Test 1 Review Flashcards
1
Q
- Which of the transport mechanisms require energy other than kinetic energy?
A
active transport
2
Q
- Which ion is most concentrated in the extracellular environment?
A
sodium
3
Q
- Which organelle is directly associated with the synthesis of proteins for secretion?
A
- Rough ER
4
Q
- Pits coated with what are often associated with endocytosis?
A
- Clathrin
5
Q
- Sodium potassium pump is an example of which of the following kinds of transport?
A
- primary active transport
6
Q
- Sodium glucose pump is an example of which of the following kinds of transport?
A
- secondary active transport
7
Q
- Which of the following would have to be a transmembrane protein?
a. A receptor protein
b. A protein binding to the cytoskeleton
c. A channel protein
d. A phosphorylase
A
- channel protein
8
Q
- Sodium calcium pump is an example of which of the following kinds of transport?
A
- secondary active transport
9
Q
- Glucose transporters (GLUT transporters) employ which of the following kinds of
transport?
A
- facilitated diffusion
10
Q
- Which cation is most abundant in extracellular fluid?
A
- Sodium
11
Q
- Which organelle/s is/are associated with intracellular trafficking?
A
- the ER and Golgi Apparatus
12
Q
- Which organelle/s is/are associated with the most ATP production?
A
- mitochondria
13
Q
- Which anion is most abundant in extracellular fluid?
A
- Chloride
14
Q
- Which cation is most abundant in intracellular fluid?
A
- Potassium
15
Q
- Which type of neurons would transmit an action potential the fastest?
A
- Large diameter, myelinated
16
Q
- saltatory conduction is characteristic of which part of a typical diameter?
A
- axon
17
Q
- A selectivity filter with carbonyl oxygens is associated with which of the following kinds of ion channels?
A
- potassium
18
Q
- The resting potential for a typical neuron, such as a motor neuron, is best represented by which of the following potentials?
A
- ‐90mV
19
Q
- Which of the following terms refers to a chain of sarcomeres?
A
- Myofibril
20
Q
- Which of the following sarcomere bands does not undergo a length change during the contraction of a skeletal muscle?
A
- A band
21
Q
- Dihydropyridine (DHP) channels are part of which of the following structures?
A
- T‐Tubules
22
Q
- Ryanodine‐sensitive calcium ion release channels are part of which of the following structures?
A
- Sarcoplasmic reticulum
23
Q
- Which of the following events occurs first during the transmission of a signal from an alpha motor neuron to a skeletal muscle fiber?
A
- Calcium Ion Influx into axon terminal
24
Q
- What represents a factor by which the concentration of calcium ion increases in the cytosol after release from the sarcoplasmic reticulum?
A
- 100
25
Q
- Which of the following maintains an optimum calcium concentration gradient to
facilitate return of calcium to SR?
A
- Calsequestrin
26
Q
- Fast twitch fibers have what characteristics?
A
- They are more fatigable than slow twitch fibers
27
Q
- Which of the following represents an example of an eccentric contraction?
A
- The triceps muscle while lowering the body to the floor during a push up
28
Q
- Which of the following are anchored to the presynaptic membrane and associated with synaptic vesicles to which they are tethered by short filaments?
A
- Dense bars
29
Q
- In order for an acetylcholine‐gated ion channel to open, how many Ach molecules are necessary to attach to its (channel) alpha subunits?
A
- Two
30
Q
- Which of the following represents the first thing that happens after Ach binds to the
ligand‐gated channels on the sarcolemma?
A
- An end plate potential is created on the muscle fiber
31
Q
- The vesicles for acetylcholine are transported to the axon terminal from where?
A
- Golgi
32
Q
- Which of the following can be used to inactivate acetylcholinesterase?
A
- Neostigmine
