Which is true about mediated transport across cell membranes?

A. As the concentration gradient across a membrane increases, the transport rate always increases.
B. It refers both to simple diffusion and to the active transport of molecules.
C. It is nonspecific; any transporter can transport any molecule across the cell membrane.
D. It is characterized by saturable carriers and a maximum velocity of transport.
E. It refers to the movement of ions through protein channels.


Answer: D

Anatomy & Physiology

You might also like to view...

Pure antibody preparations specific for a single antigenic determinant are called ________ antibodies

Fill in the blanks with correct word

Anatomy & Physiology

Production of new primary oocytes by mitosis continues throughout a woman's life.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

Animal fat deposits provide an energy source

Indicate whether the statement is true or false

Anatomy & Physiology

The process of synthesizing glucose from non-carbohydrates is called

A) glycogenolysis. B) glycogenesis. C) glycolysis. D) gluconeogenesis. E) glucose reclamation.

Anatomy & Physiology