Answer:
A <u><em>receptor</em></u> is a protein that recognizes and responds to a signal.
Explanation:
A receptor is a protein molecule present on the cells on which the signalling molecules can bind and generate a physiological response. Some receptor molecules can also respond to Sun and light. Each type of cell has specific receptors molecules and hence can respond to specific signals. The receptor molecules hence tend to receive signals for a cell. Molecules such as hormones bind to the receptors.
Answer:
B. The heart beat and pulse rate may change, but are always equal.
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Answer;
-The body type, cell type, cell structure, nutrition
Explanation;
-There are six commonly accepted kingdoms. Each kingdom includes a set of organisms that share similar characteristics. The six Kingdoms are: Archaebacteria, Eubacteria, Fungi, Protista, Plants and Animals.
-Organisms are placed into these categories based on similarities or common characteristics. Some of the characteristics that are used to determine placement are cell type, nutrient acquisition, and reproduction.
-The two main cell types are prokaryotic and eukaryotic cells. Common types of nutrient acquisition include photosynthesis, absorption, and ingestion. Types of reproduction include asexual reproduction and sexual reproduction.
