Answer: Option A. "Cytoskeleton"
Explanation:
Cytoskeleton can be defined as the network of protein filaments in the cytoplasm eukaryotic cells interlinking from cell nucleus to cell membrane.
There are three basic types of protein fibers present in cytoskeleton that includes micro filaments (Actin filaments ), microtubules and intermediate filaments.
Microfilaments are consist many linked monomers of a protein known as actin, that combines in a double helix with a diameter of about 7 nano-meter and functions as serving tracks for myosin (motor protein).
Microtubules are arranged in a form of hollow straw like structure made up of consist of tubulin proteins having diameter of about 25 nano-meter and further consist of two subunits, α-tubulin and β-tubulin.
Intermediate filaments are the cytoskeletal element which are made up of multiple strands of fibrous proteins wounded together having an average diameter of 8 to 10 nano-meter.
Answer:
D. they are all primarily acquired in childhood
Answer: Liver
Explanation:
The liver is the largest gland in the body, weighing 1200 to 1500g, with a smooth surface and reddish-brown color. It is located in the upper right quadrant of the abdomen, it is pyramidal in shape, and is in a slightly oblique position, Having two faces: one upper anterior, directly in contact with the diaphragm and a lower poster, directly in contact with the underlying abdominal viscera. the falciform ligament topographically divides the diaphragmatic liver face into right and left lobes.
Fixing the upper poster, in each hepatic lobe, we find the coronary ligaments, which unite at their extreme laterals giving rise to the triangular ligaments and anteriorly on the diaphragmatic face, originating the falciform ligament.
