Concept explainers
Introduction:
The different levels of the body organization are described below:
Chemical level:
The chemical levels of the organization include the atoms and the molecules, that combine together in an arranged manner to form a cell as well as all the body structures.
Cells:
The cells are the basic functional and structural unit of life. An organism can have either a single cell or multiple cells. If something lacks cellular organization, they cannot be considered as living. A cell is capable of performing all the functions essential for life.
Tissue:
The tissue is the group of cells performing similar functions and hasthe same structure. In a multicellular organism, they perform a particular role inthe maintenance of normal physiology.
Organ:
Many tissues together form organs. The organs are the cluster of tissues which perform a self-contained and self-vital function. Different tissues in the organs perform a different function, which is essential to carry out various physiological processes.
Organ system:
The organ system is the group of organs, which is involved in carrying out a specific physiological process. For example,the
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Human Physiology: From Cells to Systems (MindTap Course List)
- Although your body systems interact to keep you healthy, sometimes problems can prevent them from working properly. Choose any disorder or disease (contagious, inherited, age-related, or otherwise) and describe how it can disrupt the human body’s normal function, including the systems, organs, cells, molecules, and/or processes involved.arrow_forwardPlace the following in order of how they happen in the body.arrow_forwardHomeostasis involves maintaining Select one: a. body conditions outside the normal range b. a relatively constant internal environment in the body c. the external environment to accommodate the body's needs d. the body in a fixed, unchanging statearrow_forward
- Homeostasis is the combination of two Greek words that mean body and systems. A. True B. Falsearrow_forwardThe body has and maintains homeostasis through the working together of 11 of which of the following A. tissue types B. organs C. specialized cells D. organ systemsarrow_forwardLivor mortis is considered to be: A. Stiffening of the body's muscles B. An antemortem temperature change of the body C. Tissue flaccidity D. A postmortem intravascular discolorationarrow_forward
- Homeostasis a. is a dynamic process. b. describes the maintenance of the internal environment of the body. c. is essential to life. d. All of the choices are correct.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Structure and function are closely related at the organ level only. b. Homeostasis is the condition of having a dynamic equilibrium of the internal environment. c. Positive feedback loops are triggered by a deviation from a homeostatic set point and are shut down when conditions return to the set point. d. The effects of negative feedback loops are amplified to create an escalating response. e. Cell-cell communication is required to coordinate the activities of the whole bodyarrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Histology is the division of microscopic anatomy that studies the cellular level of organization. b. All living organisms are composed of one or more cells. c. Living organisms react to changes in their environment known as stimuli. d. The anatomical position features the person facing forward, feet shoulder width apart, and palms facing posteriorlyarrow_forward
- Why do healthcare professionals divide the body into different planes and regions? A. In medicine, a few regions are more important than others. B. So they can determine which type of medical specialist to inform. C. It helps describe specific locations of pain, discoloration, or injury. D. Each area is tied to a specific kind of medicine. (e.g you can’t use morphine in the iliac)arrow_forwardWhich of the following statements best describes homeostasis? a. Keeping the body in a fixed and unaltered state b. Dynamic equilibrium c. Maintaining a near-constant internal environment d. Altering the external environment to accommodate the body's needsarrow_forwardc) A patient has a CT scan of their abdomen with an absorbed dose of 25.0 mGy. The scan ends near the top of their pelvis. Assume that 15% of their bone is scanned, 20% of their skin, 90% of their colon, 25% of their bladder and 10% of their lungs but none of their liver, stomach and gonads. A further 20% of tissue characterised as 'remainder of the body' is also exposed during the scan. The tissue weighting factors for various organs is listed in the table below: Tissue Tissue weighting Tissue Tissue weighting factor factor skin 0.01 oesophagus 0.04 bone marrow 0.12 bladder 0.04 bone surface 0.01 breast 0.12 brain 0.01 gonads 0.08 lung 0.12 thyroid 0.04 liver 0.04 salivary glands 0.01 stomach 0.12 remainder of body 0.12 colon 0.12 What is the overall effective dose received by the patient from the CT scan?arrow_forward
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