Which of the following passageways delivers air directly into each lung?

A) Trachea B) Pharynx C) Bronchiole D) Bronchus E) Larynx


D

Biology & Microbiology

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Many structures and organs in the body are lined by epithelial tissue, and this layer of tissue

can vary in thickness from a single layer of cells to multiple layers of cells. Based on function, which of the following do you think will have the most cell layers?

a. skin b. lungs c. blood vessels d. both lungs and blood vessels

Biology & Microbiology

Most null cells are destined to become what type of cell?

A) mast cells B) plasma cells C) effector cells D) natural killer cells (NK cells) E) dendritic cells

Biology & Microbiology

A signal peptide _____

A) directs an mRNA molecule into the cisternal space of the ER B) terminates translation of messenger RNA C) helps target a protein to the ER D) signals the initiation of transcription

Biology & Microbiology

Antibodies and T-cell receptors are both produced by B cells

Indicate whether the statement is true or false

Biology & Microbiology