The cartilaginous section at the lower end of the sternum, which is not attached to any ribs, and gradually ossifies during adult life is:

1. manubrium

2. body

3. xiphoid process

4. clavicular surface

All thoracic vertebrae:

1. lack a transverse process.

2. lack a body.

3. have facets for ribs.

4. have transverse foramen.

In humans, marrow is colloquially characterized as "red" or "yellow" marrow where the latter:

1. makes RBCs but not WBCs.

2. is found in flat bones only.

3. makes WBCs but not RBCs.

4. mostly adipose tissue.

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