The release of succus entericus, that is, intestinal juice is controlled by the hormonal and nervous regulations. It is composed of water (99%), mucous, inorganic salts, enzymes, etc. it is alkaline in nature for the action of its enzymes.

The substrate for enterokinase is inactive trypsinogen. It converts inactive trypsinogen to active trypsin. It is present in intestinal juice.

Renal colic is the severe pain that occurs in the back, spreading down to thighs. It is caused due to the formation of stone that is uric acid or oxalate precipitate, in the kidney which blocks the kidney tubule.

The renal medulla consists of cone-shaped renal pyramids. The base of each pyramid faces the renal cortex and its apex called the renal papilla, points towards the renal hilium.

The colour of urine is slightly yellow or amber. This is due to urochrome which is the pigment produced from the breakdown of bile, and Urobilin, from the breakdown of haemoglobin.

Cytoplasmic streaming is the cause of Cyclosis. It leads to proper transport of nutrients and metabolites within the cell. Also it helps in exchange of materials within organelles.

Contraction of the muscle cells for the mobility of an organism is the result of interaction of two contractile proteins. They are actin and myosin proteins which are responsible for the movement of body to stimulus.

On the basis of function smooth muscles can be divided into two types. They are single unit smooth muscle and multi-unit smooth muscle. Single unit smooth muscles are composed of muscle fibres closely joined together, contract as a single unit, for example, urinary bladder. Multi-unit smooth muscles are composed of more independent muscle fibres, contract as separate units, for example, hair root muscles.

The Barr body is seen abutting against the inner surface of the nuclear membrane of the cytons in females. These are the compensated X-chromosomes in a female-XX organism.

The humans have three layers of choroid plexus. They are lateral choroid plexus, anterior choroid plexus and posterior choroid plexus or pelochoroida.

We know that the force exerted on charge is 

F= qBv, F=0, when v= 0 

i.e., a stationary charge experiences no force in a magnetic field.

Total voltage drop= 150 x 8 =1200 V 

Total resistance of wire R = 0.5 x 150 = 75 ohm

Power loss = V²/R = 1200x1200/75 = 19.2 kW

Blood is best described as a colloidal suspension or sol. It is a colloidal sol because its solid material is evenly suspended in liquid phase. Dispersion medium of blood is liquid and dispersed phase is solid.