Holes Human Anatomy & Physiology- CH. 3 Exam with Correct Solutions 2024

Holes Human Anatomy & Physiology- CH. 3 Exam with Correct Solutions 2024 An adult human body consist of how many cells? - Answer -50 to 100 trillion Describe three types of differentiated cells. - Answer -Nerve cells- long threadlike extensions that transmit motor/sensory information Muscle Cells- Slender and rod like which move parts of body Epithelial Cells- simple squamous, thing and flat for gas exchange Distinguish between the cytoplasm and the cytosol of a cell - Answer -Cytoplasm- composed of cytoplasmic organelles suspended in liquid called cytosol. Cytoplasm surround nucleus and contained in cell membrane. Explain the general function of organelles - Answer -Organelles divide labor in cell by partitioning off certain areas/providing specific functions--dismantling debris or packaging secretions Define Selectively permeable - Answer -Cell membrane allows substances to pass easily whole excluding others Describe the structure of a cell membrane and explain how its structural organization provides the membranes function. - Answer -Structure of cell membrane consist of phospholipid bi layer. Contains embedded protein molecules. Functions to keep inner portion of cell intact. Controls entrance/exit of substances. Three functions of membrane proteins - Answer --Acting as a receptor to combine w/ specific substances like hormones, some form narrow passageways/channels, which various molecules/ions can cross the cell membrane. Other function as enzymes in signal transduction State a way cellular adhesion is essential to health; and a way the abnormal cellular adhesion harms health. - Answer -Cellular adhesion enables cells to aggregate to form tissues can also assist the immune system in recognizing self and non-self cell surfaces. Abnormal cellular adhesion could indicate a potential threat to health. Distinguish between organelles and inclusions - Answer -Organelle is a structure within the cytoplasm with specific functions. Inclusions are masses of lifeless chemicals such as pigments or glycogen