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SCI221 Midterm

Content from Weeks 1- 6

QuestionAnswer
What are the four major groups of organic molecules? carbohydrates, lipids, proteins, and nucleic acids
A triglyceride is composed of a glycerol molecule and three of the same fatty acids
Thermoregulation is an example of which homeostatic mechanism? Negative feedback loop
The process through which a cell engulfs and destroys large particles is called phagocytosis
Which phase of mitosis involves chromosomes moving to opposite ends of the cells along the spindle fibers? anaphase
a molecule or other agent that alters enzyme function by changing its shape is called allosteric effector
The term diploid refers to how many chromosomes? 46
In a DNA molecule, a sequence of three base pairs is called a(n) codon
Which skin layer appears prickly due to the desmosomes that join the cells together? stratum spinosum
Apocrine glands can be found in which areas of the body? armpit, areolae of the breast, pigmented skin areas around the anus
Which skin layer begins the process of keratinization? Stratum granulosum
What are the two types/functions of bone marrow? Red - produce red blood cells Yellow - stores energy as fat
Which areas can you find fibrous cartilage? pubic symphysis and intervertebral discs
The skeleton can be divided into two areas: Axial and appendicular skeleton
What are the three phases of twitch contraction? latent period, contraction phase, and relaxation phase
The contractile unit of a muscle fiber is called sarcomere
Which structure allows the electrical signal to travel along the sarcolemma and move deeper into the cell? Transverse tubules
As the electrical signal travels down the T-tubules, it signals the release of ____ from the sarcoplasmic reticulum. calcium (Ca ++) ions
Created by: hsg701
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