1. Some substances passes through small holes in the surface cell membrane. This is called diffusion and does not require cell to expend energy.In this way the passive transport occur if the cell doo not expend any energy. 2.In active transport,the particles move across the cell membrane from slower concentration to higher concentration . Active transport is the energy requiring process of pumping molecules and ions across membranes uphill against a gradient.This process uses the energy of ATP. 3. Endocytosis and Exocytosis are important mechanisms for bringing substances into and out of a cell.The vesicles fuse with the plasma membrane ,causing the contents of the vesicles to spill outside the cell.
And says "having been commissioned of Jesus Christ"
Answer: Golden jackals, Tree frogs etc.
Explanation: Tree frogs use plants as protection. Golden jackals, once they have been expelled from a pack, will trail a tiger to feed on the remains of its kills. Goby fish live on other sea animals, changing color to blend in with the host, thus gaining protection from predators
Question: A number of responses occur in the body to the release of neurohormones when the body encounters stress, including which of the following?
a. increase in appetite
b. decreased cerebral blood flow
c. decrease in awareness
d. inhibition of reproductive function
Answer:
A number of responses occur in the body to the release of neurohormones when the body encounters stress "inhibition of reproductive function"
Explanation:
Neurohormones in the mammals are oxytocin and vasopressin, both of them are produced by the hypothalamic region of the brain and then released into the blood by the help of neurohypophysis. Neurohormones are mostly the chemical messenger which are being released by the neurons, when they enter into the bloodstream from which they can travel to the target sites within body. The hypothalamus starts secreting the substances i.e. neurohormones when it receives the signal from the nervous system.
Answer:
B cells are at the centre of the adaptive humoral immune system and are responsible for mediating the production of antigen-specific immunoglobulin (Ig) directed against invasive pathogens (typically known as antibodies).
Explanation:
T cells are a part of the immune system that focuses on specific foreign particles. Rather than generically attack any antigens, T cells circulate until they encounter their specific antigen. As such, T cells play a critical part in immunity to foreign substances.