Homeostasis depends on the activity of body systems to adjust a variable. Because our bodies work so well to maintain variables at set point, we often do not even notice the systems they use to do it. But in someone who is ill, these systems may not be able to maintain homeostasis; you need to be aware of this to head off possible problems.
Ans: sweat glands, muscles, respiratory system, urinary system, throat muscles
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In relationship to the diaphysis of a long bone, the osteons are
A) radial. B) anterior. C) parallel. D) proximal. E) diagonal.
The layer of a vessel wall that contains smooth muscle is the tunica __________.
Fill in the blank(s) with the appropriate word(s).
The part of the nervous system that controls voluntary activities is the:
a. central nervous system b. autonomic nervous system c. somatic nervous system d. peripheral nervous system
Which of the following would occur if you touched a hot object with your right hand?
A. A stretch reflex would be triggered that would cause contraction of extensor muscles in the right arm. B. Nociceptors send pain information to the cerebral cortex, and descending activation of alpha motor neurons to extensor muscles would make you withdraw your right hand from the object. C. A withdrawal reflex would be triggered by stretch receptors that would inhibit contraction of extensor muscles of the right arm. D. A withdrawal reflex would be triggered by nociceptors that would stimulate contraction of flexor muscles in the right arm. E. Reflex mechanisms would stimulate contraction of the extensor muscles of the right arm.