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Bio 130 - Anatomy & Physiology I Test 3 practice questions 1. Cells that break down the bone’s matrix to raise blood calcium levels are called: a. osteoclasts d. osteoporosis b. osteoblasts e. osteoprogenitor cells c. osteocytes 2. What layer contributes to 2/3 of the of epidermis : a. stratum corneum d. dermis b. stratum germinativum e. subcutaneous c. stratum lucidium 3. Adipose cells are found in the: a. papillary layer d. epidermal layer b. hypodermal layer e. none of the above c. reticular layer 4 A person that has 3rd degree burns over 30% of their body is considered to be in? a. Stable condition b. Critical condition c. Damage is localized to the epidermis d. Sensory reception is preserved e. None of the above 5. Schwann cells: a. are in PNS b. produce myelin c. wrap around individual sections of axons d. all of the above e. none of the above 6. The protein responsible for waterproofing and resilience of the skin is: a. melanin d. langerhan b. keratin e. elastin c. collagen 7. During an action potential the membrane first becomes more permeable to? a. sodium d. potassium b. hydrogen e. chloride c. calcium 8. What kind of gland is most active during normal sweating? a. merocrine d. apocrine b. Ceruminous e. none of the above c. Mammary glands 9. When assessing a person’s skin a bluish tinge often on the lips might indicate the person is: a. not getting enough oxygen . b. has broken blood vessels under the surface of the skin c. is a response to cool the body off. d. None of the above e. All the above 10. When assessing a mole you should look at: a. asymmetry b. border c. diameter d. color e. all the above 11. Skin is very red and sensitive to the touch were blisters have not formed is classified s? a. first degree d. 4th degree b. second degree e. none of the above c. third degree 12. What bones are considered part of the axial skeleton? a. femur b. humerus c. skull d. iliac( hip) e. none of the above 13. A vertebra would be considered a/an a. Irregular bone b. Short bone c. Long bone d. Flat bone e. None of the above. 14. What type of cartilage is located in the intervertebral disc and meniscus of the knee? a. Elastic b. Hyaline c. fibrocartilage d. none of the above e. all of the above 15. If a persons blood calcium levels start to rise what cells will become active? a. Osteoblast b. Osteocyte c. Osteoclast d. Osteogenic e. None of the above 16. What classification of joints allows for the greatest range of motion? a. synovial b. fibrous c. cartilaginous d. all provide equal motion e. none allow for motion 17. The most important time to get calcium in your diet to develop strong bones is between the years of: a. 10-20 b. 15-25 c. 20-30 d. 30-40 e. 40-50 18. What condition affects older people making their bones weaker and more likely to fracture? a. osteoporosis b. osteomalacia c. osteosarcoma d. osteogenic e. osteoarthritis 19. Which statement is true? a. Na is more concentrated outside of the neuron b. K is more concentrated outside of the neuron c. Na will move out of the cell by diffusion d. K will move into the cell by diffusion. e. None are true 20. When an axon reaches threshold: a. potassium ions rapidly enter the cell b. permeability to both potassium and sodium ions decreases c. initially sodium ions rapidly enter the cell d. initially chloride ions leave the cell e. ionic movement ceases 21. During its absolute refractory period, a membrane's sensitivity to stimulation is: a. insensitive b. hypersensitive c. normally sensitive d. very sensitive 22. The space between two neurons is the: a. terminal button d. acetylcholine b. interneuron e. synaptic bulb c. synaptic cleft 23. A bone that’s height is greater then width is most likely a(n): a. long bone d. irregular bone b. short bone e. sesamoid bone c. flat bone 24. Saltatory conduction is: a. characteristic of myelinated neurons b. decreases speed of conduction c. increases speed of conduction d. a and b of the above e. a and c of the above 25. Which of the following statements is true? a. Schwann cells produce myelin in the CNS b. Oligodendrocytes produce myelin in the CNS c. Oligodendrocytes can myelinate only 1 fiber at a time d. a schwann cell myelinate many fibers e. none of the above are true 26 . A canaliculus of compact bone contains A. nerves. B. blood vessels. C. an abundance of collagen fibers. D. a process of an osteocyte. E. mainly hydroxyapatite. 27. A fracture where the bone breaks through the skin is a A. colles. B. pott. C. comminuted. D. greenstick. E. compound 28. Which of the following are not characteristic of graded potentials? A. they are considered sub-threshold stimulus. B. they are of variable voltage. C. they are sometimes inhibitory. D. they obey the all-or-none law. E. they spread only short distances from the point of stimulation. 29. Nerve signals A. travel fastest in small unmyelinated fibers. B. travel fastest in large unmyelinated fibers. C. travel fastest in small myelinated fibers. D. travel fastest in large myelinated fibers. E. travel at the same speed in all nerve fibers. 30. The fastest rate of mitosis is seen in A. the stratum corneum. B. the stratum lucidum. C. the stratum granulosum. D. the stratum spinosum. E. the stratum basale 31. Which of the following is an epidermal cell functions as a macrophage? A. a keratinocyte B. a melanocyte C. a plasma cell D. a Langerhans cell E. a Merkel cell 32. If a person has a disease that affects the Oligodendrocytes may: A. have a problem with nerve conduction B. can affect multiple neurons C. will affect individual neurons D. A and B E. A and C 33. IPSP will result in the opening of: A. Na gates B. K gates C Ca gates D. Mg gates E. all of the above 34. Multiple Sclerosis is a disease that primarily effects the brain and spine cord. It is a demyelinating disease that damages nerve conduction of many fibers. What cells does it primarily affect? A. Oligodendrocytes B. schwann cells C. Neural Glia D. Astrocytes 35. Glial cells are involved with? A. Involved in providing nutrition to neurons B. Maintaining the environment for neurons C. Guide young neurons to the proper connections D. a and b E. all of the above.