Question

26. Place in order the true events of electrochemical signaling & muscular contraction, which occur at the neuromuscular junction.                       Note: not all letters are correct, read carefully.

33. First (             )                                             a. Neurotransmitter released across synapse

                                                                b. Ca binds to the thick filament of sarcomere

34. Second (    )                                             c. Release of neurotransmitters from post-synaptic cell

                                                                d. ACH received at post-synaptic receptors

35. Third (           )                                             e. Ca binds to the thin filament of sarcomere

32. Movement of the human eye is dependent upon the action of 6 extra-ocular muscles. Which of the following choices is NOT an extra-ocular muscle?
    1. External oblique                                                                               c. Lateral rectus
    2. Superior oblique                                                                               d. Inferior rectus

32. If a large muscle body crosses over the lateral aspect of a joint & attaches at lateral bony processes, the muscle most likely serves to perform what major motion?
    1. Adduction                                                                                           c. Flexion
    2. Abduction                                                                                           d. Extension

32. Which of the answer choice correctly identifies a key function of the muscles of the pelvic floor?
    1. Urination control                                                                              d. Support pelvic viscera
    2. Resist increase in intrabdominal pressure                             e. Allow support for sexual function
    3. All of the above (A, B, D, E)                                                           f. None of the above (A, B, D, E)

Answer 1

1.First- The neurotransmitter released across the synapse.

Second- ACh received at postsynaptic receptors

Third- Ca binds to the thin filament of the sarcomere

2a.External oblique is not an extra ocular muscle.

The extra ocular muscles are 7 in number,Out of these, 6 are responsible for the eye movement and one muscle that control the elevation of eyelid (Levator palpebrae superioris). The contraction of these muscle causes the eye movements in various directions.

1.Superior rectus

2.Levator palpebrae superioris

3.Lateral rectus

4.medial rectus

5.Superior oblique and

6.Inferior oblique

7.Inferior rectus

3.c.Flexion

The muscle move body parts by contracting and relaxing, The muscles can pull the bones, but can't push them back to the rest position.Hence they work as a pair of flexors and extensors. Here the given muscle act as a flexor at the joint.

4.c

These are a layer of muscles that support the pelvis region's organs and span the bottom of the pelvis.The organs are bladder and large intestine in men and bladder,large intestine and uterus in women

All are the functions of pelvic floor muscles.

• Opening of the vagina, anal and urethra
• It has sexual function in men and women.
• Act as a floor to support the abdominal viscera including the rectum
• It resist increase in intra-abdominal pressure