In a sarcomere, which letter is associated with a region within the A band that is more lightly shaded because only thick filaments are present?
A. I
B. Z
C. A
D. H
E. M
Answer: D
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A karyotype of a baby born with abnormalities indicates that the child has 47 chromosomes. What conclusion could you draw?
A. The developing embryo was exposed to a teratogen between weeks 3 and 4 after fertilization. B. The zygote was exposed to a mutagen. C. The baby has Turner syndrome. D. Nondisjunction during meiosis affected either the egg or sperm. E. The mother was probably over the age of 35 when she conceived.
The pituitary gland is located _________ to the hypothalamus and is connected by the ________
A. superior, thalamus B. inferior, infundibulum C. inferior, epithalamus D. posterior, infundibulum E. superior, pars nervosa and primary plexus
All reflex arcs contain an interneuron.
Answer the following statement true (T) or false (F)
The heart is enclosed by three membranes: an outer fibrous layer and an inner serous membrane pair
Indicate whether the statement is true or false