Describe the gross anatomy of the thymus
A) The thymus is a deep red, elongated organ covered by a capsule. It is soft and contains indentations for the organs surrounding it.
B) The thymus is a bean-shaped organ covered by a capsule with multiple afferent vessels and a single efferent vessel delivering lymph to it.
C) The thymus is an aggregate of lymphoid tissue without a capsule embedded in the epithelial lining of various organs.
D) The thymus is the largest visceral organ. It is a firm and reddish brown organ containing 4 lobes.
E) The thymus is a pink, grainy organ covered by a capsule that divides it into two lobes, which divide further into lobules.
Answer: E
You might also like to view...
An over-production of cortisol causes ________
A) Addison's disease B) Hyperpituitarism C) Cushing's syndrome D) Graves' disease
The striated appearance of skeletal muscle is due to the
a. orderly arrangement of the T tubules b. orderly arrangement of the lateral sacs of the sarcoplasmic reticulum c. orderly arrangement of the thick and thin filaments into A and I bands d. orderly arrangement of the motor units e. presence of white and red muscle fibers within the muscle
The bacterium that causes tetanus produces a toxin that affects the central nervous system and skeletal muscles, producing powerful tetanic contractions of the skeletal muscles. The toxin probably acts by
A) Increasing the amount of acetylcholinesterase in the synapse. B) Making the cells less permeable to sodium ions. C) Increasing the amount of potassium ion in the intercellular fluid. D) Making the cell membranes more permeable to calcium ion. E) Competing with acetylcholine for receptors at the motor end plate.
The thirst center of the brain is located in the
A. hypothalamus. B. pons. C. hippocampus. D. occipital lobe.