Recent questions in Biology

What are (a) and (b)? The mitotic division starts as the zygote moves through the isthmus of the oviduct called _ towards the uterus and forms 2, 4, 8, 16 daughter cells called ____ .

asked Mar 26, 2014 by pady_1

1 answer

Small amounts of urea enter the _____ (K) of _ (J) which is transported back to the interstitium by the _____ (L). The above described transport of substances facilitated by the special arrangement of Henle’s loop and vasa recta is called the counter current mechanism that helps to maintain a concentration gradient in the _ (C). Presence of such interstitial gradient helps in an easy passage of water from the _______ (L).

asked Mar 26, 2014 by pady_1

1 answer

___ (D) is transported by the (E) of _ (J) which is exchanged with the ____ (G) of _ (I). (D) is returned to the interstitium by the (H) of __ (I).

asked Mar 26, 2014 by pady_1

1 answer

The proximity between the _ and , as well as the in them help in maintaining an increasing osmolarity from 300 mOsmolL–1 in the _ (A) to about 1200 mOsmolL–1 in the _____ (C). This gradient is mainly caused by _ and ________ .

asked Mar 26, 2014 by pady_1

1 answer

Each nephron has two parts – the glomerulus and the renal tubule. Glomerulus is a tuft of capillaries formed by the _______ (A). Blood from the glomerulus is carried away by an (B). The renal tubule begins with (C), which encloses the glomerulus. alongwith _ (C), is called the (D). The tubule continues further to form a highly coiled network – __ (E).

asked Mar 26, 2014 by pady_1

1 answer

A hairpin shaped __________ (C) is the next part of the tubule which has (D) and _ (E). The _ (H) emerging from the (I) forms a fine capillary network around the renal tubule called the peritubular capillaries. A minute vessel of this network runs parallel to the (C) forming _______ (J) .

asked Mar 26, 2014 by pady_1

1 answer

Each nephron has two parts – the glomerulus and the renal tubule. The renal tubule begins with (A) and continues further to form a highly coiled network – (B) . (C) is the next part of the tubule whose ascending limb continues as another highly coiled tubular region called (F). The (F) of many nephrons open into a straight tube called _________ (G) .

asked Mar 26, 2014 by pady_1

1 answer

Identify F,G, H, I and J in order :

asked Mar 26, 2014 by pady_1

1 answer

Inside the kidney there are two zones, an _____ (A) and an _ (B). The medulla is divided into a few conical masses (C) projecting into the . The cortex extends in between the medullary pyramids as ____ (E).

asked Mar 26, 2014 by pady_1

1 answer

Identify A, E, G, K, N, O, P in order in the picture :

asked Mar 26, 2014 by pady_1

1 answer

The (I) and (J) branches give rise to minute fibres throughout the ventricular musculature of the respective sides and are called . These fibres alongwith (I) and (J) are known as ______ (L) .

asked Mar 26, 2014 by pady_1

1 answer

A bundle of nodal fibres, ________ continues from the (D) which passes through the to emerge on the top of the _ (H) and immediately divides into a (I) and (J).

asked Mar 26, 2014 by pady_1

1 answer

A patch of nodal tissue present in the _ of the (C) is called the (B). Another mass of nodal tissue seen in the called the ____________ (D) .

asked Mar 26, 2014 by pady_1

1 answer

A thin, muscular wall called the separates the right and the left atria, whereas a thick-walled, (H) , separates the left and the right ventricles. The atrium and the ventricle of the same side are also separated by a thick fibrous tissue called the ___ .

asked Mar 26, 2014 by pady_1

1 answer

Regarding ECG - choose the incorrect answer :

asked Mar 26, 2014 by pady_1

1 answer

What are E,F and G in order?

asked Mar 26, 2014 by pady_1

1 answer

What are C and D in order? What does the looped part represent?

asked Mar 26, 2014 by pady_1

1 answer

What are A and B in order ? What does the looped part represent?

asked Mar 26, 2014 by pady_1

1 answer

During contraction : 1. Actin filaments are pulled towards the centre of ‘A’ band. The ‘Z’ line attached to these actins are also pulled inwards thereby causing a shortening of the sarcomere. 2. ‘I’ bands get reduced, whereas the ‘A’ bands retain the length Regarding 1 and 2 : What are A,B and C in order?

asked Mar 26, 2014 by pady_1

1 answer

Which of the following is important for muscle contraction and nerve transmission ?

asked Mar 26, 2014 by pady_1

1 answer

The HMM component projects outwards at regular distance and angle from each other from the surface of a polymerised myosin filament and is known as _____ (D) . The _ (C) is an active ATPase enzyme and has binding sites for _ (B) and _______ (A).

asked Mar 26, 2014 by pady_1

1 answer

Structure of Contractile Proteins (Myosin) : Many monomeric proteins called _ (E) constitute one thick filament. Each (E) has two important parts, a (C) with a and , the former being called the and the latter, the ____ .

asked Mar 26, 2014 by pady_1

1 answer

Structure of Contractile Proteins (Actin) : Each actin filament is made of two __ (C) helically wound to each other. Each (C) is a polymer of monomeric . Two filaments of another protein, _ (B) also run close to the (C) throughout its length. In the resting state a subunit of ___ (A) masks the active binding sites for myosin on the actin filaments

asked Mar 26, 2014 by pady_1

1 answer

The portion of the muscle fibre between two successive _ (A) is considered as the functional unit of contraction and is called a (E) . In a resting state, the edges of thin filaments on either side of the thick filaments partially overlap the free ends of the thick filaments leaving the central part of the thick filaments. This central part of thick filament, not overlapped by thin filaments is called the (D) .

asked Mar 26, 2014 by pady_1

2 answers

In the centre of each _______ (C) is an elastic fibre called (A) which bisects it. The thin filaments are firmly attached to the _ (A). The thick filaments in the (B) are also held together in the middle of this band by a thin fibrous membrane called _ . The (B) and ___ (C) are arranged alternately throughout the length of the myofibrils.

asked Mar 26, 2014 by pady_1

1 answer

Each myofibril has alternate dark and light bands on it. The light bands contain and is called _ (C), whereas the dark band called (B) contains ___ .

asked Mar 26, 2014 by pady_1

1 answer

Each organised skeletal muscle in our body is made of a number of ________ (A) held together by a common collagenous connective tissue layer called _ . Each __ (A) contains a number of _ (B). Each is _ (B) lined by the plasma membrane called __________ (C).

asked Mar 26, 2014 by pady_1

1 answer

Hypothalamic hormones originating in the __________ (A), pass through axons and are released from their nerve endings. Hypothalamic hormone reach the pituitary gland through a _ (B) and regulate the functions of the (D). The (C) is under the direct neural regulation of the ________ (E).

asked Mar 26, 2014 by pady_1

1 answer

Hormones which interact with _______ mostly regulate by the interaction of _ (C) with the _______ (D).

asked Mar 26, 2014 by pady_1

1 answer

Hormones which interact with _ (A) normally do not enter the target cell, but _______ (B) which in turn regulate cellular metabolism.

asked Mar 26, 2014 by pady_1

1 answer

The _______ (C) is a structure located on the (D)which contains that act as auditory receptors. A large number of processes called _ are projected from the apical part of each hair cell. Above the rows of the hair cells is a thin elastic membrane called _________ (F).

asked Mar 26, 2014 by pady_1

1 answer

The membranes constituting cochlea, the ____ (A) and (D), divide the surounding perilymph filled bony labyrinth into _ (G) and _ (E). The space within cochlea called ________ (B) is filled with endolymph.

asked Mar 26, 2014 by pady_1

1 answer

The ear ossicles increase the efficiency of transmission of sound waves to the inner ear. An ________ (G) connects the middle ear cavity with the pharynx. The _ helps in equalising the pressures on either sides of the ear drum. The coiled portion of the labyrinth is called ___ (F).

asked Mar 26, 2014 by pady_1

1 answer

The middle ear contains three ossicles called ____ (A), (B) and _ (C) which are attached to one another in a chain-like fashion. The __ (A) is attached to the _ (H) and the is attached to the ________ (D) of the cochlea.

asked Mar 26, 2014 by pady_1

1 answer

The space between the cornea and the lens is called the __ (A) and contains a thin watery fluid called . The space between the lens and the retina is called the (K) and is filled with a transparent gel called _ .

asked Mar 26, 2014 by pady_1

1 answer

The _______ (G) leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eye ball. Photoreceptor cells are not present in that region and hence it is called the (H) . At the posterior pole of the eye lateral to the _ (H) , there is a yellowish pigmented spot called _ with a central pit called the _____ (I) .

asked Mar 26, 2014 by pady_1

1 answer

The __ (B) itself continues forward to form a pigmented and opaque structure called the (D) which is the visible coloured portion of the eye. The eye ball contains a transparent crystalline (L) which is held in place by ligaments attached to the (B) . The inner layer is the _ (J).

asked Mar 26, 2014 by pady_1

1 answer

The external layer (among three layers of eye) is composed of a dense connective tissue and is called the _____ (E) . The anterior portion of this layer is called the _ (C) . The middle layer, __________ (F) , contains many blood vessels and looks bluish in colour. The _ (F) layer is thin over the posterior two-thirds of the eye ball, but it becomes thick in the anterior part to form the __________ (B).

asked Mar 26, 2014 by pady_1

1 answer

Identify the structures marked as G, H, I and J in order in the picture:

asked Mar 26, 2014 by pady_1

1 answer

The _____ (C) receives signal from a (B) and transmits the impulse via a (D) into the CNS (at the level of spinal cord). The (E) then carries signals from CNS to the _ (F). The _ (A) and (K) thus forms a reflex arc as shown below in the ________ reflex.

asked Mar 26, 2014 by pady_1

1 answer

1. The left and right cerebral hemispheres are connected by a tract of nerve fibres called ________ (K). 2. The _(F) comprises (G), (M) and _____ (H).

asked Mar 26, 2014 by pady_1

1 answer

A canal called the ___________(L) passess through the midbrain. _ (E) and _ (F) form the ________ (I) .

asked Mar 26, 2014 by pady_1

1 answer

The ______ (E) is located between the (B) / ( C) of the _(D) and _ (G) of the __ (F) .

asked Mar 26, 2014 by pady_1

1 answer

The _______ (D) consists of _(A), (B) and ( C) . _______ forms the major part of the human brain.

asked Mar 26, 2014 by pady_1

1 answer

Pre synaptic neurons in response to stimuli release their neurotransmitters in the . The released neurotransmitters bind to their specific __ . What is (A)?

asked Mar 26, 2014 by pady_1

1 answer

At a _ (F) , the are separated by a fluid-filled space called ___ .

asked Mar 26, 2014 by pady_1

1 answer

Identify the structure and fill in the blanks) The distal end of axon is branched and each branch terminates as a bulb-like structure called ____________________ .

asked Mar 26, 2014 by pady_1

1 answer

A neuron is a microscopic structure composed of three major parts - ______ , and _ . The cell body contains cytoplasm with typical cell organelles and certain called . The ___ is a long fibre, the distal end of which is branched.( Identify the structure and fill in the blanks)

asked Mar 26, 2014 by pady_1

1 answer

Identify the enzyme X ? Where it is present? Every 100 ml of deoxygenated blood delivers approximately ___ ml of CO2 to the alveoli

asked Mar 26, 2014 by pady_1

1 answer

(i) What curve is this? (ii) How is this curve plotted ? (iii) What are the uses of this curve ?

asked Mar 26, 2014 by pady_1

1 answer

Ask Questions, Get Answers