Lipids are macromolecules which provide insulation.
<span>A macromolecule is a large molecule. There are four groups of macromolecules: carbohydrates, proteins, nucleic acids and lipids. Lipids consist of glycerol and fatty acids and are constructed from fats, oils, waxes, phospholipids and steroids. A lipid's function is to insulate the body and provide warmth in cold conditions. It can be concluded that a person with very little body fat gets very cold easily and a person with a lot of body fat gets very warm very quickly.
</span>
The roots couldn’t reach the groundwater
Mucus in our noses and respiratory tracts trap microbes and pathogens from entering our body. Wax also trap pathogens and other foreign particles from entering our ears. Non-specific defenses are surface coverage defenses. T-cells target specific pathogens, which is a type of specific defense acted upon by our immune system.
Answer:
2. Hair cells depolarize through an influx of K+, while neurons depolarize through an influx of Na+
Explanation:
The complete question is as follows :
What is an important difference between neurons and hair cells?
1. Neurons detect pressure waves, and hair cells communicate the signal to the central nervous system (CNS).
2. Hair cells depolarize through an influx of K+, while neurons depolarize through an influx of Na+.
3. Neurons release neurotransmitters, but hair cells signal using hormones.
4. Hair cells are only found in the CNS, and neurons are only found in the peripheral nervous system (PNS).
- Neurons are the cells that are electrically excitable and play a role in transmitting the nerve impulses in the body.
- Hair cells are found in the ears of the vertebrate and these are the sensory receptors of the auditory and the vestibular system.
- For the neurons, it is the influx of the sodium ions that causes the membrane potential to become more positive and cause depolarization whereas in the case of the hair cells it is the influx of potassium ions that does so.
- This reason why the K+ ions move-in is because the surrounding fluid that is the endolymph is richer in K+ ions and does the movement of the endolymph causes the K+ channels to open and K+ influx occurs in the hair cells.
Answer:
a population is the entire pool from which a statistical sample is drawn. A population may refer to an entire group of people, objects, events, hospital visits, or measurements. A population can thus be said to be an aggregate observation of subjects grouped together by a common feature.