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- What is mass transportation across the cell membrane?What is the function of Kupffer cells?While endocytosis and exocytosis refer to the direction in which a vesicle moves into and out of a cell respectively, it is important to think about what is being moved with and within the vesicles. To demonstrate how this process is utilized in human cells we will focus on the human body's insulin response. The purpose of the insulin response is to create a pathway for glucose entry into cells by releasing glucose transporters into the membrane. Cell Type #1- insulin producers: In humans, pancreatic B-cells create steroid insulin that can be packaged into vesicles starting at the ER. These vesicles are prepared for exocytosis so that the insulin can be released from the pancreatic B - cells and get into the bloodstream when signaled to do so. When glucose is present in the blood stream these cells will release the pre-packed insulin into the blood stream. Cell Type #2- insulin responders: Other cells do not produce insulin but instead respond when they have received the insulin signal…
- A cell contains 97% water and it is placed in a 5% salt solution. a) Which contains a higher concentration of water? i) cytoplasm of the cell ii) salt solution b) Which contains a higher concentration of solutes? i) cytoplasm of the cell ii) salt solution c) Cell membranes are selectively permeable, so which of the substances will move across it? i) water ii) salt iii) both water and salt iv) none d) What will happen to the volume of the cell? i) increase ii) decrease iii) stay the same i need help on this hw question. i tried it on my own but im not too sure if it's correct. the following are what i think the answers are: a) cytoplasm of the cell b) salt solution c) water d) decrease it would be helpful if you can confirm my answers and explain what i did wrong, thank you!Why must competent cells be kept on ice?What happens if plasma membrane fails to maintain optimal fluidity?