Practice question deck

Question 1

which of the following could be described by the figure on the right?
A. Endothermy
B. Ectothermy
C. Hormone Resistance
D. Heart Rate in early Exercise

Answer 1

B & D

Question 2

When placental mammals are ready to give birth, the placenta of the fetus starts to
produce oxytocin which causes the mothers uterus to begin to contract. These contractions
in-turn produce prostaglandins which leads to more oxytocin production. Eventually, this
leads to birth of the offspring. Which of the following types of feedback does this
exemplify?
A. Positive Feedback
B. Negative Feedback
C. Feed Forward
D. None of the above

Answer 2

A. Positive feedback

Question 3

Steroid molecules, such as cholesterol and vitamin D, pass easily across the membrane.
These are fairly large molecules. The reason they can pass easily across the membrane is
because they (mark all that apply):
A. They are lipids
B. Are polar molecules
C. Are hydrophobic
D. Contain many charged sections

Answer 3

A & C

Question 4

Initially, if a particularly smelly odorant (maybe Axe Body Spray™) were sprayed into the
corner of this room, only those near it would be able to notice. Eventually, the entire room
would smell like the Sophomore boys locker room. For sake of this argument, lets say that
no one enters or leaves the room and all fans/air condition are turned off. Which of the
following explains this?
a. Osmosis
b. Axe body spray must be an ionic compound
c. Simple Diffusion

Answer 4

C. Simple Diffusion

Question 5

Na+-K+ ATPase transport ions across the membrane via the mechanism of

Answer 5

Primary Active transport

Question 6

what type of diffusion is the calcium pump?
a. Primary Active diffusion
b. bulk diffusion
c. secondary active diffusion
d. Passive diffusion

Answer 6

Primary Active diffusion

Question 7

what type of diffusion is a Proton Pump?

a. Primary Active diffusion
b. bulk diffusion
c. secondary active diffusion
d. Passive diffusion

Answer 7

Primary Active diffusion

Question 8

What is false about facilitated diffusion
a. They are always selective for specific ions
b. they can be non selective
c. movement of molecules is with the concentration gradient
d. they require transmembrane proteins

Answer 8

a. they are always selective for specific ions

Question 9

There are positive and negative feedback loops in animal physiology. Based on this classification, which of the following examples is different an example of a positive feedback loop?

a. Parturition (birth): oxytocin secretion and contraction of uterine smooth muscle

b. Maintaining internal body temperature

c. Inactivation of voltage-gated Na+ channels during action potential

d. drinking when thirsty

e. Sensory receptor adaptation

Answer 9

a. Parturition (birth): oxytocin secretion and contraction of uterine smooth muscle

Question 10

_____ is an example of a positive feedback loop
a. vomitting
b. maintaining internal body temp
c. piasma glucose level
d. eatting when hungry

Answer 10

a. vomitting

Question 11

when an ion crosses the membrane using a protein to accomplish this it is using
a. passive diffusion
b. facilitated diffusion
c. active transport

Answer 11

b. facilitated diffusion

Question 12

Secretory vesicles that are produced by the ER- golgi network may be released from the cell using the process of
a. exocytosis
b. gap junction
c. phagocytosis
d. saltatory conduction
e. membrane transport

Answer 12

a. exocytosis

Question 13

which of the following is true of epithelial cells?
a. many molecules pass through the epithelial cells to enter and leave the body

b. they are connected together with leaky junctions

c. they are replete with mitochondria

d. they are the site of active transport

e. they can be found in organs such as the pancreas and liver

f. they are not nucleated

g. within one tissue type there is a high level of diversity of cell type

Answer 13

a, b, c, d, g

Question 14

which of the following is false concerning bulk transport?
a. it only move molecules with the concentration gradient
b. it can move molecules into or out of the cell
c. it requires atp
d. it can be done intracellularly

Answer 14

a. it can only move molecules with the concentration gradient

Question 15

Mechanically grated channels
a. open in response to pressure
b, require a ligand
c. require atp
d. are present in all sensory neurons

Answer 15

a. open in response to pressure

Question 16

which of the following statements is true about phenotype?
a. altering phenotype allows an organism to change its physiological response
b. after initial development period phenotype of an organism is static
c. phenotype is affected by organization at the biochemical level
d. genotype may influence phenotype but phenotype never affects genotype

Answer 16

A. altering phenotype allows an organism to change its physiological response

Question 17

acclimatization is a term referring to
a. reversible changes in phenotype due to natural environmental variation
b. irreversible changes in phenotype due to natural environmental variation
c. irreversible changed in phenotype due to controlled experimental change
d. irreversible changes in phenotype due to controlled environmental changed

Answer 17

reversible changes in phenotype due to natural environmental changes

Question 18

The family of GLUT transporters are examples of molecules that use which type of transports
a. facilitated diffusion
b. active transport
c. bulk transport
d. diffusion

Answer 18

a. facilitated diffusion

Question 19

which of the following statements is true concerning secondary active transports
a. Electrogenic carriers generate a charge difference across the membrane
b. A symporter can bind only one particle
c. an exchanger/antiporter will always be electroneutral
d. the direction in which charger particles are transported across the membrane does not affect the electrical gradient

Answer 19

a. Electrogenic carriers generate a charge difference across the membrane

Question 20

Acetyl-CoA can be produced using which of the following substrates?
a. Lactic acid
b. pyruvate
c. carbohydrates
d. fatty acids
e. ketone bodies
f. proteins

Answer 20

Lactic acid, pyruvate, fatty acids, ketone bodies, proteins

Question 21

which of the following is true of fatty acid oxidation?\
a. its the breakdown of fatty acids
b. results in the production of usually many Acetyl- CoA
c. Directly produces atp

Answer 21

a. its the breakdown of fatty acids
b. results in the production of usually many Acetyl- CoA

Question 22

Parietal cells accumulate very large concentrations of protons (H+) in the stomach using proton pumps. Which of the following is probably true concerning these pumps?
a. they work against the electrochemical gradient
b. they work through passive diffusion
c. they work through facilitated diffusion
d. the require atp

Answer 22

a. they work against the electrochemical gradient of H+, d. they require atp

Question 23

which of the following orgenelles are involved in bulk transport
a. cell membrane
b. rough ER
c. Lysosomes
d. Storage Vesicles

Answer 23

a. Cell membrane

Question 24

If a cell were put into an isosmotic solution where all ions were in equal same concentration and electrochemical gradient inside and outside the cell except for proteins which were in the cell, but not in the solution. What would you expect to happen to the cell?
a. water would enter the cell
b. water would leave the cell
c. protein would leave the cell
d. ions would enter the cell
e. ions would leave the cell

Answer 24

a. water would enter the cell

Question 25

Which of the following types of transport are most responsible for the maintenance of the resting membrane potential at -70mV once it gets there. (This is not asking about how the resting membrane potential reaches -70mV)
a. facilitated diffusion
b. active transport
c. non facilitated diffusion
d. bulk transport

Answer 25

a. facilitated diffusion

Question 26

each of the following molecules require the use of specific proteins that allow for movement across the membrane except
a. steroid hormones
b. water
c. aminoacids
d. carbs
e. glycoproteins

Answer 26

a. steroid hormones

Question 27

how is the concentration gradient for oxygen maintained in living cells
a. consumption of oxygen in the electron transport chain and glycolysis
b. active transport of oxygen
c. facilitated diffusion of oxygen
d. diffusion of oxygen into the organism from the environment

Answer 27

a. consumption of oxygen in the electron transport chain and glycolysis

Question 28

What would happen to the carbon dioxide concentration within the blood stream if the environmental concentration decreased drastically? For example, the normal concentration is around 21% and that in your blood is usually much higher than that. What would happen if the environmental concentration were to decrease to 15%
a. CO2 might leave your blood more quickly
b. oxygen would leave your bloodstream more quickly
c. co2 would enter blood stream more quickly
d. you might suffer CO2 poisioning

Answer 28

a. CO2 might leave your blood more quickly

Question 29

which of the following resting membrane potentials would be most likely if leaky proteins were never transcribed?
a. -75
b. -70
c. -55
d. 0
e. 30

Answer 29

a. -75mV

Question 30

which of the following molecules would you expect to be able to enter the cell without the use of bulk transport or an integral protein?
a. HDL cholesterol
b. The amino acid luecne
c. Mg Ion
d. water

Answer 30

A. HDL Cholesterol