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Shannon Hiatt
Anatomy Study Stack chapters 1-5
| Question | Answer |
|---|---|
| What is negative feedback? | Negative feedback control systems are inhibitory. They oppose or negate a change by creating a response that is opposite in direction to the initial disturbance. |
| What is positive feedback? | Positive feedback control systems are stimulatory. Instead of opposing a change in the internal environment and causing a return to normal, positive feedback tends to amplify or reinforce the change that is occurring. |
| What is intrinsic control? | Means "inside" control. Operate at the tissue and organ levels. Often make use of chemical signals. |
| What is extrinsic control? | Means "outside" control. Operate at the system and organism levels. The never signals and hormones originate outside the controlled organ. |
| What are the four major elements? | Carbon Oxygen Hydrogen Nitrogen |
| A chemical bond formed by the sharing of one or more pairs of electrons between the outer energy levels of two atoms is: | a covalent bond |
| A network of canals and sacs extending from the nuclear envelope and may have ribosomes attached. | Endoplasmic Reticulum (ER) |
| Stack of flattened sacs (cisternae) surrounded by vesicles. | Golgi Apparatus |
| Tiny membranous capsule surrounding an inner highly folded membrane embedded with enzymes, has small, ringlike chromosome. (DNA) | Mitochondria |
| Small particles assembled from two tiny subunits of rRNA and protein. | Ribosomes |
| Standing or staying the same; constancy of the body's internal fluid environment | Homeostasis |
| What is the "set point"? | Normal reading or range of normalcy in the body. |
| What are "effectors"? | Organs, such as muscles or glands that directly influence controlled physiological variables. |
| Mechanisms that regulate functions within the cell, often by means of genes and enzymes. | Intracellular control |
| How many elements naturally occur on earth? | 92 |
| Atoms with fewer than eight electrons in the outer energy level will attempt to lose, gain or share electrons with other atoms to achieve stability. | Octet rule |
| What are Isotopes? | An element containing the number of protons, but different number of neutrons. |
| A chemical bond formed by the transfer of electrons from one atom to another is called: | Ionic or electrovalent bonds |
| How many layers of strata does the epidermis have? | 5 layers. Basale Spinosum Granulosum Lucidum Corneum |
| How many bones are in the human body? | 206 |
| What is the largest organ? | Skin |
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Shannonhiatt01
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