The following are major steps in the process of intramembranous ossification:
1. Clusters of osteoblasts form osteoid that becomes mineralized.
2. Osteoblasts differentiate within mesenchymal connective tissue.
3. Spicules of bone radiate out from the ossification centers.
4. Mesenchymal cells aggregate.
What is the correct order for these events?
A) 4, 1, 2, 3
B) 2, 1, 3, 4
C) 4, 2, 1, 3
D) 2, 3, 1, 4
E) 3, 4, 2, 1
A ________ consists of a combination of a weak acid and its associated anion.
A) buffer
B) strong base
C) strong acid
D) cation
E) weak base
Which of the following is true concerning a sty?
A) often caused by bacteria
B) is a blocked gland on the eyelid
C) may involve a sebaceous gland
D) may involve a tarsal gland
E) All of the answers are correct.
The process by which antibodies bind to antigenic sites on viruses or toxins, rendering
them incapable of binding to other cells, is called
A) opsonization.
B) activation.
C) agglutination.
D) precipitation.
E) neutralization.
What is released from the structure labeled “9”?
Figure 10-1 Skeletal Muscle Fiber
A) sarcoplasm
B) acetylcholine
C) protein
D) calcium ions
E) acetylcholinesterase
The muscle that retracts and elevates the upper lip is the ________ muscle.
A) orbicularis oculi
B) zygomaticus minor
C) orbicularis oris
D) masseter
E) buccinator
Identify the structure labeled “5.”
Figure 15-2 The Corticospinal Pathway
A) ventral root
B) upper motor neuron
C) first-order neuron
D) second-order neuron
E) dorsal root
Identify the round structure labeled “3.”
Figure 16-1 ANS Pathway
A) dorsal root ganglion
B) spinal nerve
C) chain ganglion
D) intramural ganglion
E) rami communicantes
Figure 23-1 The Upper Airways
What is the function of the structure labeled “8”?
A) forces air into the lungs
B) causes air to swirl within the respiratory passageway
C) prevents food from entering the larynx
D) acts like a supplementary air pump
E) adjusts tension of vocal folds
The technical term for chewing is
A) mastication.
B) deglutition.
C) peristalsis.
D) segmentation.
E) borborygmus.
Where does growth in length occur?
Figure 6-2 Endochondral Ossification
A) 1
B) 2
C) 3
D) 4
E) 5