Which of the following is an evolutionary hypothesis to explain morning sickness?
A. It is an adaptation to protect the embryo from toxins
B. It prevents too much weight gain during pregnancy
C. It is a vestigial artifact left over from early mammalian ancestors
D. It is a natural form of birth control
E. It alerts the woman that she is pregnant so that she is careful not to expose herself to harmful substances
A. It is an adaptation to protect the embryo from toxins
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Where in the brain are the neurons that generate the breathing rhythm located? Where are the peripheral chemoreceptors located?
What will be an ideal response?
Degeneration of spinal motor neurons in adults may be due to a lack of ________ factor.
A. glial-derived neurotrophic (GDNF) B. nerve growth (NGF) C. neurotrophin-3 D. brain-derived neurotrophic (BDNF)
The orgasm-emission phase of the male sexual response is stimulated by ________.
A. efferent parasympathetic signals from the sacral region of the spinal cord B. efferent somatic signals from the thoracic region of the spinal cord C. efferent parasympathetic signals from the lumbar region of the spinal cord D. efferent sympathetic signals from the lumbar region of the spinal cord E. efferent sympathetic signals from the sacral region of the spinal cord
The levator palpebrae superioris muscle will raise the eyebrows.
Answer the following statement true (T) or false (F)