NEET Zoology Class 11 Questions

Somatic neural system and autonomic neural system are the two divisions of

Match column I with column II and select the correct option from the given codes.

Which one of the following invertebrates is a protostomic, bilateral symmetric and pseudocoelomate:

Animals possess various type of symmetry, select the correctly matched:

Select the group of organism given below those have diploblastic members only:

Which substances are reabsorbed actively in nephron?

Select the correct option w.r.t. frogs.

Which part of nephron is not situated in the cortical region of the kidney?

The correct set for porifera is :

Transmission of a nerve impulse across is very similar to impulse conduction along a single axon.

Triploblastic, metamerically segmented, dioecious and coelomate animals are

Which of the following groups contains uricotelic animals only?

Which of the following is correct w.r.t. an adult human under normal physiological conditions?

Match the phylum given in column - I with their example given in column - II and choose the correct option.

Which of the following statements (i – v) are incorrect?

Mark INCORRECT combination (1) Hydra - polyp (2) Aurelia – medusa (3) Obelia – metagenesis (4) Adamsia - medusa

How many of the organisms given in the box below belong to the phylum Echinodermata? Aplysia, Antedon, Echinus, Ophiura, Ascaris, Euplectella Select the correct option.

Select the Taxon mentioned that represents both marine and fresh water species (1) Echinoderms (2) Ctenophora (3) Cephalochordata (4) Cnidaria

Complete the analogy and select the correct option. Renin: Kidney:: Aldosterone: ______.

Two hormones 'X' and 'Y' interact with intracellular receptors and mostly regulate gene expression or chromosomal function by the interaction of hormone-receptor complex with the genome. Select the option that correctly identifies 'X' and 'Y' respectively.

Assertion : Aschelminthes are called as pseudocoelomates. Reason : In aschelminthes, mesoderm is present as scattered pouches in between ectoderm and endoderm.

Which of the following muscles help to increase the volume of thoracic cavity?

Which of the these has a double closed type of circulatory system?

Role of pacemaker is:

Which segment of nephron allows passage of small amount of urea into the medullary interstitium?

What would be the cardiac output of a person having 72 heart beats minute and stroke volume of 50 ml?

Choose the correct statement.

Pacemaker of the heart in man is situated in:

What will happen if one kidney is removed from the body of a human being?

Sliding filament theory can be best explained as:

Which of the following is not a characteristic of chordates?

Upon arrival of a stimulus, the polarised state of a resting neuronal membrane is reversed by

How many pairs of cranial nerves are present in frog

Which one of the following are the incorrect match

Which of the following is the correct statement among tapeworm, hookworm and earthworm

Match the excretory disorder with its description.

Given diagram shows the germ layer. Which of the following option is correct regarding germ layer and their examples?

Indicate whether the following statements are true or false: (i) Micturition is carried out by a reflex. (ii) ADH helps in water elimination, making the urine hypotonic. (iii) Protein-free fluid is filtered from blood plasma into the Bowman's capsule. (iv) Henle's loop plays an important role in concentrating the urine. (v) Glucose is actively reabsorbed in the proximal convoluted tubule.

Cells of the human body exhibit three main types of movements, namely, amoeboid, ciliary and muscular. Which of the following given example correct for such movement? (i) Some specialised cells in our body like macrophages and leucocytes in blood exhibit amoeboid movement. (ii) Cytoskeletal elements like microfilaments are also involved in amoeboid movement. (iii) Muscular movement occurs in the trachea help us in removing dust particles and some of the foreign substances inhaled along with the atmospheric air. (iv) Passage of ova through the female reproductive tract is also facilitated by the ciliary movement. (v) Movement of our limbs, jaws, tongue, etc., require muscular movement. (vi) The contractile property of muscles is effectively used for locomotion and other movements by human beings and majority of multicellular organisms.

Match the entities in Column I with their Related taxa or organism in Column II.

Which statements are incorrect for mechanisms of nerve impulse conduction along electrical junctions of neuron or electrical synapse?

(i) Nerve impulse flow directly from one neuron to other across the synapses in electrical synapses.

(ii) Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon.

(iii) Impulse transmission across an electrical synapse is always faster than that across a chemical synapse.

(iv) Electrical synapses are rare in our system.

(v) At an electrical synapse, the membranes of the pre and post-synaptic neurons are separated by a fluid-filled space called synaptic cleft is thick.

(vi) Chemicals called neurotransmitters are involved in the transmission of impulses at this synapse.

Select the correct statement regarding the specific disorder of muscular or skeletal system:

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

Given diagram shows the symmetry of animals. Which of the following option is correct regarding diagram and their symmetry with examples?

A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?

Assertion: Axoplasm inside the axon contains high concentration of K⁺ low concentration of Na⁺ when neuron is not conducting any impulse. Reason: The axonal membrane is comparatively more permeable to potassium ions (K⁺) and nearly impermeable to sodium ions (Na⁺).

The pituitary hormones regulate the growth and development of somatic tissues and activities of peripheral endocrine glands. Select correct pair:

Given diagram shows the coelom of animals. Which of the following option is correct regarding coelom with examples?

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chance of fractures.

Reason (R): Common cause of osteoporosis is increased levels of estrogen.

In the light of the above statements, choose the most appropriate answer from the options given below :

The functioning of the kidneys is efficiently monitored and regulated by hormonal feedback mechanisms involving the hypothalamus, JGA and to a certain extent, the heart. From given statements about JGA control, select correct option from below:

(i) It control by Renin-Angiotensin mechanism.

(ii) A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin.

(iii) Renin converts angiotensinogen to angiotensin I.

(iv) Angiotensin II, being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.

(v) Angiotensin I activates the adrenal cortex to release aldosterone.

(vi) Aldosterone causes reabsorption of Na⁺ and water from the distal parts of the tubule. This also leads to an increase in blood pressure and GFR.