Coordination In Life Processes (VSAQs)

Biology | 7. Coordination In Life Processes – VSAQs:
Welcome to VSAQs in Chapter 7: Coordination In Life Processes. This page contains the most important VSAQs in this chapter. Aim to secure top marks in your exams by understanding these clear and straightforward Very Short Answer Questions.

VSAQ-1 : What stimulates hunger? Which nervous system controls the hunger pangs?

Hunger is triggered by various factors, including:

  1. Ghrelin:
    This hormone is secreted from the stomach when it becomes empty and blood glucose levels fall. Ghrelin signals the brain to stimulate hunger.
  2. Central Nervous System (CNS):
    Specifically, the hypothalamus in the brain controls hunger pangs and regulates appetite. It receives signals from hormones like ghrelin and assesses the body’s energy and nutrient levels to initiate or suppress hunger.

VSAQ-2 : What happens if we press tongue against the palate we can recognise taste easily.

Effect of Pressing the Tongue Against the Palate on Taste Recognition

  1. Enhancing Contact with Taste Buds:
    Pressing the tongue against the palate helps bring food into direct contact with taste-sensitive cells, known as taste buds.
  2. Function of Taste Buds:
    These buds contain specialized receptor cells that recognize different taste molecules: sweet, sour, salty, bitter, and umami.
  3. Signal Transmission to the Brain:
    When stimulated by food chemicals, the taste buds send signals to the brain via the nervous system, enabling us to identify and perceive different tastes.

VSAQ-3 : What happens, if there is no peristaltic movement in oesophagus?

Impact of Absence of Peristaltic Movement in Esophagus

  1. Role of Peristalsis:
    Peristaltic movements in the esophagus are essential for moving the food bolus from the mouth to the stomach.
  2. Consequences of Absence:
    Without peristalsis, the food faces difficulty moving down the esophagus, potentially causing difficulty swallowing (dysphagia), chest pain, and a sensation of vomiting.
  3. Importance of Peristalsis:
    Peristalsis is vital for the smooth and coordinated movement of food through the digestive tract.

VSAQ-4 : Which part of small intestine absorb digested food?

Absorption of Digested Food in the Small Intestine

  1. Role of Villi:
    The villi, small finger-like projections lining the walls of the small intestine, are crucial for the absorption of digested food.
  2. Enhanced Surface Area:
    Villi increase the surface area of the small intestine, facilitating efficient nutrient absorption into the bloodstream, which is then distributed throughout the body.

VSAQ-5 : What happen if there is no mucus in the oesophagus?

Consequences of Absence of Mucus in the Esophagus

  1. Impaired Food Movement:
    Without mucus, food movement down to the stomach becomes less smooth. Mucus normally lubricates the esophagus, aiding in the smooth passage of food.
  2. Risk of Esophageal Damage:
    The esophageal walls may suffer damage due to friction and lack of lubrication. This can lead to difficulty in swallowing and discomfort. Mucus serves as a protective barrier against damage during food movement.