While most of the cells in a hair are dead, the living epithelial cells are found in
A. the cortex of the hair shaft.
B. the cuticle of the hair shaft.
C. the hair bulb.
D. the hyponychium.
Answer: C
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Many polypeptide and glycoprotein hormones are secreted in discrete bursts called pulsatile secretions.
Answer the following statement true (T) or false (F)
Which of these functions cannot be attributed to the mucous membrane that lines the nasal cavity?
A) warms incoming air B) filters particles from incoming air C) moistens incoming air D) initial gas exchange between air and blood occurs here
Describe the ENS
A) The ENS is a division of the nervous system that includes the brain and spinal cord. B) The ENS is a division of the nervous system that involves sensory input only. C) The ENS is a division of the nervous system that involves the voluntary movements of the skeletal muscle. D) The ENS is a division of the nervous system that uses spinal reflexes to mediate changes in the effectors. E) The ENS is a division of the nervous system consisting of a network of neurons and nerve networks in the walls of the digestive tract that primarily operates locally, without instructions from the CNS.
After birth, the remnant of the umbilical vein becomes the
A. fossa ovalis. B. ligamentum venosum. C. medial umbilical ligament. D. ligamentum teres. E. ligamentum arteriosum.