Answer:
The structure of the cell is very much linked with the functions of the cell.The cardiac muscle is made of myocardium which serves the body by providing the blood, nutrients and oxygen.The cardiac muscles appears stripped when seen under microscope.
The skin consists of the tissues and cells which are close enough to create a boundary which does not allows the entry of materials and pathogens inside the body.
Hence, the function and the morphology of the cells are somewhere related to each other.
Answer:1)Temperature 2)Wind 3)Humidity 4)Light:plants tend to transpire more rapidly in light than in the dark.
Explanation:
Answer:
1. The offspring will be all tall pea plants
2. 3:1 is the ratio for tall and short
Psychic stimulants include caffeine, cocaine, and various amphetamines. These drugs are used to enhance mental alertness and reduce drowsiness and fatigue.
Answer:
True
Explanation:
Some deviations from normal homeostasis activate the positive feedback loops to control the conditions which are otherwise regulated by negative feedback mechanisms.
For example, the blood levels of respiratory gases and H+ ions are regulated by a negative feedback system via chemoreceptors. The increased partial pressure of carbon dioxide gas and lowered pH or lowered partial pressure of oxygen in the blood are sense by central and peripheral chemoreceptors which in turn activate the neurons of the dorsal respiratory group (DRG).
The activated DRG triggers an increased in the rate and depth of the breathing to facilitate the inhalation of more oxygen and exhalation of CO2 to restore the normal levels.
However, hypocapnia inactivates the chemoreceptors and does not allow negative feedback to restore the normal CO2 levels in the blood.
Under such conditions, the positive feedback loop stimulates the DRG neurons more strongly in response to the increased partial pressure of CO2 above the normal levels than when the partial pressure of oxygen falls below the normal level. These dangerously lowered oxygen levels may also cause fainting.
