Which of the following defines the processes and precautions that can be taken to control the spread of infection?

# Which of the following defines the processes and precautions that can be taken to control the spread of infection? 

a. Chemical disinfectant. 

b. Aseptic technique. 

c. Infection control. 

d. Surgery cleanliness. 

The correct answer is C. Infection control.

 Infection control refers to the measures and protocols designed to prevent and control the spread of infections in healthcare settings and other settings where people may be at risk of contracting infectious diseases. This can include practices such as hand hygiene, wearing personal protective equipment (PPE), isolating patients with infectious diseases, and disinfecting surfaces and equipment. Chemical disinfectants, aseptic technique, and surgery cleanliness are all important components of infection control, but they are specific methods or tools used to achieve the goal of controlling the spread of infection. 

All of the following are examples of fibrous joint EXCEPT:

 # All of the following are examples of fibrous joint EXCEPT:

A. Symphysis

B. Gomphosis

C. Sutures

D. Syndesmosis

The correct answer is A. Symphysis.

Fibrous joints: Consists mainly of collagenous junctions between bones, Eg: Sutures, Gomphosis and syndesmosis

Cartilaginous joints: Synchondrosis (Primary cartilaginous joint) and Symphysis (Secondary cartilaginous joint)

Symphyses: All symphyses are median and almost confined to the axial skeleton.

Negative growth is a characteristic of:

 # Negative growth is a characteristic of:

A. Testis

B. Brain

C. Mandible

D. Thymus

The correct answer is D Thymus.

According to Scammon’s curves for growth, the growth of the neural tissues is nearly complete by 6 or 7 years of age. General body tissues, including muscle, bone, and viscera, show an S-shaped curve, with a definite slowing of the rate of growth during childhood and an acceleration at puberty. Lymphoid

tissues proliferate far beyond the adult amount in late childhood and then undergo involution at the same time that growth of the genital tissues accelerates rapidly. 

(From Scammon RD. The measurement of the body in childhood. In: Harris JA, ed. The Measurement of Man. Minneapolis: University of Minnesota Press; 1930.)

In sutures, there is proliferation of connective tissue followed by replacement of bone. This is called:

 # In sutures, there is proliferation of connective tissue followed by replacement of bone. This is called:

A. Endochondral bone growth

B. Intramembranous growth

C. Appositional growth

D. Periosteal growth

The correct answer is B. Intramembranous growth.

During the fourth month in utero, there is an ingrowth of blood vascular elements into various points of the chondrocranium (and the other parts of the early cartilaginous skeleton). These areas become centers of ossification, at which cartilage is transformed into bone in the process called endochondral ossification, and islands of bone appear in the sea of surrounding cartilage. The cartilage continues to grow rapidly but is replaced by bone with equal rapidity. The result is that the amount of bone increases

rapidly and the relative (but not the absolute) amount of cartilage decreases. Eventually, the old chondrocranium is represented only by small areas of cartilage interposed between large sections of bone, which assume the characteristic form of the ethmoid, sphenoid, and basioccipital bones. Growth at these cartilaginous connections between the skeletal bones is similar to growth in the limbs.

Not all bones of the adult skeleton were represented in the embryonic cartilaginous model, and it is possible for bone to form by secretion of bone matrix directly within connective tissues, without any intermediate formation of cartilage. Bone formation of this type is called intramembranous ossification. This type of bone formation occurs in the cranial vault and both jaws. 

Ref: Contemporary Orthodontics, William R. Proffit