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Unformatted text preview: ult of threshold depolarization at the neuromuscular junction, what happens on the adjacent sarcolemma?
A. Calcium ions enter the axon
B. Calcium ions enter the sarcoplasm from the
C. Acetylcholine is released into the synaptic cleft
D. Acetylcholine binds to post-synaptic receptors
on the sarcolemma.
E. Na+ moves across the sarcolemma into the
F. Opening of the chemically-gated sodium
G. Opening of the voltage-gated sodium channels.
Score: Opening of potassium channels.
Binding of calcium ions to Troponin C.
Uptake of ATP by the myosin heads.
Attachment of actin-myosin crossbridges and
swiveling of the myosin heads.
voltage-gated ion channels Value
0% Feedback Threshold depolarization will result in an action potential when it occurs at:
A. chemically-gated ion channels only
B. voltage-gated ion channels only Value
100% C. Both chemically-gated and voltage-gated ion
D. The receptive region. 0% Score: Feedback 0% 0.5/0.5 3.
anterior fontanel The large anterior fontanel hardens at:
A. 1.5 to 2 years after birth
B. late teens
C. early twenties
0% Feedback Value
0% Feedback Value Feedback 0/0.5 4.
pheromomes Which of the following secretes pheromones?
eccrine sweat glands
apocrine sweat glands
Answers 1 and 3
E. both answers 2 and 3 A.
D. Score: 0/0.5 5.
reative refractory period The relative refractory period occurs during:
A. opening of Na gates
+ 0% Student Response
B. opening of K+ gates
C. closing of K gates when excess K has left the 100%
D. opening of K+ gates when excess K+ has left the 0%
Score: Feedback 0.5/0.5 6.
autonomic vs. somatic The autonomic nervous system differs from the somatic nervous system in which of the following ways:
A. The autonomic system is motor only, while the
somatic is both motor and sensory.
B. The autonomic system has two motor neurons,
the somatic has only one, in each reflex arc.
C. The autonomic system has a ganglion in each
motor pathway from the CNS, the somatic
nervous system does not.
D. All of the above.
E. #2 and #3 only.
Score: Value Feedback 0%
100% 0.5/0.5 7.
Function of multipolar neurons Multipolar neurons function as:
A. spinal and cranial nerve sensory neurons
B. spinal and cranial nerve motor neurons
C. spinal and cranial interneurons
D. all of the above 0%
0% E. #2 and #3 only 100% Score: Value 0/0.5 8.
epiphyseal plate The last location within a long bone of cartilage formation is: Feedback Student Response
A. bone collar
B. epiphyseal plate Value
100% C. medullary canal
D. trochanter 0%
0% Score: Feedback 0.5/0.5 9.
osteoclasts Osteoclasts are derived at some point from:
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- Fall '12