What is the primary function of a stretch reflex? The stretch reflex (myotatic reflex), or more accurately “muscle stretch reflex”, is a muscle contraction in response to stretching within the muscle. The reflex functions to maintain the muscle at a constant length. What do stretch receptors do? muscle systems …has important sensory structures called stretch […]
Which element has no electrical charge at all?
Which element has no electrical charge at all? Answer: Atoms of all elements – except for most atoms of hydrogen – have neutrons in their nucleus. Unlike protons and electrons, which are electrically charged, neutrons have no charge – they are electrically neutral. What is a subatomic particle with a positive charge? The nucleus contains […]
What is the electromagnetic spectrum simple definition?
What is the electromagnetic spectrum simple definition? Electromagnetic spectrum, the entire distribution of electromagnetic radiation according to frequency or wavelength. The electromagnetic spectrum comprises the span of all electromagnetic radiation and consists of many subranges, commonly referred to as portions, such as visible light or ultraviolet radiation. What is the electromagnetic spectrum and why is […]
Do standing waves carry energy from one area to another?
Do standing waves carry energy from one area to another? Standing waves may be created from two waves (with equal frequency, amplitude and wavelength) travelling in opposite directions. Unlike the travelling waves, the standing waves do not cause a net transport of energy (because the two waves which make them up are carrying equal energy […]
What were the first hominins?
What were the first hominins? australopithecines What four characteristics define a hominin? Some characteristics that have distinguished hominins from other primates, living and extinct, are their erect posture, bipedal locomotion, larger brains, and behavioral characteristics such as specialized tool use and, in some cases, communication through language. What are 5 types of hominids? In this […]
What is the difference between a supersaturated solution and a saturated solution?
What is the difference between a supersaturated solution and a saturated solution? A saturated solution contains the maximum amount of solute that will dissolve at that temperature. Any further addition of solute will result in undissolved solid on the bottom of the container. A supersaturated solution contains more than the maximum amount of solute that […]
What are two things that might affect an ecosystem?
What are two things that might affect an ecosystem? Wind, rain, predation and earthquakes are all examples of natural processes which impact an ecosystem. Humans also affect ecosystems by reducing habitat, over-hunting, broadcasting pesticides or fertilizers, and other influences. What can disrupt an ecosystem? Disruptions to Ecosystems Wildfires. Fire is a common disruption to ecosystems […]
What task requires the most work lifting a 50 kg sack 2 meters or lifting a 25 kg sack 4 meters?
What is the density of dark matter in our galaxy?
What is the density of dark matter in our galaxy? The dark matter density near the solar system, from what I could find, sits at around 0.006 solar masses per cubic parsec, which is a set of units that’s not going to make much sense unless you’re a professional astrophysicist. This is extremely low density. […]
What is it important to prepare a good bacterial smear?
What is it important to prepare a good bacterial smear? The preparation of a smear is required for many laboratory procedures, including the Gram-stain. The purpose of making a smear is to fix the bacteria onto the slide and to prevent the sample from being lost during a staining procedure. A smear can be prepared […]