Separation of the inner cell mass from the trophoblast forms the
A) blastocoele.
B) lacunae.
C) amniotic cavity.
D) chorion.
E) allantois.
C) amniotic cavity.
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Which of the following statements concerning the descending pathways of the spinal cord is true?
A. Many of the descending pathways decussate in the midbrain. B. These pathways start in the spinal cord and end in the brain. C. Descending pathways consist of upper and lower motor neurons. D. Descending pathways must synapse in the thalamus. E. Most descending pathways control sensory functions.
Homeostatic control systems and acclimatization are examples of biological adaptations.
Answer the following statement true (T) or false (F)
Pulmonary veins carry blood to the
A) right atrium. B) left atrium. C) lungs. D) aorta. E) pulmonary circuit.
Since many muscles are named for their location (origin and insertion), the occipitalis muscle probably originates on the ________ bone of the skull.
Fill in the blank(s) with the appropriate word(s).