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Test: Zoology Mock Test - 3 - NEET MCQ


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45 Questions MCQ Test NEET Mock Test Series 2024 - Test: Zoology Mock Test - 3

Test: Zoology Mock Test - 3 for NEET 2024 is part of NEET Mock Test Series 2024 preparation. The Test: Zoology Mock Test - 3 questions and answers have been prepared according to the NEET exam syllabus.The Test: Zoology Mock Test - 3 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Zoology Mock Test - 3 below.
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Test: Zoology Mock Test - 3 - Question 1

In ABO system of blood grouping, transfusion is not possible from

Detailed Solution for Test: Zoology Mock Test - 3 - Question 1
As O will form antibodies(anti -a and anti -b)against blood group A so transfusion not possible
Test: Zoology Mock Test - 3 - Question 2

Which of the following best describes a vein?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 2
Most of the vein carry deoxygenated blood from tissue to back to the heart . since they carry deoxygenated blood , they are thin walled and very less muscular than arterioles. so the correct option is A
Test: Zoology Mock Test - 3 - Question 3

Which of the following hormones is steroid?

Test: Zoology Mock Test - 3 - Question 4
In albinism, the absence of the following pigment makes the skin and hairs very light coloured :
Test: Zoology Mock Test - 3 - Question 5

Which part of the brain is involved in thermoregulation?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 5

The hypothalamus plays a crucial role in thermoregulation, the process of maintaining the body's core internal temperature. It acts as the body's thermostat, detecting changes in temperature and initiating responses to heat or cool the body as necessary. The hypothalamus receives input from temperature receptors in the skin and other parts of the body and then activates mechanisms to adjust the temperature, such as sweating, shivering, and altering blood flow to the skin. An interesting fact about the hypothalamus is that it also regulates many other vital bodily functions, including hunger, thirst, sleep, and emotional activity.

Test: Zoology Mock Test - 3 - Question 6
Albinism is a congenital disorder resulting from the lack of the enzyme :
Test: Zoology Mock Test - 3 - Question 7

What is the primary role of the sympathetic nervous system?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 7

The primary role of the sympathetic nervous system is to prepare the body for stress or emergency situations, often referred to as the "fight or flight" response. It does this by increasing heart rate, dilating airways to improve oxygen intake, releasing stored energy, and diverting blood flow to essential organs and muscles. An interesting fact about the sympathetic nervous system is that it works in opposition to the parasympathetic nervous system, which promotes the "rest and digest" state that conserves energy and facilitates digestion and relaxation.

Test: Zoology Mock Test - 3 - Question 8
Organ most affected by alcohol is
Test: Zoology Mock Test - 3 - Question 9

What is the function of the corpus callosum?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 9

The corpus callosum is a thick band of nerve fibers that connects the left and right hemispheres of the brain, facilitating communication between them. This communication is crucial for coordinating functions that require the integration of activities on both sides of the body, such as walking, and for complex processes that involve combining different types of sensory information, reasoning, and memory. An interesting fact about the corpus callosum is that it contains about 200 million axonal projections, making it one of the largest connective pathways in the brain.

Test: Zoology Mock Test - 3 - Question 10

Which type of neurons are found in the retina of the eye?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 10

Bipolar neurons are found in the retina of the eye. These neurons have one axon and one dendrite extending from the cell body. They play a crucial role in the visual process by transmitting signals from the photoreceptor cells (which respond to light) to the ganglion cells, which then send the visual information to the brain for processing. An interesting fact about bipolar neurons is that their unique structure is perfectly adapted to their role in the sensory pathways, where they act as a relay between sensory input and the central nervous system.

Test: Zoology Mock Test - 3 - Question 11

Which of the following hormones is correctly matched with its function?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 11

Aldosterone, a hormone secreted by the adrenal cortex, plays a crucial role in regulating blood pressure through the promotion of sodium reabsorption and potassium excretion by the kidneys. Insulin actually decreases blood glucose levels, Thyroxine regulates metabolism and not specifically calcium metabolism (that's the role of parathyroid hormone), and Glucagon increases blood glucose levels.

Test: Zoology Mock Test - 3 - Question 12

The blood-brain barrier is impermeable to most substances except:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 12

The blood-brain barrier (BBB) is highly selective, primarily allowing gases like oxygen (O2) and carbon dioxide (CO2) to pass through freely due to their small size and nonpolar nature, facilitating essential gas exchange. Large, hydrophobic molecules and proteins are generally restricted, while small, hydrophilic molecules require specific transport mechanisms to cross the BBB.

Test: Zoology Mock Test - 3 - Question 13
True coelom is covered by
Test: Zoology Mock Test - 3 - Question 14

What is the consequence of hyposecretion of the antidiuretic hormone (ADH)?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 14

Hyposecretion of the antidiuretic hormone (ADH) leads to diabetes insipidus, a condition characterized by excessive thirst and excretion of large amounts of severely diluted urine.

Test: Zoology Mock Test - 3 - Question 15

Which hormone stimulates the development and differentiation of T lymphocytes?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 15

Thymosin, secreted by the thymus gland, stimulates the development and differentiation of T lymphocytes, which are crucial for the adaptive immune response, enhancing the body's ability to fight off pathogens.

Test: Zoology Mock Test - 3 - Question 16
The main activity that causes fluid to flow through lymphatic vessels is
Test: Zoology Mock Test - 3 - Question 17

Which of the following hormones is not a steroid hormone?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 17

 

Insulin is a peptide hormone, not a steroid hormone. Steroid hormones include estrogen, testosterone, and cortisol, which are synthesized from cholesterol and are lipid-soluble, allowing them to pass through cell membranes easily.

Test: Zoology Mock Test - 3 - Question 18

The release of which hormone is a direct response to a decrease in blood calcium levels?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 18

Parathyroid hormone (PTH) is released in response to a decrease in blood calcium levels. PTH acts to increase blood calcium levels by stimulating bone resorption, increasing calcium reabsorption in the kidneys, and activating vitamin D to increase calcium absorption from the gut.

Test: Zoology Mock Test - 3 - Question 19

Which part of the adrenal gland is responsible for secreting adrenaline and noradrenaline?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 19

The adrenal medulla, the inner part of the adrenal gland, is responsible for secreting catecholamines, including adrenaline (epinephrine) and noradrenaline (norepinephrine), which play a key role in the body's fight-or-flight response.

Test: Zoology Mock Test - 3 - Question 20
Molluscan blood contains
Test: Zoology Mock Test - 3 - Question 21

The hormone that stimulates milk production in the mammary glands after childbirth is:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 21

Prolactin is the hormone responsible for stimulating milk production in the mammary glands after childbirth. Oxytocin, on the other hand, is responsible for the ejection of milk during breastfeeding.

Test: Zoology Mock Test - 3 - Question 22

Which of the following conditions is caused by hypersecretion of growth hormone in adults?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 22

Acromegaly is caused by the hypersecretion of growth hormone in adults, leading to the enlargement of bones in the face, hands, and feet. Gigantism occurs when there is hypersecretion of growth hormone in children before the closure of growth plates.

Test: Zoology Mock Test - 3 - Question 23

The hormone known to regulate the circadian rhythm is:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 23

Melatonin, secreted by the pineal gland, is known to regulate the circadian rhythm, including sleep-wake cycles. Its levels vary in a daily cycle, rising in the evening to promote sleep and falling in the morning to help wakefulness.

Test: Zoology Mock Test - 3 - Question 24

Which of the following statements regarding the cardiac cycle is correct?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 24

Atrial systole occurs towards the end of ventricular diastole, allowing the atria to contract and push the remaining blood into the ventricles before they begin their contraction phase. This ensures efficient filling of the ventricles. The atrioventricular valves are actually closed during ventricular systole to prevent backflow of blood into the atria, and the semilunar valves are closed during ventricular diastole to prevent backflow from the arteries into the ventricles.

Test: Zoology Mock Test - 3 - Question 25
Forest destruction results in
Test: Zoology Mock Test - 3 - Question 26

In the human eye, the fovea is the site of:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 26

The fovea, located in the center of the retina, is the area with the highest concentration of cone cells, which are responsible for high-resolution, color vision. It is the point of sharpest vision in the eye. The blind spot, by contrast, is where the optic nerve exits the eye and contains no photoreceptor cells. Rod cells, which are more numerous in the peripheral regions of the retina, are responsible for vision in low light.

Test: Zoology Mock Test - 3 - Question 27
A person recovering from a head injury finds that she has difficulty maintaining balance. Which part of the brain has been injured?
Test: Zoology Mock Test - 3 - Question 28

Which of the following pairs is mismatched?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 28

Calcitonin, a hormone produced by the thyroid gland, actually lowers blood calcium levels by inhibiting osteoclast activity and stimulating calcium uptake and deposition in the bones. Oxytocin stimulates milk ejection during lactation, Adrenaline increases heart rate and prepares the body for a 'fight or flight' response, and Insulin decreases blood glucose levels by facilitating the uptake of glucose into cells.

Test: Zoology Mock Test - 3 - Question 29

The primary site of exchange of gases in the human respiratory system is the:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 29

The alveoli are tiny, balloon-like structures at the end of the respiratory tree, surrounded by a network of capillaries. They are the primary site for the exchange of oxygen and carbon dioxide between the lungs and the blood. The thin walls of the alveoli and their extensive surface area facilitate this gas exchange efficiently.

Test: Zoology Mock Test - 3 - Question 30
Cowper's glands are found in
Test: Zoology Mock Test - 3 - Question 31

In a neuron, the depolarization phase of an action potential is primarily the result of:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 31

The depolarization phase of an action potential in a neuron is primarily due to the rapid influx of sodium ions (Na+) into the cell. This sudden increase in positive charge inside the neuron shifts the membrane potential from negative to positive, creating the action potential. This process is critical for the transmission of nerve impulses along the neuron.

Test: Zoology Mock Test - 3 - Question 32

Which of the following is not a function of the liver?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 32

The synthesis of vitamin D primarily occurs in the skin under the influence of sunlight (UV rays). The liver does play a role in the conversion of vitamin D to its active form, but the initial synthesis is not a liver function. The liver is indeed responsible for bile production, regulating blood glucose levels through glycogen storage and breakdown, and detoxifying the blood by metabolizing drugs and filtering out toxins.

Test: Zoology Mock Test - 3 - Question 33

The genetic material of HIV (Human Immunodeficiency Virus) is:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 33

HIV is a retrovirus that contains single-stranded RNA as its genetic material. Upon entering a host cell, HIV uses an enzyme called reverse transcriptase to convert its RNA into double-stranded DNA, which can then integrate into the host's genome, a key step in the viral replication cycle.

Test: Zoology Mock Test - 3 - Question 34
Inhalation is caused by
Test: Zoology Mock Test - 3 - Question 35

Which of the following structures is not part of the human female reproductive system?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 35

The vas deferens is part of the male reproductive system, responsible for transporting sperm from the epididymis in anticipation of ejaculation. The uterus, ovaries, and Fallopian tubes are all integral components of the female reproductive system, involved in ovulation, fertilization, and gestation.

Test: Zoology Mock Test - 3 - Question 36
Part of skull having cranium, olfactory capsules and optic capsules is known as
Test: Zoology Mock Test - 3 - Question 37

Which hormone is involved in the regulation of blood pressure by controlling blood volume?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 37

Aldosterone, a mineralocorticoid hormone produced by the adrenal cortex, is involved in regulating blood pressure by controlling the reabsorption of sodium and water in the kidneys, thereby controlling blood volume.

Test: Zoology Mock Test - 3 - Question 38
The part of the hair below the surface of the skin is called the _____.
Test: Zoology Mock Test - 3 - Question 39

The hormone that increases the absorption of glucose by cells, lowering blood glucose levels, is:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 39

Insulin is the hormone that facilitates the absorption of glucose by cells, thereby lowering blood glucose levels. It is secreted by the beta cells of the pancreas in response to high blood glucose levels.

Test: Zoology Mock Test - 3 - Question 40

Which of the following glands is both an endocrine and an exocrine gland?

Detailed Solution for Test: Zoology Mock Test - 3 - Question 40

The pancreas functions as both an endocrine and an exocrine gland. Its endocrine function involves the secretion of insulin and glucagon by the Islets of Langerhans to regulate blood sugar levels, while its exocrine function involves the secretion of digestive enzymes into the small intestine.

Test: Zoology Mock Test - 3 - Question 41

The hormone responsible for the reabsorption of water from the collecting ducts in the kidneys is:

Detailed Solution for Test: Zoology Mock Test - 3 - Question 41

Antidiuretic hormone (ADH), also known as vasopressin, is responsible for the reabsorption of water from the collecting ducts in the kidneys, thereby concentrating the urine and reducing water excretion. This mechanism helps to maintain body water balance.

Test: Zoology Mock Test - 3 - Question 42

Low levels of sodium ions Na+ in the body result in the secretion of

Detailed Solution for Test: Zoology Mock Test - 3 - Question 42

Low sodium intake increases endogenous renin, angiotensin II, and aldosterone in parallel and does not allow discrimination between the effect of angiotensin II and effects of aldosterone on insulin secretion.

Test: Zoology Mock Test - 3 - Question 43

Assertion (A): The pituitary gland is referred to as the master gland.

Reason (R): It secretes hormones that regulate the functions of other endocrine glands.

Detailed Solution for Test: Zoology Mock Test - 3 - Question 43

The pituitary gland is indeed referred to as the master gland because it secretes various hormones that control the activities of other endocrine glands, making R the correct explanation for A.

Test: Zoology Mock Test - 3 - Question 44
The composition of the filtrate in the Bowman’s capsule is determined by
Test: Zoology Mock Test - 3 - Question 45

Assertion (A): Insulin decreases blood glucose levels.

Reason (R): It facilitates the uptake of glucose by cells and its conversion into glycogen in the liver.

Detailed Solution for Test: Zoology Mock Test - 3 - Question 45

Insulin does decrease blood glucose levels by promoting the uptake of glucose by cells and its storage as glycogen in the liver, making R the correct explanation for A.

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