Which of the Following Statements Is True of the Immune

question 35

Multiple Choice

Which of the following statements is true of the immune system?

• A) Its machinery consists of billions of red blood cells.
• B) When a person is under stress, the levels of bacteria and viruses drop dramatically.
• C) Lower levels of natural killer (NK) cells in stressful situations indicate a weakened immune system.
• D) Stress increases the number of natural killer (NK) cells in the body.

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Definitions:

Heart Rate

The number of heartbeats per unit of time, typically expressed in beats per minute (BPM), indicating the heart's activity level.

Digestion

The biological process by which the body breaks down food into absorbable components for energy, growth, and cell repair.

Autonomic Arousal

The involuntary activation of the autonomic nervous system, leading to physical responses such as increased heart rate, sweating, or adrenaline release.

Emotional Experiences

Emotional experiences refer to the complex feelings and reactions individuals have in response to various events, situations, or stimuli, encompassing a wide range of feelings from happiness to sadness.