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SCI 221 Part I
| Question | Answer |
|---|---|
| The structure of the knee joint permits movements of_____ | flexion and extension |
| A contraction in which muscle length remains the same but muscle tension increases | isometric contraction |
| Muscle tone is maintained by ____ | negative feedback mechanism |
| Sliding filament theory | actin moves past myosin |
| Pillow-like structure in some synovial joints | bursa |
| The minimal level of stimulation required to cause a fiber to contract _____ | Threshold stimulus |
| Why is cartilage slow to heal? | Because it is semi-solid and flexible and has a no or a limited blood supply |
| Axial skeletal structure | Provides framework for muscles that anchor and stabilize the appendicular bones |
| Epiphyses characteristics | Cylindrical in shape |
| Diaphysis characteristics | Hollow, composed of compact bone |
| Epiphyseal plate | a layer of cartilage (epiphyseal plate) remains between the epiphysis and diaphysis |
| Lumbar Vertebrae | Vertebral bones that support the small (lower section) of the back |
| Very small bone that lies just posterior and lateral to each nasal bone | lacrimal |
| Location of zygomatic bone | Facial bone |
| What is intrinsic control aka | autoregulation |
| A structural lipid found in the cell membrane is _____ | phospholipid and steroid |
| RNA makes proteins by ____ | translation |
| the result of meiosis is ____ | four daughter cells that are haploid |
| S phase | replication of DNA occurs during this phase of interphase |
| Which cells form the blood-brain barrier that protects the brain from harmful substances in the blood? | Astrocytes |
| Proteoglycan found in the matrix of connective tissue | Glucosamine, hyaluronic acid |
| Mesenchyme | connective tissue forms from stem cell tissue |
| Which tissue is most likely to form a keloid scar as it heals? | connective |
| Which cells electrically insulate axons to increase the speed of conduction? | Oligodendrocytes and Schwann cells |
| What layer is the hair follicle is found _____ | dermis |
| Apocrine sweat glands can be found ____ | armpits, areolae of the breasts, pigmented skin areas around the anus. |
| In which skin layer does the process of keratinization begin? | stratum granulosum |
| Which is characteristic of the epiphyses? | made of spongy bone, contain red bone marrow |
| Which of the following is characteristic of the diaphysis? | Hollow, composed of compact bone |
| What is are the two types/functions of bone marrow? | Red & yellow- produces red blood cells and stores energy as fat. |
| The first event to occur in muscle relaxation is that: | the sarcoplasmic reticulum begins actively pumping calcium back into its sacs |
| Which joint allows for a unique movement called opposition? | Saddle |