Answer:
Explanation:In physiology, a stimulus is a detectable change in the physical or chemical structure of an organism's internal or external environment. The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity. Sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanoreceptors. When a stimulus is detected by a sensory receptor, it can elicit a reflex via stimulus transduction. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level of strength must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.
Answer:
With the aging of the joints, wear on them occurs. The most affected joints are those with greater mobility and weight support, such as the knee, shoulders and elbows. The changes that occur most are:
- decrease in synovial fluid.
- reduction of intra articular space.
- joint stiffness.
The joint becomes arthrosic, that is to say a worn joint, which will manifest itself with pain, functional limitation and inflammation.
Answer:
Yes, eating carrots can assist enhance eyesight under specific circumstances. Vitamin A is produced by the body using beta-carotene, and "vitamin A is extremely vital."
Explanation:
Carrots are high in beta-carotene, a substance that the body uses to make Vitamin A, and they can help lower cholesterol and, yes, improve vision. Vitamin A aids in the conversion of light into a signal that is conveyed to the brain, helping you to see more clearly in low light.
As the strength has halved, you will double the drops - so 4 drops will be administered at each dose
Answer:
The most correct answer is: It varies in consistency based on the amount of protein fibers and fluid
Explanation:
The extracellular matrix (ECM) is the environment surrounding cells, which is normally composed by fibers (i. e.: collagen, elastin, etc...), soluble proteins and other macromolecules (such as hyaluronic acid) embedded in fluid. The relative concentration and composition of those components conditions, among other things, the physical consistency of the ECM.
- No blood vessel arises from ECM; they derive from specific precursor cells. Additionally, cartilage is an avascular (has no blood vessel) type of connective tissue.
- ECM does provide oxygen and nutrients to diverse tissue, including bone, however bone tissue <em>does</em> have blood vessels.
- Neuronogenesis (generation of new neurons) takes place within the developing nervous system, with neuronal precursor cells being thoroughly surrounded by other cells such as radial glia. Typically, neighboring ECM has a minor or negligible role in this process.
