating at their maximum rate
b. When two molecules attempt to use the same carrier
c. Whether a carrier protein has the ability to transport only one molecule or a group of
closely related molecules
d. None of the above - Answers -a. A ground carrier protein operating at their maximum
rate
Which of the following statements about the resting membrane potential is TRUE?
a. It is equal 0mV
b. The inside of the membrane is positively charged compared to the outside
c. It results, in part, from the permeability of the cell membrane to K+
d. It is due in part to the presence of the extracellular proteins
e. None of the above - Answers -c. It results, in part, from the permeability of the cell
membrane to K+
