MoD week7 Term2 Med23

Cellular Adaptations

QUIZ

by

Dr Andra Vidinei

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​MoD 7

Med 23

Multiple Choice

During which phase of the cell cycle is DNA synthesised? (SBA)

• G1

• G2

• M

• S

S phase, or synthesis, is the phase of the cell cycle when DNA packaged into chromosomes is replicated. This event is an essential aspect of the cell cycle because replication allows for each cell created by cell division to have the same genetic make-up. (The specifics of how this replication takes place is covered in the DNA replication SparkNote in the series of SparkNotes dedicated to Molecular Biology.) During S phase a number of events additional to chromosomee replication take place. Cell growth continues through S phase, as does the rate of synthesis of a number of proteins and enzymes that are involved in DNA synthesis. Once DNA replication is complete the cell contains twice its normal number of chromosomes and becomes ready to enter the phase called G2.

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S = DNA synthesis

Multiple Choice

Which of the following is an example of "stable" cell population? (SBA)

• Epithelium

• Cardic myocytes

• Hepatocytes

• Skeletal myocytes

In cellular biology, stable cells are cells that multiply only when needed. They spend most of the time in the quiescent G 0 phase of the cell cycle but can be stimulated to enter the cell cycle when needed. Examples include the liver, the proximal tubules of the kidney and endocrine glands.

LIVER

Multiple Choice

What HYPERTROPHY is describing? (SBA)

• Cell(s) increased in size

• Multiplication to replace loss

• Increased cell number, above normal

• Cell becames bigger, mutating

Multiple Choice

Barret's Oesophagus describes the METAPLASTIC change of oesophageal ...................... epithelium to gastric epithelium. (SBA)

• Simple

  columnar

• Stratified columnar

• Stratified

  squamous

• Pseudo

  stratified

Multiple Select

(MCQ) When describing an orifice, ATRESIA can be/mean:

• Total Blockage

• Partial Blockage

• Lack (absent)

• Involution

Multiple Choice

Chronic HBP (hypertension) leads to which cellular adaptation? (SBA)

• Dysplasia

• Hyperplasia

• Hypertrophy

• Metaplasia

Examples of pathological hypertrophy include ventricular cardiac muscle hypertrophy in response to the increased workload of systemic hypertension or stenotic valvular disease.

Have a nice day. Happy teaching!

Remeber to use the WORKBOOK ! :)