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ICSE Class 9 Human Anatomy and Physiology: respiratory system and skin — practice questions

Explore 28 free Human Anatomy and Physiology: respiratory system and skin questions in ICSE Class 9 Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Human Anatomy and Physiology: respiratory system and skin questions and exercises with answers

Showing questions 1–28 of 28.

Anatomically, the human respiratory tract is divided into:Read the answer and worked solution →What are the first two airways branching off from the trachea?Read the answer and worked solution →Dead-end terminal sacs of the respiratory tree where air exchanges are:Read the answer and worked solution →In mammals at rest, normal inhalation is driven primarily by:Read the answer and worked solution →The muscular diaphragm separates the thoracic cavity from the:Read the answer and worked solution →During resting inhalation, the rib cage is pulled upwards by:Read the answer and worked solution →In normal quiet expiration, the diaphragm and intercostal muscles:Read the answer and worked solution →The volume of air inspired or expired in a single quiet breath is the:Read the answer and worked solution →Air remaining in the lungs after a maximally forced exhalation is the:Read the answer and worked solution →Due to low water solubility, blood oxygen is mostly transported bound to:Read the answer and worked solution →Pulmonary surfactant preventing alveolar collapse is produced by:Read the answer and worked solution →On average, how many branchings occur in the adult human respiratory tree?Read the answer and worked solution →Roughly what percentage of total human body mass is formed by the skin?Read the answer and worked solution →How many primary structural layers compose human skin?Read the answer and worked solution →The outermost protective layer of human skin is scientifically termed:Read the answer and worked solution →Which statement accurately describes the vascularity of the epidermis?Read the answer and worked solution →What is the outermost horny sublayer of the human epidermis called?Read the answer and worked solution →The deepest sublayer of the epidermis, also called stratum basale, is:Read the answer and worked solution →The skin layer beneath the epidermis consisting of connective tissue is:Read the answer and worked solution →The superficial papillary region of the dermis is composed primarily of:Read the answer and worked solution →In which dermal layer are sweat glands and sebaceous glands located?Read the answer and worked solution →To promote heat loss from the body in warm temperatures, skin vessels:Read the answer and worked solution →In cold conditions, cutaneous vessels conserve heat primarily by:Read the answer and worked solution →Which nitrogenous excretory substance is naturally present in human sweat?Read the answer and worked solution →Match each respiratory tract structure with its protective or functional role:Read the answer and worked solution →Match each breathing phase with the mechanical muscular movements:Read the answer and worked solution →Match each skin layer with its structural component:Read the answer and worked solution →Match each dermal thermoregulation mechanism with its physical cooling response:Read the answer and worked solution →

Worked practice questions

Anatomically, the human respiratory tract is divided into:

  1. Lateral and medial zones
  2. Anterior and posterior
  3. Upper and lower tracts
  4. Dorsal and ventral arcs
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Correct answer: C. Upper and lower tracts

The respiratory tract is divided structurally into an upper tract and a lower tract.

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What are the first two airways branching off from the trachea?

  1. Right and left bronchi
  2. Lobular segments
  3. Terminal bronchioles
  4. Alveolar duct systems
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Correct answer: A. Right and left bronchi

The trachea divides at its inferior end into the right and left main bronchi.

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Dead-end terminal sacs of the respiratory tree where air exchanges are:

  1. Tracheal rings
  2. Alveolar sacs
  3. Bronchial buds
  4. Pleural spaces
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Correct answer: B. Alveolar sacs

Alveoli are microscopic dead-end terminal sacs where gas exchange occurs.

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