Which of the following provide the greatest surface area for gas exchange?
A) alveolar sacs
B) alveoli
C) respiratory bronchioles
D) alveolar ducts
B) alveoli
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Which of the following has NO relationship?
a. peptide hormones and secretory granules b. steroids and lipid droplets c. Catecholamines and adrenal cortex d. peptide hormones and rough endoplasmic reticulum e. thyroid hormones and lipophilic molecules
Which of the following is NOT a major job of the digestive system?
A) acid-base homeostasis B) fluid and electrolyte homeostasis C) manufacturing blood cells D) ingestion of vitamins and minerals
In opsonization,
A) a pathogen is coated by proteins to facilitate its destruction by neutrophils and macrophages. B) the cell wall of a pathogen is breached, leading to death of the cell. C) MHC II glycoproteins display a fragment of an alien cell. D) antigens bind to antibodies to become antigen-antibody complexes. E) antibodies tie many antigens together.
Sensory receptors sense only stimuli external to the body, such as light, sound waves, smell, and touch
Indicate whether the statement is true or false