101 NPB Midterm 1 Spring 2009 BATISTA
1) In smooth muscle, what process must occur before thick filament interact with thin filament?
a) The myosin light chain is phosphorylisted
b) The cell hyperpolarize
c) Ca2+ binds to troponin
d) The thin filament hydrolyzes ATP
2) In skeletal muscle, an action potential travel down a T-Tubule
a) Activate the DHPR
b) Activate Troponin
c) Via gap junction
d) Induces acetylcholine release
e) Activate the SerCa pump
3) What Statement is about Reflex is True?
a) All reflex are unlearned response
b) In a reflex loop, the response always counteract the stimulus
c) All reflex loops require a central integrator
d) All reflex cannot be voluntary over ridden
e) All reflex is autonomic
4) What feature of the Auditory System allows discern the pitch of a sound?
a) The AP frequency in the auditory nerve encode pitch
b) Pitch is encode in the AP velocity in a auditory nerve
c) Specific pitch maximally displaces certain region of the basil membrane
d) Pitch is encoded by the hair cell depolarization amplitude
5) Your patient impaired procieption. After test, conclude his trouble arise from sensory afferent in the skin. Which neurons if worked improperly most likely induce its problem?
a) Polymodal Nociceptor
b) The Alpha motor neuron
c) Ruffni ending
d) Merkel discs
e) None of the above
6) What is Major feature of Receptor Potential?
a) In mechanoreceptor, its cause by Na+ leaving cell
b) Its actually an action potential
c) It occurs in the presynaptic axon terminal
d) Its magnitude is proportion to stimulus size
7) Pick the True Statement about Visual System.
a) Photoreceptors can fire AP
b) The fovea primary filled with Rod
c) Our brain is incapable of differentiating between signal and noise when present a visual stimulus
d) Information from the right visual field of the left eye is process by the left visual cortex
e) Off ganglion cell depolarize in light
8) Pick the True statement about Receptive field.
a) The receptive fields of retinal ganglion cell shape like rectangle
b) The receptive fields of all touch receptor are identical in size
c) Small RF are associated with high acuity
d) Two of the above statement is true
e) All of the above is true
9) A Neurotoxin inhibit sympathetic pathway, but not parasympathetic or somatic motor pathway, what could this be doing?
a) It accelerate the acetylcholine destruction
b) It destroy the CNS
c) It antagonized adrengic receptor
d) It activated nACh receptor
e) It antagonized mACh receptor.
10) Patient LC suffer severe CNS damage. Initial test indicate that he can chew and exhibit pain withdrawal reflex in the Right arm. When ask about his profession, the answer is :
Ohoh, myyesandthrough..um..see..fourteen liftall the way Cant maintain balance and need help walking.
What damage is he experiencing?
a) Damage to Brocas
b) Damage to left spinal cord at the level of the arm
c) Damage to vestibulocerebellum
d) Primary motor cortex damage
e) Right PTO damage.
11) What is absolutely require in order to induce NT release by motor neuron?
a) Muscle contraction
b) Calcium influx at the presynaptic terminal
c) Ca2+ release from the SR
d) An AP in the motor neuron
e) Two of the Above is correct
12) Patient TM exhibits excessive movements while reaching for a cup of the desk, which following would most likely contribute to his aliment?
a) 1b-afferent insentativity
b) Temporal lobe damage
c) Basal ganglion damage
d) Vestibulocerebellum damage
e) A complelely sever lateral cortical tract
13) Mistake in the problem, free points
14) You discover a brand new cell type and excitable cell. Which is the Strongest support your conclusion
a) The cell highly permeable to K+ at rest
b) The cell is found in the brain
c) The cell exhibit action potential
d) The cell resting mP is -70mV
e) 2 of them is correct
15) In the knee jerk