Which is not correct regarding the thymus gland?
A. It is fully encapsulated by connective tissue.
B. Each thymic lobe is subdivided into lobules.
C. It is a bilobed organ located in the mediastinum.
D. Its thymic corpuscles are the site of T-lymphocyte maturation.
E. It reaches its maximum size at puberty, then regresses.
Answer: D
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Action potentials in the heart spread from cell to cell through
A. gap junctions. B. valves. C. interneurons. D. coronary vessels. E. desmosomes.
Which of the following bone shape is stated with an incorrect example?
A. Short bone - wrist and ankle bones B. Long bone - forearm bones C. Irregular bone - vertebrae D. Flat bone - thigh bone
A metarteriole is located between an arteriole and venule
Indicate whether the statement is true or false
What would be the effect of a drug that blocked muscarinic receptors on the smooth muscle of the iris that regulates the size of the pupil?
A. Blood vessels in the anterior part of the eye would constrict. B. The pupil would dilate. C. The eye would focus more clearly on near objects. D. The eye would focus more clearly on distant objects. E. The pupil would constrict.