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SCI-221 Week 1-6
Physiology week 1 - 6 flashcards
| Question | Answer |
|---|---|
| Effectors can be described as: | organs that directly influence controlled physiological variables |
| Negative Feedback | Inhibitory response stabilizing physiological variables |
| Positive Feedback | Stimulatory response amplifying changes |
| All proteins have which four elements? | carbon, oxygen, hydrogen, and nitrogen |
| In base pairing of DNA molecules, _____ is bound to _____. | adenine; thymine |
| Humans can synthesize 13 of 21 basic amino acids; the remaining 8, which must be included in the diet, are called: | essential amino acids |
| Diffusion of particles through a membrane by means of a carrier molecule is called: | facilitated diffusion |
| A saline solution that contains a higher concentration of salt than a red blood cell would be: | hypertonic |
| The correct order of the phases of mitosis is: | prophase, metaphase, anaphase, telophase |
| Which cells of the skin are filled with a tough, fibrous protein and account for most of the epidermal cells of the skin? | Keratinocytes |
| In which skin layer does the process of keratinization begin? | Stratum granulosum |
| Which skin layer contains closely packed, clear cells that contain a gel-like substance called eleidin? | Stratum lucidum |
| Which skin layer has cells that look prickly because of the desmosomes that join the cells together? | Stratum spinosum |
| Which skin layer is called the barrier area? | Stratum corneum |
| Bones grow in length due to activity in the ________. | epiphyseal plate |
| Adipocytes, found in the yellow bone marrow, stores and releases ____________________________ for energy. | fat and triglycerides |
| The cells responsible for active erosion of bone minerals are called: | osteoclasts |
| Which structure allows the electrical signals to travel along the sarcolemma and move deeper into the cell? | transverse tubule |
| The four kinds of protein that make up myofilaments are myosin, actin, ____________, & _______________ | tropomyosin and troponin |
| The energy required for muscular contraction is obtained by hydrolysis of _________ | ATP |
| Three phases of the twitch contraction are the | latent period, contraction phase, and relaxation phase |
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brennab1111