Review questions

• Epithelium is the covering, lining and glandular tissue whose functions include protection, absorption, and secretion. • Epithelia are named according to cell shape and cell arrangement • Connective tissue is the supportive, protective and binding tissue characterized by the presence of an extracellular matrix produced and secreted by the cells. • Fat, ligaments, tendon, bones and cartilage are all connective tissues. • Muscle tissue is specialized to contract or shorten to produce movement. • There are three types of muscle tissue, known as skeletal muscle, cardiac muscle, and smooth muscle. • Nervous tissue is made of cells called neurons that receive and transmit nerve impulses throughout the body.

Review questions

Question 1

Which organelle is considered to be the control center of the cell?

A. The endoplasmic reticulum. B. The nucleus. C. The mitochondria D. The golgi apparatus The answer is B, the nucleus.

Question 2

Which of the following is not a function of DNA? A. Provides a blueprint of instructions for the body. B. Provides a site for protein synthesis. C. Responsible for the building of proteins. D. Key role player in cell reproduction. The answer is B, DNA does not provide a site for protein synthesis.

Question 3

When the cell is not dividing, DNA combines with protein to form a loose network of threads called the…

A. Chromatin B. Nucleoli C. Spindle fibers D. Chromosomes The answer is A, DNA combines with protein to form chromatin.

Question 4

The outer limits of the cell are defined by… A. The plasma membrane B. The cytoplasm C. The cytosol D. The endoplasmic reticulum The answer is A, the plasma membrane.

Question 5

Which constituent of cytoplasm is not a functional unit? A. Cytosol B. Organelles C. Inclusions D. Plasma membrane The answer is C, the inclusions.

Question 6

Which organelle is responsible for the transport of substances between cells? A. Endoplasmic reticulum B. Golgi apparatus C. Peroxisome D. Centrioles The answer is A, the endoplasmic reticulum.

Question 7

Which organelle is responsible for the digestion of worn out cell structures and foreign objects? A. Mitochondria B. Peroxisomes C. Lysosomes D. Ribosomes The answer is D, the ribosomes.

Question 8

Which of the following is a function of epithelial tissue? A. Protection B. Absorption C. Secretion D. All of the above The answer is D, all of the above.

Question 9

Which characteristic of epithelial tissue is used to classify epithelia? A. Arrangement B. Mobility C. Flexibility D. Attachment site The answer is A, the epithelial arrangement.

Question 10

Simple epithelia is thin, making it suitable for areas of filtration and substance exchange, as in the… A. Alveoli of the lung B. Skin C. Esophagus D. Endocrine glands The answer is A, the alveoli of the lung.