Match the action with the specific reflex.Removing hand from a hot iron
A. Withdrawal reflex
B. Reciprocal innervation
C. Stretch reflex
D. Crossed extensor reflex
E. Golgi tendon reflex
Answer: A
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Neutrophils
a. are the most abundant type of mononuclear leukocyte b. attach to a parasitic worm and secrete substances that kill it c. increase in numbers in response to granulocyte colony-stimulating factor d. are similar structurally to mast cells e. have characteristics a and c
During aging, muscle is often replaced by dense connective tissue, a process called ________.
Fill in the blank(s) with the appropriate word(s).
What are blood islands, and from which cells do they form?
A) Blood islands are primitive capillary networks formed from embryonic cells scattered within the yolk sac. B) Blood islands are primitive arteries that are formed from hemangioblasts. C) Blood islands are primitive veins that are formed from hemangioblasts. D) Blood islands are aggregations of embryonic cells scattered within the yolk sac that form blood vessels and blood cells. E) Blood islands are collections of blood cells that are formed from embryonic hematopoietic stem cells.
What is the name of the large opening in the occipital bone that allows the spinal cord to exit the cranial cavity?
A. Magnum foramen B. Foramen occipital C. Occipital foramen D. Foramen magnum