NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these help the cell maintain balance (homeostasis) by controlling what moves in and out of the cell?
A
ribosomes
B
cell membrane
C
bacteria
D
DNA
Explanation: 

Detailed explanation-1: -The cell membrane helps to regulate and slow down the flow of water into the cell. This is yet another way that the cell membrane helps maintain homeostasis.

Detailed explanation-2: -A membrane is the cell’s interface with the rest of the world-it’s gatekeeper, if you will. This phospholipid bilayer determines what molecules can move into or out of the cell, and so is in large part responsible for maintaining the delicate homeostasis of each cell.

Detailed explanation-3: -One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. The lipid bilayer is selectively permeable to small, nonpolar substances. Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.

Detailed explanation-4: -The hypothalamus is the control center for both normal body temperature homeostasis and febrile response.

Detailed explanation-5: -Homeostasis is maintained by a series of control mechanisms functioning at the organ, tissue or cellular level. These control mechanisms include substrate supply, activation or inhibition of individual enzymes and receptors, synthesis and degradation of enzymes, and compartmentalization.

There is 1 question to complete.