Tag: control and coordination in living organisms

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Questions Related to control and coordination in living organisms

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

Which one of the following is temporary endocrine gland?

  1. Pineal

  2. Pancreas

  3. Placenta

  4. Parathyroid
Reveal answer Fill a bubble to check yourself
C Correct answer
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).

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

In diabetes mellitus, what condition is not possible?

  1. Polyuria

  2. Loss of apetite

  3. Glycosuria

  4. Ketoacidosis
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice biology control and coordination in living organisms kidney hormones coordination in human beings- chemical control endocrine system in humans

Which of the following hormones is secreted by the kidney?

  1. Renin

  2. Renomedullary prostaglandin

  3. Erythropoietin

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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

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

For good reflex actions we require intact _____________.

  1. Spinal cord

  2. Medulla oblongata

  3. Hypothalamus

  4. Cerebellum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reflex actions are rapid, involuntary responses to stimuli that are primarily processed by the spinal cord, allowing for a faster reaction time than if the signal had to travel to the brain.

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

Which of the following is not a reflex action?

  1. Salivation

  2. Sweating

  3. Withdrawal of hand when pinched by needle

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice zoology control and coordination in living organisms the reflex action reflex action and reflex arc basic reflex action and reflex arc

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

  1. Biceps tendon reflex

  2. Knee jerk reflex

  3. Triceps tendon reflex

  4. Withdrawal reflex
Reveal answer Fill a bubble to check yourself
D Correct answer
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. 

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

Which one is not a reflex action?

  1. Closing the eye lids suddenly

  2. Release of saliva

  3. Obeying the order

  4. Pupillary constriction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Reflex actions are involuntary and automatic responses to stimuli managed by the nervous system. Closing eyelids, salivation, and pupillary constriction are involuntary reflexes, whereas obeying an order is a voluntary, conscious action.

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

Which one is correct about voluntary and involuntary movements?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.