Discuss the activation, operation, and consequences of the body's fight-or-flight mechanism
The body responds to stress by activating the fight-or-flight mechanism, which prepares a person to take action by stimulating the vital defense systems. This stimulation originates in the hypothalamus and the pituitary gland in the brain. The hypothalamus activates the sympathetic nervous system, and the pituitary activates the release of catecholamines (hormones) from the adrenal glands.
These hormonal changes increase heart rate, blood pressure, blood flow to active muscles and the brain, glucose levels, oxygen consumption, and strength—all necessary for the body to fight or flee. For the body to relax, one of these actions must take place. However, if the person is unable to take action, the muscles tense up and tighten. This increased tension and tightening can be dissipated effectively through some coping techniques.
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What will be an ideal response?
Which surface lesion is a small, round, swollen area, typically an allergic reaction?
A) vesicle B) wheal C) pustule D) papule
Gentle stretching and relaxation of muscles will
A) decrease stress hormones. B) increase inflammation. C) decrease blood flow. D) result in stiff muscles.
The definition of pallor is:
A) pertaining to fever. B) a lack of color. C) palm of the hand. D) a diseased state.