객관식
Which of the following statements is true regarding parasympathetic tone?
147
views
10. Cell Signaling
Introduction to Cell Signaling
객관식
Which of the following best describes a hormone?
A
A structural component of the plasma membrane.
B
A molecule that stores genetic information.
C
A chemical messenger that is secreted into the bloodstream and acts on distant target cells.
D
A protein that catalyzes biochemical reactions within the cell.
검증된 단계별 안내1
Step 1: Begin by understanding the definition of a hormone. A hormone is a type of signaling molecule produced by glands in multicellular organisms that is secreted into the bloodstream to regulate physiology and behavior.
Step 2: Analyze the options provided in the question. Each option describes a different type of biological molecule or function.
Step 3: Eliminate incorrect options by matching their descriptions to known biological functions. For example, 'A structural component of the plasma membrane' refers to molecules like phospholipids or proteins, not hormones.
Step 4: Consider the correct description of a hormone: 'A chemical messenger that is secreted into the bloodstream and acts on distant target cells.' This matches the definition of a hormone, as it is involved in signaling and communication between cells.
Step 5: Confirm that none of the other options (e.g., 'A molecule that stores genetic information' or 'A protein that catalyzes biochemical reactions within the cell') align with the definition of a hormone. These describe DNA and enzymes, respectively, not hormones.
관련 영상
관련 실천
