Simple squamous epithelium is structured to best provide A D

Simple squamous epithelium is structured to best provide:

A. Diffusion of substances across the membrane

B. Protection/withstanding wear and tear

C. Secretion and absorption

D. Receptor Mediated Endocytosis

E. Ability to stretch without tearing

Which of the following cells is not a resident cell found  in peripheral Connective Tissue?

A. Oligodendrocytes

B. Macrophages

C. Mast cells

D. Phagocytes

E. Fibroblasts

Which of the following is NOT true of the Na+/K+ pump?

A. It is an active transport mechanism requiring ATP expenditure.

B. It pumps Na+ out of the cell and K+ in to the cell at a rate of  2 Na+ for every 3 K+.

C. It contributes to a cell\'s resting membrane potential

D. It helps to establish an overall negative intracellular charge.

E. all of the above

Which of the following is NOT correct regarding cardiac muscle tissue?

A. This tissue is highly mitotic.

B. It is contain of actin and myosin proteins.

C. It is considered involuntary muscle tissue.

D. It is a type of striated muscle tissue.

E. None of the above are correct

Blood in the venous system is returning to the ________side of the heart to be pumped to the _____________.

A. left, lungs

B. right, lungs

C.

D. right, body

Solution

1. A. Diffusion of substances across the membrane.

simple squamous epithelium is a single layer of flat cells in contact with the basal lamina (one of the two layers of the basement membrane) of the epithelium.This type of epithelium is often permeable and occurs where small molecules pass quickly through membranes via filtration or diffusion. Simple squamous epithelia are found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is required. It is also called pavement epithelium due to its tile-like appearance. This epithelium is associated with filtration and diffusion.This tissue is extremely thin, and forms a delicate lining.

2. A.Oligodendrocytes .

These cells occur in nervous tissue.

3. B. It pumps Na+ out of the cell and K+ in to the cell at a rate of  2 Na+ for every 3 K+.

Na-K pump pumps 3 Na+ out in exchange of 2 K+ ions.

4. A. This tissue is highly mitotic.

5. B. right, lungs.

Venous blood returns to right side of heart (right auricle) and is pumped to lungs for oxygrnation.