______ Pain arising from the heart that is felt on the surface of the body is kn

Question

______ Pain arising from the heart that is felt on the surface of the body is known as:

A.       spindle pain

B.       referred pain

C.       phantom pain

D.       window pain        

______ The end-to-end arrangement of sarcomeres is a:

a.      myofiber

b.      myofilament

c.      myoblast

d.      myofibril

______ If cholinesterases are strongly inhibited which would occur – choose the BEST:

A.       Nicotinic receptors would be stimulated

B.       Alpha and Beta adrenergic receptors would be stimulated

C.       Muscarinic receptors would be stimulated

D.       a and b

E.       a and c

______ Which of the following statements about the NMJ is FALSE?

A.      One way conduction from axon to motor end plate

B.      Transmission by chemical means

C.      Multiple motor end plates on each sarcolemma

D.     Fatigue more readily than the neuron

Explanation / Answer

Pain arising from the heart that is felt on the surface of the body is known as:

B.       referred pain

Explanation: Referred pain is due to the common origin of ectodermal and mesodermal tissues during embryogenesis. Thus the sensory fibers from the skin surface and the internal organ converge on the same spinal cord level.

Phantom pain is the pain felt, even in the absence of the particular part of the body, due to irritation of the remaining nerve stump.

The end-to-end arrangement of sarcomeres is a:

d.      myofibril

Many myofibrils constitute a myofiber and many myofibers form a skeletal muscle.

Myofilaments are actin and myosin present in sarcomere.

If cholinesterases are strongly inhibited which would occur

E.       a and c

If acetylcholine esterase enzyme is inhibited, the ACh accumulates in the synaptic cleft and both nicotinic and muscarinic receptors are stimulated.

Which of the following statements about the NMJ is FALSE?

D.     Fatigue more readily than the neuron

During nerve-muscle preparation experiment, after continuous repeated stimulation of of sciatic nerve, the muscle stops responding.

But, when the muscle is stimulated directly, it responds by contraction.

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