Histology Quiz

The two muscle types that are striated are

• Skeletal and smooth

• Skeletal and cardiac

• Cardiac and smooth

Answer explanation

Both cardiac and skeletal muscle tissue appears striated (striped) under a microscope. They both contain myofibrils (a contracting organelle in muscle cells). Smooth muscle does not have myofibrils.

What type of muscle tissue is this?

• Skeletal

• Cardiac

• Smooth

Answer explanation

The cells appear branched. There is only one nucleus in each cell. There are dark lines (intercalated discs) between cells. This is cardiac muscle tissue, which is only found in the heart.

What kind of epithelial would you expect between the lungs and capillaries, where oxygen and carbon dioxide must diffuse quickly between the structures?

• Simple squamous epithelium

• Simple columnar epithelium

• Stratified squamous epithelium

• Transitional epithelium

Answer explanation

Simple squamous epithelium is one cell thick, so substances can cross over quickly. In other areas, the epithelium's job is to keep substances out (i.e., columnar epithelium) or to stretch as far as possible (i.e., transitional epithelium in the bladder).

T/F Blood is a type of connective tissue.

• True

• False

The two types of nervous tissue are neurons and ______________.

Answer explanation

Glial cells are the helper cells that protect and maintain neurons.