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Ulises Baeza
SCI221 Human Physiology
| Question | Answer |
|---|---|
| What is the primary function of a negative-feedback control system? | It opposes a change. |
| What is the primary effect of a positive-feedback control system? | It accelerate a change. |
| What are the types of lipids that form hormones, such as cortisone, estrogen, and testosterone? | Steroids. |
| During which stage of mitosis do the centrioles move to the opposite poles of the cell? | Prophase |
| How does water move through the cell membrane? | By osmosis. |
| What are the functions of epithelial tissue? | Protect the body from injury, absorb nutrients, secrete substances, and filter fluids. |
| What are the four elements of proteins? | carbon, oxygen, hydrogen, and nitrogen. |
| what is a allosteric effector? | A molecule or other agent that alters enzyme function by changing its shape. |
| Muscle contractions will continue as long as what condition is met? | The calcium ions are attached to the troponin. |
| During inspiration, what flattens to increase the size and volume of the thoracic cavity? | The diaphragm |
| What are the three phases of a twitch contraction? | The latent period, contraction phase, and relaxation phase. |
| The contraction of the uterus during the birth of a baby is an example of what type of feedback mechanism? | Positive feedback |