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Vidal Castañeda
SCI221- HUMAN PHYSIOLOGY
| Question | Answer |
|---|---|
| Of the pathogenic organisms, which of the following are the most complex? | Tapeworms |
| Of the 11 major body systems, which is the least involved in maintaining homeostasis? | Reproductive |
| Because negative feedback control systems oppose changes that are opposite in direction to the initial disturbance, they are | slowed or maintained in the homeostatic range |
| A _____ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | free radical |
| Which of the following is not true of both triglycerides and phospholipids? | They both contain a hydrophobic and hydrophilic end |
| The term glycoprotein, a combination of two words, tells you that the compound is made of _____, with _____ being the dominant component. | carbohydrate and protein; protein |
| When two molecules of glucose are joined, they form which disaccharide? | Maltose |
| Which lipid is part of vitamin D? | steroids |
| Prostaglandins and steroids share which of the following characteristics? | Both have a ring structure in their molecule. |
| Which of the following is not true of RNA? | It contains ribose sugar. It contains adenine. It is composed of smaller molecules called nucleotides. All of the above are true of RNA. |
| RNA and DNA have the same pyrimidine bases but different purine bases. | false |
| A saturated fatty acid is one in which | all available bonds of its hydrocarbon chain are filled. |
| The lipid that is often referred to as a tissue hormone is | prostaglandin. |
| A very large molecule composed of subunits of sugar, a nitrogen base, and a phosphate bond is a | nucleic acid. |
| What determines how a protein performs? | shape |
| A triglyceride is composed of a glycerol molecule and three of the same type of fatty acid. | FALSE |
| Which of the following statements is true? | The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm. |
| Which is not true about the sodium and potassium pump? | Sodium moves into the cell and potassium moves out of the cell. |
| Osmosis can be defined as | the net movement of water molecules from a region of lower solute concentration to a region of higher solute concentration. |
| Diffusion moves | down a concentration gradient. |
| If red blood cells containing 10% solute are placed in a solution containing 10% solute, what will happen? | Water will move into and out of the cells at equal rates. |
| Which tissue is most likely to form a keloid scar as it heals? | Connective |
| Which of the following is not a characteristic of epithelial tissue? | Is important in communication and control |
| Which of the following is not a proteoglycan found in the matrix of connective tissue? | Collagen |
| The papillary layer of the dermis: | produces the ridges that make fingerprints |
| Fingernail growth is the result of the mitosis of the cells in the stratum: | germinativum |
| In which skin layer does the process of keratinization begin? | Stratum granulosum |
| Young children’s bones have a greater risk of fracturing because of incompletely ossified bone | FALSE |
| The cell organelles that synthesize organic matrix substances in bone formation are: | endoplasmic reticulum and Golgi apparatus. |
| The external portion of the bone is known as | Cortical bone |
| Why is cartilage slow to heal | Because it is semi-solid and flexible. Because has a no or a limited blood supply |
| Which of the following is a location in which you would find fibrous cartilage | Public symphysis Interverbal discs |
| Select the answer that best describes the axial skeletal structure. | Provides framework for muscles that anchor and stabilize the appendicular bones |
| A gliding joint is an example of a(n) _____ joint. | multiaxial |
| Aerobic respiration: | produces the maximum amount of energy available from each glucose molecule. |
| All of the following are true characteristics of an isometric contraction except | the muscle does not shorten. it can produce work by tightening to resist a force. the tension produced by the myosin cross-bridges cannot overcome the load placed on the muscle. (THIS IS NOT TRUE)movement is produced. |
| Which type of muscle is responsible for peristalsis? | Single-unit smooth |
| The shoulder joint is an example of a _____ joint. | multiaxial: freely movable: ball and socket |
| Muscle tone is maintained by | negative feedback mechanisms |
| The more muscle fibers contracting at the same time, the stronger the contraction of the entire muscle. The number of muscle fibers contracting depends on how many motor units are | recruited |
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