Cytophysiology 3
Cytophysiology Quiz
Test your knowledge on cytophysiology with our comprehensive quiz! This quiz covers essential concepts related to cell biology, from the mechanics of fertilization to the components of cell organelles.
- 18 engaging questions
- Multiple choice answers
- Perfect for students and enthusiasts alike
Which content of the cell is removed during the routine histological techniques?
Proteins
Glycogen
Nucleus
Lipids
Enzymes
Kind of receptors:
Ion channel coupled receptors act very slowly
G-protein contains only two subunits: alpha and beta units
Receptors coupled with G-protein are known as "seven-transmembrane receptors"
Ion channel coupled receptors are found mostly in the nervous system
Ion channel coupled receptors transform of chemical signals into the electrical signal by opening the channels
Steps of fertilization:
Passage of the sperm through the corona radiata
Penetration of the zona pellucida
Sperm binding with ZP1 of ZP, that is a specific sperm receptor
Entering of sperm together with mitochondria into the oocyte
Completion of the second meiotic division of the oocyte
Zona reaction:
Is the acrosomal reaction
Prevents fertilization of eggs by more than one sperm
Stop the ability of spermatozoa to adhere to and penetrate the zona pellucida
During the window of implantation, the blastocyst can attach to the endometrial epithelium
Implantation can only occur when the endometrium is receptive
Effects of fertilization include:
Restoration of haploid number of chromosomes
Determination of the sex of new individuals
Restoration of the dipoid number of chromosomes
Disappearing of the zona pellucida
Initiation of the cleavage of the zygote
Mitochondria:
Protects the cell from the effects of hydrogen peroxide
Are surrounded by two membranes
Contains enzymes of the respiratory chain in the inner membrane
Are responsible for storage of energy ATP molecules
Integral proteins of plasma membrane may act as:
Ion bounds
Ion channels
Enzymes of the respiratory chain
Disoglosomal enzymes
Receptor organs
Smooth endoplasmic reticulum:
Is a membranous organelle
Has no ribosomes bound to its cisterns
Is involved in protein synthesis
Is involved in steroid hormone synthesis
Protects cell from effects of hydrogen peroxide
Intermediate filaments:
Are made of keratin in epithelial cells
Are components of blood clot
Are not present in neurons
Can be found in the ground substance of connective tissue
Are made of vinculin in connective tissue
S-phase of cell cycle:
Is a phase of nucleus division
Contains G1 and G2 subphases
Is a resting phase
Is the phase of DNA replication
Contains checkpoints
What is true about lysozymes?
They have their own DNA
They are not surrounded by a plasma membrane
They contain hydrolytic enzymes
Are involved in digestion
Perform lipid synthesis
Metaphase:
Migration of chromosomes to the equator plane of the cell
Initiation of cleavage furrow
End of cell division
Nuclear elvelope and nucleolar formation
Immunochemestry:
Is a technique based on specific reactions between antibodies and antigens
Immunohistochemical reactions could be a one or two step reaction
It is the advanced and sophisticated staining method that specifically shows the detected marker in the tissue
HE staining is an example of IHC reaction
Two step IHC reaction need to use labeled primary antibodies
It could be one step or two step
Two step IHC is needed to use primary and secondary antibodies
PAS technique is an example of IHC reaction
The first stage of nondividing cells during erythropoiesis is:
Orthochromatophilic erythroblasts
Polychromatophilic erythroblasts
Proerythroblast
Reticulocyte
What is true about the G protein?
Contains an alpha subunit
Contains 3 subunits
Contains delta subunit
Is coupled with membrane receptors
Can produce ATP and reduce GTB
Is also called the "7 transmembrane receptor"
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