Endocrine System Hormones Quiz
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Questions and Answers

What is the main function of the Autonomic Nervous System (ANS) in vertebrates?

  • Regulate involuntary actions
  • Control and coordinate voluntary muscular activities
  • Protect the body from harm by controlling reflex actions (correct)
  • Link and coordinate activities of different body organs

    • Which part of the vertebrate nervous system includes nerves originating from peripheral nerves and spinal nerves?

  • Autonomic Nervous System (ANS) (correct)
  • Brain & Spinal cord
  • Peripheral Nervous System (PNS)
  • Central Nervous System (CNS)

    • What specialized tissues are responsible for providing control and coordination in animals?

  • Neurons, Nerves and Nervous organs (correct)
  • Vascular tissues
  • Endocrine tissues
  • Muscular tissues only

    • In the context of the nervous system, what is the function of the Central Nervous System (CNS)?

    <p>Comprise the Brain &amp; Spinal cord (B)</p> Signup and view all the answers

    What is the role of the nervous system in regulating voluntary muscular activities?

    <p>Coordinate activities of different body organs (D)</p> Signup and view all the answers

    Which system consists of conducting tissues that receive stimuli and transmit them to other parts of the body in living organisms?

    <p>Nervous System (B)</p> Signup and view all the answers

    What is the main function of a receptor in the nervous system?

    <p>Detect particular stimulus and initiate the transmission of impulse via sensory nerves (C)</p> Signup and view all the answers

    What is the unit of the nervous system responsible for transmitting nerve impulses?

    <p>Neurons (D)</p> Signup and view all the answers

    Why do neurons not divide after their formation?

    <p>Because they lack centrioles and are long in length (C)</p> Signup and view all the answers

    What is the role of synapses in the nervous system?

    <p>To transmit impulses between neurons (D)</p> Signup and view all the answers

    How is a nerve impulse defined?

    <p>An electrical signal passing through neurons (D)</p> Signup and view all the answers

    Who is credited with discovering synapses?

    <p>Sir Charles Sherington (D)</p> Signup and view all the answers

    What is the main function of the 3F hormone mentioned in the text?

    <p>Prepare for fight, flight, or fright response (A)</p> Signup and view all the answers

    Which hormone is responsible for stimulating the uterine lining for embryo implantation?

    <p>Estrogen (B)</p> Signup and view all the answers

    In plants, which type of movement is dependent on growth, such as the movement of tendrils in climber plants?

    <p>Growth-based movement (B)</p> Signup and view all the answers

    How do plants respond to external stimuli according to the text?

    <p>By changing cell shape through water regulation (B)</p> Signup and view all the answers

    Which hormone secretion helps regulate blood calcium levels when they are decreased?

    <p>Parathormone (B)</p> Signup and view all the answers

    What is the main role of progesterone and estrogen mentioned in the text?

    <p>Maintain pregnancy and prepare for lactation (B)</p> Signup and view all the answers

    Which plant growth regulator is responsible for preventing premature leaf fall?

    <p>Ethylene (A)</p> Signup and view all the answers

    What is the main function of Abscisic Acid (ABA) among the plant growth regulators mentioned?

    <p>Promotes seed dormancy (C)</p> Signup and view all the answers

    Which plant growth regulator reverses the growth-promoting effects of Auxin and Gibberellins?

    <p>Gibberellins (B)</p> Signup and view all the answers

    Among the regulators, which one specifically stimulates cell division and lateral branching?

    <p>Cytokinin (A)</p> Signup and view all the answers

    Which plant growth regulator is responsible for promoting the elongation of roots and stems but causes lateral expansion?

    <p>Ethylene (B)</p> Signup and view all the answers

    What is the primary function of Gibberellins described in the text?

    <p>Breaks genetic dwarfism (A)</p> Signup and view all the answers

    What is the term for the directional growth or movement of a plant organ in response to external stimuli?

    <p>Tropic movement (D)</p> Signup and view all the answers

    Which type of tropism is characterized by the movement of a plant part in response to light?

    <p>Phototropism (B)</p> Signup and view all the answers

    In which direction does geotropism cause growth in plants?

    <p>Upward or downward in response to gravity (A)</p> Signup and view all the answers

    What is the term for the growth of a part of a plant in response to a chemical stimulus?

    <p>Chemotropism (D)</p> Signup and view all the answers

    Which group of plant hormones are synthesized at the shoot tip of the plant body?

    <p>Auxin (A)</p> Signup and view all the answers

    How do plant hormones help in the growth, development, and response to the environment?

    <p>They coordinate growth, development, and environmental responses (C)</p> Signup and view all the answers

    Study Notes

    Autonomic Nervous System (ANS)

    • The main function of the ANS is to regulate involuntary actions, such as heart rate, breathing, and digestion.

    Nervous System

    • The peripheral nervous system (PNS) includes nerves originating from peripheral nerves and spinal nerves.
    • The nervous system consists of specialized tissues responsible for providing control and coordination in animals.
    • The Central Nervous System (CNS) integrates and processes information from sensory receptors and sends responses to effector organs.
    • The nervous system regulates voluntary muscular activities through the CNS.

    Nerve Impulses

    • The unit of the nervous system responsible for transmitting nerve impulses is the neuron.
    • Neurons do not divide after their formation.
    • The role of synapses is to facilitate the transmission of nerve impulses between neurons.
    • A nerve impulse is a wave of electrical activity that travels along the length of a neuron.

    Hormones

    • The 3F hormone (not specified in the text) has a main function that is not mentioned.
    • Progesterone is responsible for stimulating the uterine lining for embryo implantation.

    Plant Growth and Movement

    • Plants respond to external stimuli through growth, movement, or tropism.
    • Tendrils in climber plants exhibit tropistic movement dependent on growth.
    • Hormone secretion helps regulate blood calcium levels when they are decreased.
    • Progesterone and estrogen have a main role in regulating the female reproductive cycle.
    • Abscisic Acid (ABA) is responsible for preventing premature leaf fall.
    • Ethylene reverses the growth-promoting effects of Auxin and Gibberellins.
    • Auxin stimulates cell division and lateral branching.
    • Gibberellins promote the elongation of roots and stems but cause lateral expansion.
    • Tropism is the directional growth or movement of a plant organ in response to external stimuli.
    • Phototropism is characterized by the movement of a plant part in response to light.
    • Geotropism causes growth in plants in the direction of gravity.
    • Chemotropism is the growth of a part of a plant in response to a chemical stimulus.
    • Auxins are synthesized at the shoot tip of the plant body.
    • Plant hormones help in growth, development, and response to the environment.

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