Answer: Human use of land has negative impacts. Human activities contribute to the erosion and pollution of beaches. ... More of the rainwater runs off leading to increased erosion and drier soil. Deforestation of land can also lead to desertification and a loss of biodiversity.
Explanation:
I think the answer is evolution.
C. More areas have polluted soil, reducing crop variety.
It literally tells you right there, though.
Answer:
The correct answer will be- the major part of its makeup is adipose, which serves as an effective shock absorber.
Explanation:
The hypodermis is the innermost layer of the skin close to the muscles also known as the subcutis layer.
The subcutis layer is the is made up of fat and collagen which both help the layer to act to conserve the body's heat and also act as a shock absorber which protects the inner organs.
Since the layer contains three types of cells mainly adipose cells, macrophages and fibroblasts where adipose help absorb the shock therefore, the selected option is the correct answer.
The right answer is: voltage-gated channels
Ionic channels are membrane proteins that allow the selective passage of the cell membrane by ions (Na +, Ca2 +, K +, Cl-, ...) following the electrochemical gradients. They play a vital role in cellular excitability, triggering and propagation of action potential. They intervene in the coupling excitation-contraction and excitation-secretion. Ion channel selectivity is based on the adequacy of ion size and charges with the structure and amino acid sequence of the channels.
Among these channels, there are voltage-gated channels.
These are ion channels whose opening is activated by the membrane potential.
These dependent volumetric channels are characterized:
- by the selectivity of the ions (Ca2 +, Na +, K +, Cl-, ...)
- by their conductance
- by their activation domain (significant depolarization to low)
- by their kinetics of inactivation (slow, fast or transient)
