Name three unencapsulated sensory receptors and tell what they are used for.
What will be an ideal response?
1. Free nerve endings are found throughout the body. They are used by most body tissues to determine stretching, joint positioning, etc. In the epidermis they become pain receptors, heat and cold receptors, and possibly very light pressure receptors.
2. Modified free nerve endings called tactile disks are used as light touch receptors.
3. Hair follicle receptors are mechanical receptors that become very fine touch receptors.
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A new mother notices that her 6-month-old infant has a yellow-orange complexion. Fearful that the child may have jaundice, she takes him to her pediatrician. After examining the child and learning about the infant's diet, the pediatrician declares him perfectly healthy and advises the mother to watch the child's diet. What is likely the cause for the change in skin color?
It has been reported that King Henry VIII of England divorced his wives because they were unable to produce a male heir to the throne. Some say the lack of a male heir is also used as justification for marrying additional wives in polygamous societies. From a genetics standpoint, what is wrong with these assumptions?
What will be an ideal response?
Which muscle is named for its shape?
A. Frontalis B. Masseter C. Biceps brachii D. Trapezius
During the eighth week
A. ossification begins. B. all organ systems have appeared. C. eyes, ears, and nose are noticeable. D. mother begins to feel movement.