EMBRO/HISTO Midterm Review

The basis of motion in a muscle cell is the change from chemical to mechanical energy by enzymatic cleavage of adenosine diphosphate. Motion in a muscle cell is a result of the action of actin and myosin.

• 1st statement is false. 2nd statement is true.

• 1st statement is false. 2nd statement is false.

Cartilage can grow by either endochondral or interstitial growth. Bone grows by either appositional or interstitial growth.

• 1st statement is false. 2nd statement is true.

• 1st statement is false. 2nd statement is false.

Tendons connect muscles to the skeleton as they develop. Leukocytes are the most numerous blood cells.

• 1st statement is true. 2nd statement is true.

• 1st statement is true. 2nd statement is false.

Which of the following contain nuclei in the process of dying?

• Nonkeratinized epithelium.

• Parakeratinized epithelium.

Transmembrane proteins may help to transport molecules across the cell membrane. The Golgi apparatus sends proteins to the endoplasmic reticulum.

• 1st statement is true. 2nd statement is false.

• 1st statement is false. 2nd statement is true.

Which branchial arch eventually disappears?

• Fourth

• Fifth

From which structures does the face develop?

• Frontonasal process, maxillary process, mandibular arch.

• Oropharyngeal membrane, mandibular arch, forebrain.

Once fully healed, the outer-most layer of a graft issue area will be covered with what type of anuclear epithelial tissue?

• Keratinized simple squamous epithelium.

• Keratinized (or orthokeratinized) stratified squamous epithelium.

During your intraoral examination you can see a large amount mucous secretion coming from the respiratory passages. You assume it is due to the hyperactivity of goblet cells which are found in:

• pseudostratified epithelium.

• stratified squamous epithelium.

The periodontist biopsied some graft tissue. After treating the specimen for slide viewing, the image was enhanced under a microscope. The section of tissue was similar in nature to the thick skin of the foot. All of the layers of the epithelium could be seen except one. Which layer was this?

• Stratum spinosum.

• Stratum lucidum.