Acetylcholinesterase:

1. helps in binding of acetylcholine to its receptors.

2. catalyzes the synthesis of acetylcholine from acetate and choline.

3. stimulates receptors within the postsynaptic membrane.

4. breaks down acetylcholine.

During relaxation in smooth muscle:

1. calcium is removed from troponin.

2. ${\mathrm{Ca}}^{2+}$ bind to calmodulin.

3. myosin phosphatase removes phosphate from myosin.

4. Calcium is released from the sarcoplasmic reticulum.

The drug curare causes:

1. flaccid paralysis.

2. spastic paralysis.

3. smooth muscle degeneration.

4. cardiac failure.

A type of strength training in which the joint angle and muscle length do not change during contraction is termed as:

1. isometric contraction.

2. isotonic contraction.

3. concentric contraction.

4. eccentric contraction.

The joint between two pubic bones is called as:

1. syndesmosis

2. gomphosis

3. symphysis

4. synchondrosis

The cancellous bone beneath the articular cartilage in a synovial joint:

1. provides a smooth surface for articulating

2. absorbs shocks and helps protect the joint

3. holds together the bones of the synovial joint

4. secretes synovial fluid

The joint that is weak inferiorly and is most likely to be dislocated is:

1. knee joint

2. hip joint

3. shoulder joint

4. elbow

A decrease in the mass of the muscle most commonly experienced when persons suffer temporary disabling circumstances is called as:

1. hypertrophy

2. atrophy

3. dystrophy

4. peristalsis

Exposure to Sarin, a nerve gas will cause all the following except:

1. Failure to release acetylcholine at the neuromuscular junction

2. Prolonged depolarization of the motor end plate

3. Paralysis eventually leading to death

4. Inability to break down acetylcholine

The vitamin required for collagen synthesis that holds teeth in their sockets is the vitamin:

1. A

2. B

3. C

4. D