How big is the human heart?
A. The size of the palm of your hand.
B. The size of your outstretched hand.
C. The size of your closed fist.
D. The same size as a horses heart.
Topics:Human Muscle Viruses Macromolecules & Enzymes Cell - Fundamental Unit of Life CNA Introduction Cell Diversity - Organization, Tissues, Plants and Animals Psoriasis Meiosis and intro to Genetics Health and Diseases Health - Nutrition Cancer (Bio II) Population Ecology Stress Cell Division PHE Healthy Lifestyle
Other quiz: Thyroid and Intro to Endocrinology
Secreted in endocrine cells and remains in relation to plasma membrane; acts on immediately adjacent cell by direct cell-to-cell contact