Answer the following questions true (T) or false (F)
1. The placenta, a temporary organ that is shed after the infant is born, is the site of exchange of oxygen, nutrients, and waste between the mother and fetus.
2. During month 4 of prenatal development, the fetus turns upside down in the vertex position.
3. The ductus arteriosus is a fetal vascular shunt that allows blood to flow from the pulmonary trunk directly into the aorta.
1. TRUE
2. FALSE
3. TRUE
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Air is forced out of the lungs during normal expiration due to _________.
A. contraction of the diaphragm B. elastic recoil of tissues C. contraction of bronchioles D. contraction of the external intercostal muscles
When examined in a longitudinal section, skeletal muscle has alternating light and dark bands producing a(n) ______ appearance.
a. cardiac. b. skeletal. c. smooth. d. striated. e. cardiac and smoot
The ________ is the fold of the dura mater that separates the cerebral hemispheres
A) falx cerebelli B) endosteal layer C) falx cerebri D) tentorium cerebelli
Which hormone disorder is associated with weight gain, sensitivity to cold, dry skin and hair, constipation, low metabolic rate, and sluggishness?
A. Acromegaly B. Addison disease C. Androgen-insensitivity syndrome D. Hyperthyroidism E. Hypothyroidism