Cellular Strategy & Systems
This structure, composed of microtubules, organizes the spindle during cell division and is found within the centrosome.
What is the centriole?
This connective tissue type is found in tendons and ligaments and is packed with parallel collagen fibers.
What is dense regular connective tissue?
The face is formed from tissues surrounding this central structure that develops in week 4.
What is the oral pit?
This enamel-forming protein is essential for enamel matrix formation and maturation.
What is enamelin?
This division of the peripheral nervous system relays sensory info to the brain and spinal cord.
What is the afferent system?
Which organelle is responsible for detoxifying harmful substances and synthesizing lipids?
What is the smooth endoplasmic reticulum?
Name the epithelial tissue type that appears to have multiple layers but is actually a single layer of cells with varying nuclei positions.
What is pseudostratified columnar epithelium?
This defect results from the midline constriction of the mandibular arch not disappearing during development.
What is a mandibular cleft?
These alternating light and dark lines in enamel rods are visible under polarized light and reflect growth patterns.
What are Hunter-Schreger bands?
Which cranial nerve provides taste to the anterior two-thirds of the tongue?
What is the facial nerve (cranial nerve VII)?
This stage of the cell cycle is when DNA replication occurs.
What is the S phase?
These ridges on the surface of enamel represent growth lines and are most visible at the cervical third of the crown.
What are perikymata?
During weeks 7–9, this programmed cell death process removes the epithelial barrier between palatal shelves.
What is apoptosis?
Before mineralizing, dentin appears as this non-calcified matrix.
What is predentin?
The pharyngeal pouch that gives rise to the palatine tonsils.
What is the second pharyngeal pouch?
This cell structure maintains shape, supports intracellular transport, and anchors organelles.
What is the cytoskeleton?
Which type of muscle tissue is involuntary, spindle-shaped, and lacks striations?
What is smooth muscle?
The part of the tongue that arises from the second pharyngeal arch and becomes immovable.
What is the base of the tongue?
Which cells induce the formation of odontoblasts during bell stage?
What are the inner enamel epithelial cells?
Name the type of joint formed by connective tissue that allows growth in the facial bones.
What is a suture (or syndesmosis)?
Which type of RNA carries instructions from the nucleus to the ribosome for protein synthesis?
What is messenger RNA (mRNA)?
This type of connective tissue cell produces collagen, elastin, and the extracellular matrix.
What is a fibroblast?
What structure forms from the fifth pharyngeal pouch and eventually contributes to the thyroid’s parafollicular cells?
What is the ultimobranchial body?
This epithelial structure dictates root length, thickness, and curvature.
What is Hertwig’s epithelial root sheath?
Which rare condition presents as a swelling with an opening on the neck due to incomplete closure of a developmental duct?
What is a thyroglossal fistula?