The central nervous system (CNS) consists of
A) spinal and cranial nerves. B) the cerebrum and cerebellum.
C) the brain and spinal cord. D) nerves in the upper and lower limbs.
C
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The three ossicles of the middle ear are the malleus, incus, and tympani
a. True b. False Indicate whether the statement is true or false
________ is a mechanism in our body that continually senses the internal and external environment and the body makes adjustments to maintain homeostasis
A) Homeostasis B) Negative feedback loop C) Positive feedback loop D) Metabolism
A collection of cells that work together designates a(n)
A) chemical. B) organ. C) tissue. D) organ system. E) molecule.
Cytotoxic T cells
A. secrete perforin, which kills bacteria and viruses by perforating the membrane or coat that surrounds them. B. secrete proteins that neutralize bacterial toxins. C. are activated by interleukin 1. D. are converted to plasma cells when activated by MHC proteins. E. require Class I MHC proteins to recognize foreign antigens.