Complete each statement describing microvilli, cilia, pseudopods, and flagella b

Question

Complete each statement describing microvilli, cilia, pseudopods, and flagella by dragging a label into the pseudopods flagellum small intestine nonmotile primary cilium microvilli uterine tubes motile cilia Cells used for absorption typically utilize _____ to maximize surface area. Nearly every human cell has a single _____ whose function is not completely understood. In humans, only the male gametes posess a _____ The brush border of the _____ is comprised of microvilli. The movement of mucus, egg cells, and cerebrospinal fluid is caused by the wave-like beating of _____ across the cells' surface. Macrophages reach out with thin filamentous _____ to snare bacteria and cell debris and "reel them in" to be digested by the cell

Explanation / Answer

1. Cells used for absorption typically utilize microvilli to maximize surface area (microvilli are finger like protrusion that enhance the surface area several folds for maximum absorption of nutrients).

2. Nearly every human cell has a non motile primary cilium whose function is not completely understood (recent researches have stated that these are mechanosensory organelle that project from apical membrane of most cells. They regulate cell size and cell division by transmitting extracellular signals into intracellular biochemical responses.)

3. In humans only the male gametes posess a flagellum. ( the motile human sperm (male gamete) move via flagellum to reach the female egg for the process of fertilization. This uniflagellated sperm cell is referred to as spermatozoa).

4. The brush border of small intestine is comprised of microvilli (Plicae circulares is the mucous membrane, several folds of which line the inner wall of small intestine. the surface of these folds contain several tiny projections called villi and microvilli. Their purpose is to enhance the surface area to facilitate maximum absorption of nutrients in gut.)

5. The movement of mucus, egg cells and cerebrospinal fluid is caused by wave like beating of motile cilia across the cell surface (motile cilia facilitate large scale fluid flows, as mucus CSF and propulsion of egg, but the need to be propoerly oriented to tissue axes, and have coherence with respect to direction of flow.)

6. Micrphages reach out with thin filamentous pseudopods to snare bacteria and cell debris and "reel them in" to be digested by the cell (macrophages are type of white blood cells that engulf bacteria or cellular debris by the process of phaggocytosis. Phagocytic receptors bind to target particles and this induces the development of F-actin enriched pseudopods that engulf the target into phagocytic cup for further degradation of the same).

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