Characteristics of the Gallbladder
What will be an ideal response?
It stores and concentrates bile and releases it into the small intestine
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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.
Descending fibers from the pons to the cerebellum pass through these structures of the midbrain?
A) substantia nigra B) reticular formation C) superior colliculus D) corpora quadrigemina E) cerebral peduncles
Since the action potential "leaps" from node to node in a myelinated axon, ________.
A. action potentials move faster if the nodes are farther apart B. Na+ movement within the myelin sheath is possible C. Na+ channels are not present between the nodes D. myelinated axons need far less Na+ channels than unmyelinated axons
Which structure forms the floor and part of the walls of the third ventricle?
A) Pituitary gland B) Epithalamus C) Midbrain D) Hypothalamus E) Thalamus