Tag: control and coordination in living organisms

Questions Related to control and coordination in living organisms

Which one of the following is temporary endocrine gland?

biology control and coordination in living organisms hormones of placenta coordination in human beings- chemical control endocrine system in humans

  1. Pineal

  2. Pancreas

  3. Placenta

  4. Parathyroid

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Correct Option: C
Explanation:

The placenta is an endocrine gland, that is only present during pregnancy. It produces hormones including human chorionic gonadotropin (hCG), progesterone, estrogen, and human placental lactogen (hPL).

In diabetes mellitus, what condition is not possible?

bio-chemistry control and coordination in living organisms diabetes mellitus lifestyle diseases coordination in human beings- chemical control non-infectious diseases

  1. Polyuria

  2. Loss of apetite

  3. Glycosuria

  4. Ketoacidosis

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Correct Option: B
Explanation:

In diabetes mellitus, either body doesn't make enough insulin, or it can't use the insulin it does produce, or a combination of both. The cells need insulin to take in the glucose and use it for energy. Since, the cells can't take in the glucose, it builds up in blood. Common symptoms include the following: frequent urination, excessive thirst, unexplained weight loss, extreme hunger, sudden vision changes, tingling or numbness in the hands or feet, feeling very tired much of the time, very dry skin, sores, that are slow to heal, more infections than usual.

Which of the following hormones is secreted by the kidney?

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  1. Renin

  2. Renomedullary prostaglandin

  3. Erythropoietin

  4. All of the above

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Correct Option: D
Explanation:

The human kidney secretes many hormones: erythropoietin (EPO), calcitriol, vitamin $D _3$, as well as the enzyme renin. The kidneys also produce prostaglandins.

For good reflex actions we require intact _____________.

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. Spinal cord

  2. Medulla oblongata

  3. Hypothalamus

  4. Cerebellum

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Correct Option: A

Which of the following is not a reflex action?

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. Salivation

  2. Sweating

  3. Withdrawal of hand when pinched by needle

  4. None of these

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Correct Option: B
Explanation:

An automatic (involuntary) neuromuscular action excited by a defined stimulus is called reflex action. Sweating is not a reflex action. It is primarily a means of temperature regulation. But, Salivation and hand withdrawal because of the needle both are reflex actions.

Classify the following into reflex action and in voluntary actions of brain.

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. Beating of heart

  2. Withdrawing your hand inmediately on touching a hot object

  3. Change in size of pupil in response to intensity of light

  4. Riding a bicycle

  5. Sneezing

  6. pulling up the leg immediately when foot falls on some sharp object.

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Correct Option: A

Reflex action is the function of brain stem.

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. True

  2. False

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Correct Option: A

The direction of against stimulus response is opposite in which of the following reflex action?

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. Biceps tendon reflex

  2. Knee jerk reflex

  3. Triceps tendon reflex

  4. Withdrawal reflex

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Correct Option: D
Explanation:

Option 'D' is correct


Withdrawal reflex is the reflex that involves the withdrawal is response to stimulus. It is also known as pair withdrawal reflex. When pair receptors are stimulated, reciprocal innervation stimulate the flexons to withdrawal and inhibit the extensors. 

Which one is not a reflex action?

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. Closing the eye lids suddenly

  2. Release of saliva

  3. Obeying the order

  4. Pupillary constriction

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Correct Option: A

Which one is correct about voluntary and involuntary movements?

zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

  1. Voluntary movements- caused by skeletal muscle, Involuntary movements- caused by smooth muscle

  2. Voluntary movements- caused by smooth muscle, Involuntary movements- caused by skeletal muscle

  3. Voluntary movements- controlled by brain, Involuntary movements- controlled by organs

  4. Voluntary movements- controlled by organs, Involuntary movements- controlled by brain

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Correct Option: A
Explanation:

Voluntary movements are movements that are in direct control of the will of a person. These are controlled by skeletal muscles. For example walking, talking, dancing, etc. Involuntary movements are movements that are not in control of a person. They are generated by smooth striated muscle. For example, heart pumping, digestion, etc.