Homeostasis and Cellular Physiology is part of the General Physiology section of Physiology. Practise 24 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
Lysosomal autophagy, feedback loops, Golgi sorting and the cytoskeleton — actin, microtubules and their roles in shape and motility — run through these Homeostasis and Cellular Physiology MCQs, which turn cell basics into high-yield NEET PG revision.
Autophagy Lysosomes also play a key role in organelle turnover The organelle to be destroyed fuses with a lysosome to produce an autophagolysosome and destroyed The Nobel prize in physiology or medicine 2016 was awarded to Yoshinori Ohsumi for his discoveries of mechanisms for autophagy Reference: Ganong, 25th edition page no. 37
Thrombus formation is an example of positive feedback Negative feedback- an INCREASE level of that particular parameter is immediately followed by a DECREASE Examples of negative feedback are: Blood pressure regulation by Baroreflex Endocrine Hormone Regulation. Reference: Guyton, 13 th edition page no.7
Intercellular communication in eukaryotes is by exosome. Exosomes are derived from Multivesicular bodies (MVB). These extracellular vesicles are mediators of cell to cell communication in eukaryotes. Other options: Option A: Lysosomes are membrane-bound spherical organelles which contain a variety of hydrolytic enzymes meant for intracytoplasmic digestion. Lysosomes remove intracellular products of metabolism from the cell. Option B: Peroxisomes are small spherical organelles that contain oxidases which promote oxidation of lipids and catalases that liberate oxygen from H2O2. They protect the tissue from oxidative stress. Option C: The genetic information stored in chromosomes of a cell is known as the genome. The human genome contains about 3 billion nucleotide pairs and in diploid cells they are organized into 23 pairs of chromosome
Microfilaments Are mainly actin and myosin concerned with muscle contraction and cell motility Some types of cell motility occur solely as the result of actin polymerization and do not involve the activity of myosin Reference: Ganong, 25th edition page no.38
Body surface area is the most important factor that affects basal metabolic rate "Rubner's law" states that BMR should be related to surface area rather than body mass. This law is also called as "surface law of metabolism" Reference: Ganong, 25 th edition page no.488
Major functions of Golgi apparatus are - sorting of proteins and post translational modification (glycosylation) Reference: Ganong, 25th edition page no 44.
Microtubules made up of two globular protein subunits: α and β-tubulin They play a very important role in determining cell shape and motility Reference: Ganong, 25th edition/page no. 38
Ohm's Law which deals with relationship between potential difference, current and resistance V =I * R In vascular physiology, current flow is equated with the blood flow (F) and the voltage difference is equated with the pressure difference (P) across the vessel wall. So, the modified Ohm's Law is, P =F * R Reference: Ganong, 25th edition page no.572
Lysosomal autophagy, feedback loops, Golgi sorting and the cytoskeleton — actin, microtubules and their roles in shape and motility — run through these Homeostasis and Cellular Physiology MCQs, which turn cell basics into high-yield NEET PG revision.
MedLadder includes 24 curated MCQs for Homeostasis and Cellular Physiology under Physiology (General Physiology), covering NEET PG, FMGE, INI-CET and NEET SS preparation.
