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Yajari Platero
Human Physiology with lab 2025 week 1-7
| Question | Answer |
|---|---|
| Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? | intracellular regulation |
| The impact of effector activity on sensors may be positive or negative. Therefore, homeostatic control mechanisms are categorized as | organs that are directly influenced by physiological variables or mechanisms. |
| Homeostasis can best be described as: | adaptation to the external environment. |
| If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions? | Oxytocin would inhibit uterine contractions. |
| Epidemiology is the study of the _____ of diseases in human populations. | distribution |
| Intrinsic control: | is sometimes called autoregulation. |
| A triglyceride is composed of a glycerol molecule and three of the same type of fatty acid. | False |
| A _____ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | free radical |
| 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. |
| Two solutions of different concentrations of glucose are separated by a membrane that allows both glucose and water to pass through. When dynamic equilibrium is reached, there will be: | an even exchange of material across the membrane. |
| In which skin layer does the process of keratinization begin? | Stratum granulosum |
| Which of the following vitamins is(are) absorbed through the skin? | Vitamin A , Vitamin D , Vitamin K |
| What is are the two types/functions of bone marrow? | Red & yellow – produces red blood cells and stores energy as fat. |
| that best describes the axial skeletal structure. | Supports and protects organs and Provides framework for muscles that anchor and stabilize the appendicular bones |
| Young children’s bones have a greater risk of fracturing because of incompletely ossified bone. | False |
| The muscle’s ability to stretch or extend and to return to its resting length is called | extensibility. |
| 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 |
| The largest and most frequently injured joint is the | knee |
| Which membrane receptor acts to directly change ion permeability when stimulated? | Gated-channel receptor |
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